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- -:-( Punk Rocker
!-( Black Eye
## waffles - or so Eenie says :D
#( Lips are sealed 
#-) Dead / Partied ALL Night
#:-) From a person with matted hair 
#:-0 Ahhhhhhhhhhhhhhhhh
#:o+= Betty Boob
$-) I'm a yuppie / Lotto fever / Won the Lottery
$ex Sex [Ususally used by deprived individuals to get around swear kickers]
%-) At keyboard 12 hours / Cross-eyed, silly / Stared too long at a monitor
%*@:-( Hung Over
%-^) Picasso
%+{ Lost A Fight
%+| Beaten Up
%-6 Braindead
&&&& Pretzels
&-( Crying
&:-) Curly hair
( o ) ( o ) Hooters
(( )):** Hugs and Kisses
(((((name)))) Hug (cyber hug)
(-) Needs a Haircut
(.)(.) Ms. Dos
(: (=| Wearing a Ghost Costume
(-: I'm a lefty / User is left-handed
(:-$ Ill
(:-) Bald Guy
(:)-) Scuba Diving
(:-* Kissing
(:-... Broken Heart
(::()::) Bandaide
(-::-) Siamese Twins
(-:|:-) We're siamese twins 
(:=) Two Noses
(:>-< Thief
(:-D Blabber Mouth
(:-I Egghead
(@@) You're kidding
(_) Mug (coffee, beer)
(-_-) Secret smile
(00) Pulling a Mooner
(8-) Gorilla / Wearing (sun) glasses / Oh boy! Used to denote wide-eyed look ( with a smile ?).
(International Telephone And Telegraph Consultative Commitee)
(O--< A fishy message... 
-) Always Wear Safety Glasses
-):......... I'm dyslexic
):-P :-P with a forehead
*!#*!^*&:-) A Schizophrenic
*-( A Cyclops Poked in the Eye
*-) Shot Dead / Stoned 
**** Popcorn
****:-) I look like Marge Simpson 
*:* Fuzzy
*:o) Bozo the Clown
*_* Not well/dizzy
*<:-) Santa Claus
*<:-)( Santa Claus
*8-) Beaker (The Muppet)
*eg* Evil grin 
*g* Grin 
*gbh&k* Great big hug & kiss 
*gbh* Great big hug 
*gr&d* Grinning, running, & ducking 
*h* Hug 
*hb* Hug back 
*k* Kiss 
*kb* Kiss back 
*L* Blotto / Laugh 
*li* Laughing inside 
*lis* Laughing in silence 
*lol* Laugh out loud 
*rofl* Roll on floor laughing 
*s* Smile 
*sb* Smiles back 
*tic* Tongue in cheek 
*veg* Very evil grin 
*ves* Very evil smile 
*vwg* Very wicked grin 
*vws* Very wicked smile 
*w* Wink
*wg* Wicked grin 
.-) Keeping an eye out / One Eyed
..---... SOS .\/ Duck
...---... S.O.S.
.^) Side View
/:-) French
/:-| Mr. Spock
: };^)' Lil devil
:' Crying
:-! Foot in Mouth / A smoker / Smoking
:-" Pursed Lips
:-# Fat Lip / Lips are Sealed / Message concerning something that shouldn't have been said... /
      Moustache / Mum's the word, censored, not talking, shouldn't have said that
:-$ Ill as in sick / Money talks 
:-& Person is angry... / Tongue Tied
:& Tounge tied :-||Angry
:( A frown, something's sad
:( ) Can't Stop Talking
:-( ) You Just Backed Your Car Over My Toe
:-( A frown, something's sad
:'-( Crying Sadly
:( Frown
:-( Frown (anger or displeasure)
:'-( I'm crying 
:-( I'm sad 
-:-( Punk rocker (real punk rockers don't smile)
:-( Sad or disappointed face 
:'-( User is crying
:-(#) Wearing Braces (teeth)
:-(( Very Sad
:-() Big mouth (User has rambled on) / Stubbed my toe / Talking
:-(=) Person has big teeth
:-(=:- Impotent
:-) )-: Masking theatrical comments 
:'-) [Crying for Joy]
:) A smile, don't take it seriously
:-) a smiley face (seen sideways) (used to show humor/sarcasm -indicates- don't take a joke the     
                   wrong way)
:'-) Crying with Joy
:-)' Drooling or Dribbling
:'''-) Floods of Tears :- Male
:-') Has a Cold
:-) I'm happy 
-:-) Punk
:) Smiling, happy faces; don't take me too seriously 
:-) Smiling, happy faces; don't take me too seriously 
:'-) User is so happy s/he is crying
:-)) Very Happy / I have a double-chin 
:-))) Laughing or Double Chin
:-)... I'm drooling 
:)~ Drool
:-)= Vampire
:-)> Bearded
:-)-8 Big Girl
:-)K Bow tie
:-)X Bow Tie
:-)Z Bow tie
:* Kiss
:-* Kiss / Puckering for a kiss / Sorry, I didn't want to say that
:*) Clowning around / Drunk
:-*) Has a Cold
:*) I have a pimple on my nose 
:.-( Weeping
:.-) Laughing Tears
:.) Small-skewed-button-nosed smiley
:-...( I have a runny nose 
:/ Chagrin / Hmmmmmmm / Not too happy about the situation, frown / 
     Perplexed or Skeptical / Undecided
:-/ Hmmmmmmm / Not too happy about the situation, frown / Perplexed or Skeptical / Undecided
::-) Wearing Glasses
:-? Smokes a pipe
:-@ Confused, ill / I'm swearing a blue streak / Screaming
:@ What?
:-@; Screaming
:-\ Undecided
:-] Vampire
:^) From a person with a large nose / Broken Nose / Smiley with a nose 
:`( Crying
:-{ Moustache
:-{#} From a person with braces 
:-{) Moustache
:{) Smile, with moustache
:-{| A Mustache'd person..
:-{} Blowing a Kiss / Wears Lipstick / I have a big mouth
:-| Ambivalent or Expressionless / I'm frowning / Indifference / Monkey
:| when you've wiped that sh*t eatin grin off your face
:-|< Vampire
:-|K- Formal message. 
:-} Wry smile
:~( Weeping
:~/ Mixed Up
:+) Large Nose
:-< Sad / Vampire 
:<) Moustache
:-> Devilish Grin (heavy sarcasm) / Ironic or devious smile / Sarcastic
:> Smiling, happy faces; don't take me too seriously 
:-0 Shocked
:-3 Has Eaten a Lemon
:-6 Exhausted, Wiped Out / Sour Taste in Mouth
:-7 User just made a wry statement / Wry Smile
:8) Pig
:-9 Delicious, Yummy / Licking Lips / Tasty
:-B I have buck teeth / Tongue stuck out
:-C Bummed Out / Pout / Very Unhappy / Jaw hit Floor / Very sad or unhappy
:c) Pig headed
:D Laughing out loud / Licking mouth
:-d Tasty
:D Wider happy face (or Mistrel singers)
:-D Wider happy face (or Mistrel singers) / Big smile, or laughing / Shock or Surprise
:-e Disappointment / :-E Vampire
:-I Indifferent / :-i Smoker
:-II Angry
:-j Smoker Smiling / :-J Tongue in cheek
:-M Speak no evil
:-o "Oh, nooooooo!" (a la Mr. Bill) / I'm yelling/shocked / :-O Big mouth, or talks a lot, or screaming or Mouth Open (Surprised) /:-o Oh Noooo!
:O Shocked
:-o Shouting / :-O Shouting loudly
:O Yell
:o) Boxer's Nose
:P Disgusted (sticking out tongue)
:-p Tongue in Cheek / Tongue stuck out / Wry Smile /  :-P Disgusted (sticking out tongue)
:-Q Smoking / :q Sticking out tongue / Tongue in Cheek / Tongue stuck out / Wry Smile
:-r Tongue stuck out
:-ss drools or has a cold
:-t Cross / :-T Tight Lipped / Trying to keep a straight face
:-V Shouting / :-v Speaking
:-w Speaks with Forked Tongue
:-x kiss / No comment or User's lips are sealed / :-X Kiss/ Mum's the word, censored, 
           not talking, shouldn't have said that / Mute
:-x} Kissing
:-Z Sleeping
;-( A wink
;-) a winking smiley face [for more subtle humor] / Wink (light sarcasm) / 
        Also part of the ichat logo
;) Winking happy faces (something said tongue-in-cheek) 
;-)}<////> Corporate-type guy (see the necktie?) 
;-)=) Grin
;-; Weeping
;-} Leer
;-> Devilish Wink
;> Winking happy faces (something said tongue-in-cheek) 
?-( Black eye
?-) Sorry, I don't know what went wrong
?_? Confused
@ What? / @ @) Your Joking?
@--)--)(-- Rose
@*&$!% You know what that means... 
@:-) From a person with wavy hair / Arab / East Indian 
@-@ Looking innocent(not sure)
@[_]~~ Mug of HOT Coffee or Tea
@= Mushroom cloud
@>--,--- A rose
@->-->-- A rose 
@>--->---- A rose. 
@->-->--> A rose 
[:-) Wearing Headphones
[:-] Robot
[:] Robot :] Friendly, Gleep
[:-I] Robot 
[] Hug
[TM] Trademark
\:-) French Hat
\_/ Glass (drink)
\~/ Full Glass
\-o Bored
]:-) The Devil
^ Thumbs Up
^)^ ^(^ Two People Talking
^^ Smiley (not sideways)
^-^ Smiley (not sideways)
^-^; Sweatdrop on side (nervous)
^_- Wink (not sideways)
^5 High Five
^L^ Happy
-_- Closed eyes ;(
_:^) American Indian
_o-) Aquanaut
{(:-) Wearing a toupee
{:-) Wig
{:V Duck
{} Hug or No comment
| -) I'm sleeping 
|-( Late night messages
|-) Beaming, or happy dreams / Sleeping
|:-) Bushy/Heavy Eyebrows ) Cheshire Cat
|:[' Groucho Marx |I Asleep
|:-| Excessively Rigid
|-] Robocop
|^o Snoring
|-{ Good Grief
|| Car
||* Handshake
||*( Handshake offered
||*) Handshake accepted
|-0 Yawning
|C| Can of Coke
|-I Asleep / sleeping
|-O Yawning / Snoring / Birth
|P| Can of Pepsi
}-& Angry
}:-( Bull Headed
}:-) Mean grin (with eyebrows)
}:-< Cat
}}\/=oo---oo Crash! Lorry after a Crash
~ :-( Particularly Angry
~:-( Net.Flame
'~;E Unspecified 4-Legged Critter
~~:-[ I'm flaming mad 
~~\8-O Needs to Fix Frayed Cord on Computer
~~~\8-O Zapped by Frayed Cord on Computer
~~~~~8} Snake
~~~c___ Beach
~= Candle
~== Flame Follows
~M`'~ Camel
+-(:-) Religious Leader 
+-:-) Religious official, or holds religious office
+<:-) Religious official, or holds religious office / Catholic priest 
+<:-| Nun/Monk
+<||-) Knight
+O:-) Pope @= Message About Nyclear War
<:-) Dumb Question / I'm a dunce
<:-> Devilish
<:>== A turkey 
<:-I Dunce
<|-) Chinese
<eg> Evil grin 
<G> BIG GRIN / <g> small grin
<GD&R> Grinning, ducking & running
<S> BIG SMILE / <s> small smile
<vbg> Very big grin
<veg> very evil grin 
=#:-) Wizard
=) Variation on a Theme
=:-) Hosehead / I just got a mohawk / Shocked
=] smiley for the alternative type person
=|:-)= Uncle Sam
=P~ Sticking your tongue out
>- Female
>-& Angry
>:-( Angry / Frown or Upset or annoyed
>:-) Evil Grin / I'm in a devilish mood 
0:-) Angel / Saint / Smile with Halo
1.0E6 a million [as in TNX 1.0E6]
1^o Snoring
100 Nature Calls/Pit Stop
12x--<---@ A Dozen Roses
12x---<---@ A Dozen Roses
1GL First General Language
1NF First Normal Form 
20 Location 
2B|^2B Message about Shakespeare 
2D Two Dimensional 
2GL Second Generation Language
2NF Second Normal Form 
2nite tonight
2U2 to you too
3:-) Cow / 3 :-) Bart Simpson
3:[ Mean Pet Smiley
3:] Pet Smiley
3:o[ Net.Pets
3ACC 3A Central Control 
3D Three Dimensional 
3DA Three Dimensional Architecture 
3DMF Three Dimensional Metafile Format 
3GL Third Generation Language 
3M Minnesota Mining and Manufacturing 
3NF Third Normal Form 
3WC 3-Way Calling
404 I have no clue (what you get when you enter a wrong URL)
4GL Fourth Generation Language 
4NF Fourth Normal Form 
5:-) Elvis
5NF Fifth Normal Form 
5XBCOER 5 X-bar Central Office Equipment Reports system
6DOF Six Degrees Of Freedom
7:-) Fred Flintstone 8 Infinity
7:) Ronald Reagan
73 Best Regards
8(:-) Walt Disney [] Hugs
8) Frog
8-) Gorilla / Wearing (sun) glasses / Oh boy! Used to denote wide-eyed look ( with a smile ?).
8:-) Little Girl
8^{~< Hair Line, Glasses, Moustache, and Goatee
8-{)} Glasses, Moustache and a Beard
88 Love and Kisses 
A Ampere
A&SG Accessories and Supplies Group
A/C Air Conditioning / Alternating Current 
A/D Analog to Digital 
AA (modem) Auto Answer / Alcoholics Anonymous / Application Association / 
       Associate Advisor / Automatic Adjust 
AAA Aces of ANSI Art / Travel club 
AAAAA American Association Against Acronym Abuse / Travel club for alcoholics 
AAD Analog Alignment Diskette
AAFES Army and Air Force Exchange Service 
AAITP Amdahl Australian Intelligent Tools Program 
AAK Asleep At Keyboard
AAL ATM Adaptation Layer (protocol 1, 2, 3, 4, 5) 
AAMOF As a matter of fact
AAMVANET American Association of Motor Vehicle Administrators N
AAR Automatic Alternate Routing 
AARNET Australian Academic Research Network
AARP AppleTalk Address Resolution Protocol 
AAUI Apple Attachment Unit Interface 
AAX Automated Attendant Exchange
AB ABort session 
AB2 Anarchy Burger ][
ABA American Bankers Association / American Bar Association
ABATS Automated Bit Access Test System
ABBA Anti-Big Brother Association (usually as aBBa) 
ABBS Apple Bulletin Board System
ABC Activity Based Costing / Atanasoff-Berry Computer
ABE Agent Building Environment
ABEC Aracda Backup Executive Agent
ABEX America Online Business Exchange 
ABHC Average Busy Hour Calls
ABHPC Advisory Body on High Performance Computing 
ABIOS Advanced Basic Input / Output System
ABM Asynchronous Balanced Mode 
ABME Asynchronous Balanced Mode Extended 
ABP Alternate BiPolar / Available Bit Rate
ABRC Advisory Board for the Research Councils 
ABS Alternative Billing Service
ABSBH Average Busy Season Busy Hour
ABT ABort Timer / Answer Back Tone 
ABU Application Business Unit
AC Alternating Current / Access Control / AC Acoustic Coupler / AC Air Conditioning / 
  AC Alignment Check / AC Application Context / AC Association Control 
ACA Automatic Circuit Assurance 
ACARB Australian Computer Abuse Research Bureau
ACB Annoyance Call Bureau / Automatic Call-Back
ACBH Average Consistent Busy Hour 
ACC Audio Communications Controller 
ACCE Award for Call Center Excellence 
ACCOLC Access Overload Class
ACCS Automated Calling Card Service
ACD Access Control Definition / Adaptive Call Distributor / Automatic Call Distributor
ACDA Automatic Call Disposition Analyzer 
ACDF Access Control Decision Function 
ACDI Asynchronous Communication Device Interface 
ACE Advanced Computing Environment / Adverse Channel Enhancement / 
  American Council on Education / ACE Ansi Creation Enterprise / ACE Automatic Calling Equipment 
ACEF Access Control Enforcement Function 
ACET Advisory Committee on Electronics and Telecommunicatio
ACF Advanced Communication Function
ACF/NCP Advanced Communications Function / Network Control Pro
ACF/TCAM Advanced Communications Function / TeleCommunications 
ACF/VTAM Advanced Communications Function / Virtual Telecommuni
ACF/VTAME Advanced Communications Function / Virtual Telecommuni
ACH Attempt per Circuit per Hour 
ACI Access Control Information 
ACID ANSI Creators in Demand (usually ACiD) / Atomic/Consistent/Isolated/Durable (test)
       AcidGurl A cute innocent desireable girl
ACK ACKnowledge (ASCII) / Acknowledgement
ACL Access Control List / Advanced CMOS Logic / Association for Computational Linguistics 
ACM Address Complete Message / Association for Computing Machinery
ACMS Application Control Management System
ACN Advisory Committee on Networking / Area Code Number
ACOF Attendant Control Of Facilities 
ACP Access Control Points / Action Point / Allied Communications Publication / Ancillary Control Program 
ACPI Advanced Configuration and Power Interface
ACPM Association Control Protocol Machine 
ACR Abandon Call and Retry 
ACRONYM Abbreviated Coded Rendition Of Name Yielding Meaning 
ACS Access Control Store / Application Control Services / Asynchronous Communications Server / 
      Australian Computer Society / Automatic Class Selection / Automatic Clearing Houses
ACSE Association Control Service Element 
ACSL Association Control Service eLement 
ACSNET Academic Computing Services Network / Australian Computer Science Network 
ACSU Advanced (T-1) Channel Service Unit 
ACT Application Center for Technology
ACTA America's Carriers Telecommunications Association 
ACTAS Alliance of Computer-based Telephony Application Suppl
ACTGA Attendant Control of Trunk Group Access 
ACTLU ACTivate Logical Unit 
ACTPU ACTivate Physical Unit 
ACTS Automated Coin Toll Service / Automatic Coin Telephone System 
ACU Alarm Control Unit / Association of Commonwealth Universities / Automatic Call Unit
ACUTA Association of College and University Telecommunication
AD Activity Discard / Administrative Domain / Authorized Dealers
ADA Activity Discard Acknowledgment / Automatic Data Acquisition (programming language) 
ADAPSO Association of Data Processing Service Organizations 
ADAS Advanced Directory Assistance System
ADB Apple Desktop Bus / AppWare Distributed Bus architecture 
ADC Advanced Data Connector / Analog Digital Converter / Analysis Date Concentrator / 
         Automated Data Collection 
ADCCP Advanced Data Communications Control Procedures
ADCI Automatic Display Call Indicator
ADCP Avesta Device Control Protocol 
ADCU Association of Data Communications Users 
ADD Authorized Digital Dealers
ADDMD Administrative Directory Management Domain 
ADF Access control Decision Function / Automatic Document Feeder 
ADG Authorized Distributor Group
ADI Access control Decision Information / Application DIrectory / Autodesk Device Interface 
ADM Adaptive Delta Modulation / Add-Drop Multiplexer
ADMD Administration Management Domain 
ADN Any day now / Abbreviated Dialing Number
ADO Active Data Objects / ActiveX Data Objects
ADP Active Distribution Panel / Automated Data Processing
ADPCM Adaptive Differential Pulse Code Modulation
ADS Advanced Digital System / Audio Distribution System / Auto Data Switch / Auxiliary Data System
ADSC Adobe Document Structuring Conventions
ADSI Active Directory Services Interface / Analog Display Services Interface 
ADSL Asynchronous Digital Subscriber Line / Asymetric Digital Subscriber Line
ADSP AppleTalk Data Stream Protocol 
ADTS Automated Digital Terminal System
ADU Application Definition Utility / Automatic Duplexing Unit 
ADVFS Advanced File System (usually as AdvFS) 
AE Activity End / Application Entity / ASCii Express
AEA Activity Entity Acknowledgment / American Electronics Association / 
       American Entrepreneurs Association 
AEB Analog Expansion Bus 
AEC Adaptive Echo Cancellation 
AEF Access control Enforcement Function 
AEGIS AIDS Education and General Information Service 
AEI Automatic Equipment Identification 
AEIMP Apple Event Interprocess Messaging Protocol 
AEP AppleTalk Echo Protocol / Application Environment Profile 
AET Application Entity Title 
AF Address Field / Audio Frequency / Auxiliary (carry) Flag 
AFACTS Automated FACilities Test System
AFADS Automatic Force Adjustment Data System
AFAIC As far as I'm concerned / As Far As I Can Tell
AFAIK As Far As I Know 
AFAYC As Far As You're Concerned 
AFC Ansi Factory / Automatic Frequency Control 
AFCP Avesta Flow Control Protocol 
AFDC Aid to Families with Dependent Children 
AFDW Active Framework for Data Warehousing 
AFGO Another F***ing (or Fabulous) Growth Opportunity
AFI AppleTalk Filing Interface / Authority and Format Identifier 
AFII Association for Font Information Interchange 
AFIN Air Force Information Network 
AFIPS American Federation of Information Processing Societie
AFIRM Automated Fingerprint Image Reporting and Match (system)
AFK Away from keyboard
AFNOR Association Francaise de Normalisation 
AFP Advanced Function Printing / AppleTalk File Protocol
AFPA American Forest and Paper Association 
AFRP ARCNET Fragmentation Protocol 
AFS Andrew File System 
AFSK Audio Frequency Shift Keying / Automatic Frequency Shift Keying
AFT Application File Transfer 
AG/EEE Above Ground Electronic Equipment Enclosures
AGA Advanced Graphical Architecture. Also known as AA. The new chipset that was introduced with the A4000 and A1200.
AGBH Average Group Busy Hour 
AGC Automated Gain Control
AGEEE Above Ground Electronic Equipment Enclosures 
AGIS Apex Global Information Services
AGOCG Advisory Committee on Computer Graphics 
AGP Advanced Graphics Port / Accelerated Graphics Port
AGS Asynchronous Gateway Server 
AH Authentication Header
AHDS Arts and Humanities Data Service 
AHT Average Holding Times 
AHUA Association of Heads of University Administrations 
AI Artificial Intelligence / Authentication Information 
AIA Aerospace Industries Association / Application Integration Architecture
AIAG Automotive Industry Action Group 
AIC Automatic Intercept Center
AICC Automatic Intercept Communications Controller
AICPA American Institute of Certified Public Accountants
AIDS Apple Infected Disk Syndrome
AII Active Input Interface 
AIIC As If I Care
AIIM Association for Information and Image Management 
AIM Advanced Interconnect Modeling / Analog Intensity Modulation / Asynchronous Interface Module / 
ATM Inverse Multiplexer 
AIMSX Advanced Information Management System 
AIMUX ATM Inverse Multiplexing
AIN Advanced Intelligent Network
AIOD Automatic Identification of Outward Dialing
AIR Additive Increase Rate / Apple Internet Router 
AIS Alarm Indication Signal / Alarm Indication System / Automated Information System / 
     Automatic Intercept System
AISE Alarm Indication Signal External 
AISI As I See It
AITRC Applied Information Technologies Research Center
AIUI As I Understand It
AIWS As I Was Saying
AIX Advanced Interactive Executive
AK Acknowledge 
AKA Also known as
AKM Apogee Kick Motor
AL Account Librarian (MPE) / Application Layer / Artificial Life
ALAP ARCTalk Link Access Protocol 
ALB Analog LoopBack 
ALBO Automatic Line Build Out
ALC Automatic Level Control
ALFE Analog Line Front End
ALGOL ALGOrhythmic Computer Language
ALI Acer Laboratories, Inc. / Automatic Location Identification
ALIT Automatic Line Insulation Testing
ALIVE Artificial Life Interactive Video Environment
ALM Application Loadable Module / AppWare Loadable Module 
ALO At Least Once 
ALP Abstract Local Primitive 
ALPS Auto Laser Pulse Saving 
ALRU Automatic Line Record Update
ALS Application Layer Structure / Automated List Service
ALT Association for Learning Technology 
ALU Application Layer User / Arithmetic Logic Unit
AM Accounting Management / Active Monitor / Administrative Module / Amplitude Modulation
AM/PSK Amplitude Modulation with Phase Shift Keying 
AMA Automatic Message Accounting
AMACS Automatic Message Accounting Collection System
AMARC Automatic Message Accounting Recording Center
AMASE Automatic Message Accounting Standard Entry
AMAST Algebraic Methodology And Software Technology 
AMAT Automatic Message Accounting Transmitter
AMATPS Automatic Message Accounting TeleProcessing System 
AMATTPS Automatic Message Accounting Transmitter Teleprocessing System
AMC Area Management Center
AMD Advanced Micro Devices / Air Movement Device (aka Fan) 
AME Advanced Metal Evaporative (media) / Asynchronous Modem Eliminator 
AMERITECH American Information Technologies
AMF Account Metering Function 
AMH Application Message Handling 
AMI Alternate Mark Inversion / American Megatrends Inc. / American Microsystems Incorporated
AMIGA A Merely Insignificant Game Addiction
AMII Agile Manufacturing Information Infrastructure 
AMIS Atari Message and Information System / Audio Messaging Interchange Standard 
AMM Agent Management Module / Area Manufacturing Manager
AMON ATM Monitoring
AMP Ampere / Active Monitor Present 
AMPS Abstract Meta-Physical Speculation / Advanced Mobile Phone Service 
AMR Automatic Meter Reading
AMS Access Method Services
AMSP Association of Microsoft Solutions Providers 
AMT Address Mapping Table 
AMU Atomic Mass Unit 
AMVFT Amplitude Modulation Voice Frequency Telegraph 
AMWI Active Message Waiting Indicator
AN Aryan Nations / Associated Number
ANA Automatic Number Announcement
ANBH Average Network Busy Hour 
ANC All Number Calling
ANCS AT&T NetWare Connect Services network 
AND Automatic Network Dialing 
ANE Anarchy 'N' Explosives
ANF Additional Network Feature / AppleTalk Networking Forum 
ANFAWFOS And Now a Word From Our Sponsor
ANFSCD And Now For Something Completely Different 
ANI Automatic Number Identification
ANIF Automatic Number Identification Failure
ANL Argonne National Laboratory
ANM Advanced Network Management 
ANN Announcement Date / Auditing Network Needs 
ANOI A New Order of Intelligence
ANS Advanced Network & Services / American National Standard 
ANSC American National Standards Committee 
ANSI American National Standards Institute
ANTC Advanced Networking Test Center 
AOA Anarchists of America
AOC Advice of Charge 
AOCE Apple Open Collaborative Environment 
AOI Active Output Interface 
AOJ Add one and do not Jump
AOL America Online / Army Of Lamers
AOM Application OSI Management / Area Operations Manager
AOP Association of Online Professionals 
AOS Add One and do not Skip / Alternate Operator Service / Alternate Option Selection 
AOSIP Airline Open Systems Interconnection Profile 
AOSS Auxiliary Operator Service System
AOT Art of Technology
AOTD Art Of Technology Digest (magazine) 
AOV Average Order Value
AOW Asia and Oceania Workshop 
AOWS Asia Oceanic WorkShop 
AP Application Process / Application Profile / Attached Processor
APA All Points Addressable
APANA Australian Public Access Network Association
APC Adaptive Predictive Coding / AMARC Protocol Converter / American Power Conversion / 
        Asynchronous Procedure Call 
APCC American Public Communications Council 
APCI Application - layer Protocol Control Information 
APD Avalanche PhotoDiode 
APDA Apple Programmers and Developers Association 
APDU Application Protocol Data Unit 
APF All PINs Fail 
API American Pirate Industries / Application Program Interface / Application Programming Interface 
APIC Advanced Programmable Interrupt Controller
APL A Programming Language
APLT Advanced Private Line Termination 
APM Advanced Power Management
APP Application / Application Portability Profile 
APPC Advanced Peer to Peer Communication / Advanced Program to Program Communication
APPC/PC Advanced Program-to-Program Communications 
APPI Advanced Program-to-Program Internetworking 
APPIX Automated Part and Product Information Exchange
APPLE Arrogance Produces Profit-Losing Entity
APPN Advanced Peer-to-Peer Network 
APR Automatic Picture Replacement 
APS Application Processing Services / Automatic Protection Switch / 
        Automatic Protection Switching system 
APT Advanced Pirate Technology / American Phone Terrorists
APTS Advanced Public Transportation 
AQS Automatic Quote System
AR Activity Resume / Alarm Report
ARA Apple Remote Access (protocol) / Attribute Registration Authority 
ARAP AppleTalk Remote Access Protocol 
ARB Application Review Board
ARC Advanced RISC Computing / Attached Resources Computing / Ames Research Center / Attached 
       Resource Computer / Attached Resources Computing / Audio Response Controller / Archives
ARCV Association of Really Cruel Viruses
ARD Application Remote Database / Automatic RingDown 
ARDIS Advanced National Radio Data Service 
ARE All Routes Explorer 
ARF Alarm Reporting Function 
ARGO A Really Good Open systems interconnection 
ARI Address Recognized Indicator bit 
ARIES ATM Research & Industrial Enterprise Study
ARIN American Registry for Internet Numbers 
ARIS Audichron Recorded Information System
ARL Access Rights List / Adjusted Ring Length / Attendant Release Loop 
ARLL Advanced Run Length Limited
ARM Advanced RISC Machines / Application Response Measurement (API) / Area Revenue Manager /
        Asynchronous Response Mode 
ARO After Receipt of Order 
ARP Address Resolution Protocol
ARPA Advanced Research Projects Agency
ARPANET Advanced Research Projects Agency NETwork
ARQ Automatic Repeat reQuest
ARR Attributes for Representing Relationships / Automatic Repeat Request 
ARRL American Radio Relay League
ARS Alternate Route Selection / Automatic Route Selection 
ARSB Automated Repair Service Bureau
ART Asynchronous Remote Takeover / Automatic Revision Tracking 
ARTT Asynchronous Remote Takeover Terminal 
ARU Audio Response Unit
ARX AutoCAD Runtime eXtension
AS Activity Start / Anarchy Society / Application System / Autonomous Systems
ASA Advanced SCSI Architecture 
ASACP (Internet) Adult Sites Against Child Pornography 
ASAFP As Soon As Freakin' Possible
ASAI Adjunct Switch Application Interface 
ASAP As soon as possible / Any Service / Any Port
ASB Asynchronous Balanced mode 
ASC Accredited Standards Committee / Authorized Support Centers / Average System Cost / 
        Average System Content
ASCI Accelerated Strategic Computign Initiative
ASCII American Standard Code for Information Interchange / Basic letters and numbers, 
        nothing fancy
ASD Advanced Semiconductor Development
ASDC Abstract Service Definition Convention 
ASDU Application - layer Service Data Unit 
ASE Amplified Spontaneous Emission / Application Service Element 
ASG Advanced Systems Group
ASI Adapter Support Interface / Alternate Space Inversion 
ASIC Application Specific Integrated Circuit
ASID Address Space IDentifier
ASIS American Society for Industrial Security / American Society for Information Science 
ASK Amplitude Shift Keying 
ASL Alpha Systems Laboratories 
ASLIB Association of Librarians 
ASME American Society of Mechanical Engineers
ASMP Asymmetrical Multi-Processing
ASN Abstract Syntax Notation 
ASN.1 Abstract Syntax Notation One 
ASO Application Service Object 
ASOC Administrative Service Oversight Center
ASP Abstract Service Primitive / AppleTalk Session Protocol / 
              Association Of Shareware Professionals / Active Server Page
ASPEN Automatic System for Performance Evaluation of the Network
ASPI Advanced SCSI Programming Interface
ASR Access Service Request / Automatic Send / Receive / Automatic Speech Recognition 
ASSHOLE Away with you lamer
AST Asynchronous System Trap
ASTM American Society for Testing Materials 
ASTRAL Association for Strategic Token Ring Advancement and L
ASV Average System Value
ASYNC Asynchronous transmission 
AT Access Tandem / Advanced Technology / ATtention (modem commands) 
AT&T American Telephone and Telegraph Company
ATA Advanced Technology Attachment / American Telemarketing Association / 
      ARCnet Trade Association / AT Attachment 
ATAPI Advanced Technology Attachment Packet Interface / AT Attachment Packet Interface 
ATAS Analog Test Access System 
ATASPI AT Advanced SCSI Programming Interface 
ATB All Trunks Busy
ATC Allbase Turbo Connect / Automatic Transmission Control
ATD Association of Telecommunications Dealers / Asynchronous Time Division / Authorized Terminal Distributor
ATDM Asynchronous Time Division Multiplexing 
ATDP Attention Dial Pulse 
ATDT Attention Dial Tone 
ATE Asynchronous Terminal Emulation / ATM Terminating Equipment 
ATF Automatic Track Following 
ATH Abbreviated Trouble History
ATI Activist's Times Incorporated / Automatic Test Inhibit
ATIS Advanced Traveler Information Systems / Automatic Transmitter Identification System
ATL Active Template Library
ATLA Another Three Letter Acronym 
ATM At The Moment / Automated Teller Machine / Abstract Test Method / Adobe Type Manager / Asynchronous Transfer Mode
ATMARP Asynchronous Transfer Mode Address Resolution Protocol
ATME Automatic Transmission Measuring Equipment 
ATMP Ascend Tunnel Management Protocol 
ATMS Automated Trunk Measurement System
ATP Available to Promise / All Tests Pass / AppleTalk Transaction Protocol / 
   Application Transaction Processing
ATPS AppleTalk Print Services 
ATQ AppleTalk Transition Queue 
ATR Alternate Trunk Routing
ATRS Automated Trouble Reporting System
ATS Abstract Test Suite / Asian Test Symposium 
ATSE Application Timesharing Software Engineering
ATT Applied Transmission Technologies 
ATTC Automatic Transmission Test and Control Circuit
ATTIS American Telephone and Telegraph Information Systems 
ATV Advanced Television 
AU Access Unit / Adaptive Unit / Administrative Unit 
AUA Association of University Administrators 
AUC AUthentication Certificate 
AUDIX Audio Information Exchange
AUI Attachment Unit Interface / Auxiliary Unit Interface 
AUP Acceptable Use Policy
AURP AppleTalk Update-Based Routing Protocol 
AUT Association of University Teachers
AUTODIN Automatic Digital Network
AUTOSEVCOM Automatic Secure Voice Communications 
AUTOVON Automatic Voice network
AUU ATM User-to-User 
AUXF Auxiliary Frame
AVA Attribute Value Assertion 
AVCS Advanced Vehicle Control Systems 
AVD Alternate Voice Data
AVI Advanced Visual Interface / Audio-Video Interleaved / Automatic Vehicle Identification 
AVL Adelson - Velskii - Landis (programming method)
AVN Ameritech Virtual Network / Automated Voice Network 
AVR Automatic Voltage Regulation / Avid Video Resolution 
AVS Application Visualization System 
AVSSCS Audio Visual Service Specific Convergence Sublayer (AT
AVT Application Virtual Terminal / Architecture Verification Test
AWB Aglets Workbench
AWG American Wire Gauge 
AWGTHTGTATA Are we going to have to go through all this again? 
AWGTHTGTTA Are we going to have to go through this again? 
AWGTHTGTTA? Are We Going To Have To Go Through This Again? 
AWM Advanced Wave Memory 
AWS Administration WorkStation
AWT Abstract Windowing Toolkit / Abstract Windows Toolkit
AXP Almost Exactly Prism
AYA Are you alone?
AYF All Your Fault
AYOR at your own risc 
B Byte / Bearer channel (ISDN) 
B-) Smiling with glasses or sunglasses or wearing cool shades / Horn Rimmed Glasses
B/C Because / b/c because
B/L Backlog
B:-) Sunglasses on Head
B4 Before 
B4N Bye for Now 
B6ZS Bipolar with 6 Zero Substitution 
B8ZS Binary 8-Zero Substitution / Bipolar with 8 Zero Substitution 
B911 Basic 911 
BA British Academy
BAA Broad Agency Announcement 
BAC Basic Access Control 
BACP Bandwidth Allocation Control Protocol 
BAD Broken As Designed 
BAGS Bristol's Anti-Gay Society 
BAI Bank Administration Institute 
BAIK Boy Am I Confused
BAK Back at keyboard
BALUN BALanced / UNbalanced
BAMAF Bellcore Automatic Message Accounting Format 
BAMF Bad Assed Mother F- 
BANCS Bell Administrative Network Communications System / Bell Application Network Control System
BANM Bell Atlantic Nynex Mobil 
BAPCO Bellsouth Advertising & Publishing Company
BAPI Bridge Application Program Interface 
BARRNET Bay Area Research Network
BAS Big A$$ Smile / Basic Activity Subset 
BASC Bad Austrian Swapping Crew
BASIC Bill's Attempt To Seize Industry Control. / Beginner's All-Purpose Symbolic Instruction Code
BAUD Bits At Unit Density (BAUD rate: How fast a modem talks)
BB be back / beavis & butthead / Bad Brains
BB&N Bolt, Beranek & Newman 
BBA Budget By Account 
BBC British Broadcasting Corp. / Broadband Bearer Capability 
BBFN Bye Bye For Now 
BBH Bouncing Busy Hour 
BBIAB Be back in a bit
BBIAF Be back in a few
bbias Be back in a second
BBL Be back later
BBN Bye Bye Now
BBR Burnt Beyond Repair 
BBS Be Back Soon / Bulletin Board System / Bulletin Board Service 
BBSRC Biotechnology and Biological Sciences Research Council (formerly AFRC) 
BBU Battery Back-Up 
BC Blind Copy / Block Check 
BCC Blind Carbon Copy / Blind Courtesy Copy / Block Check Character / Blocked Call Cleared / Boys from Company C
BCD Binary Coded Decimal / Blocked Call(s) Delayed
BCDIC Binary Coded Decimal Interchange Code 
BCDMA Broadband Code Division Multiple Access
B-CDMA Broadband Code Division Multiple Access 
BCG Business Center Group 
BCH Blocked Calls Held 
BCN Beacon 
BCNF Boyce - Codd Normal Form 
BCNU Be seein' you 
BCOB Broadband Class Of Bearer 
BCP Business Communications Project / Byte-Control Protocols 
BCPL Basic Combined Programming Language / Basic Computer Programming Language 
BCR Blocked Calls Released / Business Communications Review
BCS BarCode Sorter / Basic Combined Subset / Batch Change Supplement / Boston Computer Society / 
    British Computer Society / Business Communications Systems 
BCW Burst Code - Word 
BD Back door
BDC Backup Domain Controller 
BDCS Broadband Digital Cross-connect System 
BDE Block Diagram Editor / Borland Database Engine
BDK Beans Development Kit
BDLC Burroughs Data Link Control 
BDN Bell Data Network 
BDR Backup Designated Router 
BDS Black Dragon Society / Building Distribution System 
BDT Berkeley Design Technology / Billing Data Transmitter 
BEC Backward Error Correction 
BECN Backward Explicit Congestion Notation/Notification 
BEDO Burst Extended - Data Out (RAM) 
BEF Band Elimination Filter 
BEG Big Evil Grin
BEITA Business Equipment and Information Technology Association 
BELLCORE BELL COmmunications REsearch 
BER Basic Encoding Rules / Bit Error Rate 
BERKOM BERlin KOMmunikation 
BERT Bit Error Rate Test / Bit Error Rate Tester 
BET Black Entertainment Television 
BETEL Broadband Exchange over Trans-European Links 
BETRS Basic Exchange Telecommunications Radio Service 
BEZS Bandwidth Efficent Zero Support/Suppression 
BF Boy Friend / Bridge Function 
BFD Big F'kin' Deal 
BFF Binary File Format 
BFM Bus Functional Model 
BFN Bye for now 
BFO Blinding Flash of the Obvious
BFT Binary File Transfer 
BG/EEE Below Ground Electronic Equipment Enclosures 
BGA Ball Grid Array
BGEEE Below Ground Electronic Equipment Enclosures 
BGI Borland Graphics Interface 
BGP Border Gateway Protocol 
BGT Broadcast and Group Translators 
BHAW Banging Head Against Wall
BHC Busy Hour Calls 
BHCA Busy Hour Call Attempts 
BHLI Broadband High Layer Information 
BHS Black Hand Society 
BI Backplane Interconnect / Beginning Inventory
BIA Burned - In Address 
BIAS Berkeley Integrated Audio Software / Burroughs Integrated Adaptive System 
BIB Bus Interface Board 
BIBO Beer In, Beer Out
B-ICI Broadband - ISDN Inter-Carrier Interface / Broadband Inter-Carrier Interface 
BICI Broadband Inter-Carrier Interface 
B-ICISAAL Broadband Inter-Carrier Interface Signaling ATM Adaptation Layer 
BICISAAL Broadband Inter-Carrier Interface Signaling ATM Adaptation Layer 
BICMOS Bipolar Complementary Metal Oxide Semiconductor 
BICSI Building Industry Consulting Service International (usually as BiCSi) 
BIDS Bath Information and Data Services 
BIF Basis in fact / Benchmark Interface Format 
BIL Band Interleaved by Line
BIM Basic Industry Marketing 
BIMOS Bipolar Metal Oxide Semiconductor 
BIND Berkeley Internet Name Domain 
BIOS Basic Input / Output System
BIOYA Blow It Out Your A**
BIOYIOP Blow It Out Your I/O Port 
BIP Band Interleaved by Pixel / Bit Interleave Parity 
BIPS Billions of Instructions Per Second 
BIPV Bit Interleaved Parity Violation 
BIRON Bibliographic Information Retrieval Online 
BIS Border Intermediate System (ATM Forum) 
B-ISDN Broadband - Integrated Services Digital Network
BISDN Broadband Integrated Services Digital Network 
BISP Business Information System Program 
BISSI Broadband Inter Switching System Interface 
BIST Built In Self Test 
B-ISUP Broadband ISDN User's Part 
BISYNC Binary Synchronous Communication / Binary Synchronous Control / Bisynchronous Communic 
BIT Basic Information Unit / Binary DigIT (sometimes as bit) / Built In Test 
BITBLT BIT BLock Transfer / Bit-boundry BLock Transfer 
BIT-BLT Bit-boundry BLock Transfer 
BITE Built In Test Equipment 
BITNET Because It's Time NETwork 
BITNIC BITNET Network Information Center
BIU Basic Information Unit / Bus Interface Unit
BIX BYTE Information eXchange 
BJS Bureau of Justice Statistics 
BKERT BlocK Error Rate Tester 
BL Blue Lightning / British Library
BLAH Big Long and Hairy
BLAST Blocked Asynchronous / Synchronous Transmission 
BLCMP Birmingham Libraries Co-operative Mechanisation Project 
BLED Blue Light Emitting Diode 
BLER BLock Error Rate 
BLERT BLock Error Rate Test / BLock Error Rate Tester 
BLF Busy Lamp Field / Busy Line Field 
BLLI Broadband Low Layer Information 
B-LLI Broadband Low Layer Information 
BLNT Broadband Local Network Technology 
BLOB Binary Large OBject 
BLOP Basic Local OPeration 
B-LOP Basic Local OPeration 
BLRDD British Library Research and Development Department 
BLS Business Listing Service 
BLU Basic Link Unit 
BLV Busy Line Verification 
BMA Broadcast Multiple Access 
BMC Basic Monthly Charge / Bulk Mail Center 
BMEWS Ballistic Missile Early Warning System
BMIDE Bus Managed Integrated Drive Electronics
BMOS Bytex Matrix Operating System 
BMP Batch Message Processing (program) / BER Management Protocol / Bitmap (usually as .BMP) 
BMS Banyan Mail Services / Basic Mapping Support 
BMU Basic Measurement Unit 
BN Bridge Number 
BNA Burroughs Network Architecture 
BNC Baynet N-type Compact / Bayonet Navy Connector / Bayonet Nut Connector / 
      Bayonet - Neill - Concelnan / Britsh National Connector
BNF Big Name Fan / Backus-Naur Form 
BNI Batteries Not Included
BNL Brookhaven National Laboratory
BNR Bell National Research
BNS Billed Number Screening 
BNT B-ISDN Network Termination 
B-NT Broadband Network Termination 
B-NT1 B-ISDN Network Termination 1 
B-NT2 B-ISDN Network Termination 2 
BO Buffer (Brain) Overload
BOA Basic Object Adapter / Bill of Aggregation / Blanket Order Agreement
BOC But Of Course / Bell Operating Company 
BOCOEX Boston Computer Exchange (usually as BoCoEx) 
BOD Board Of Directors 
BOF Birds of a Feather (Special Interest Group) / BOF Beginning Of File
BOFH B**tard Operator From Hell
BOI Basic Operators Interface 
BOIS Business Office Information Systems 
BOKYAG Bend Over and Kiss Your A** Goodbye
BOM Beginning Of Message / Bill of Materials
BONDING Bandwidth On Demand InterNetworking Group / Bandwidth ON Demand INteroperability Group 
BONES Block Oriented Network Simulator (usually as BONeS) 
BOO Bill of Organization
BOOTP BOOT Protocol / Bootstrap Protocol 
BOP Bit-Oriented Protocol 
BOPS Billion Operations Per Second 
BOQ Bill of Quantities
BOR Basic Output Report 
BORSCHT Battery,Overvoltage,Ringing,Supervision,Coding,Hybrid,Test
BOS Big Orange Switch (Panic Button) / Business and Office Systems / Business Office Supervisor
BOSE Business and Office Systems Engineering
BOSS Billing and Order Support System 
BOT Back on Topic / Beginning Of Tape / roBOT
BOTE Brothers of the Eye
BOW Brotherhood Of Warez (usually as BoW) 
BPA Business Publications Audit 
BPB BIOS Parameter Block 
BPDU Bridge Protocol Data Unit 
BPF Berkeley Packet Filter
BPFM Business Process Flow Management (system) 
BPI Bits Per Inch 
BPL Bits Per Line
BPM Books Per Minute / Business Planning Manager / Base Product Marketing
BPN Comstar Business Plan
BPNRZ BiPolar Non-Return-To-Zero 
BPOC Bell Point Of Contact 
BPP Bits Per Pixel / Bridge Port Pair 
BPR Business Process Re-engineering 
BPRZ BiPolar Return-To-Zero 
BPS Bits Per Second (usually as bps) / Bytes Per Second (usually as Bps) 
BPSK Binary Phase Shift Keying 
BPSS Basic Packet Switching Service / Bell Packet Switching System 
BPV BiPolar Violation 
BQS Berkeley Quality Software 
BRA Basic Rate Access 
BRAT Business Residence Account Tracking system 
BRATS Business Residence Account Tracking System
BRB Be Right Back 
BRCS Business Residence Custom Service 
BRF Benchmark Report Format 
BRI Basic Rate Interface (ISDN) 
BRIE Berkeley Roundtable on the International Economy 
BRM Basic Remote Module / Business Reply Mail 
BRMAS Business Reply Mail Accounting System 
BRMTP Batch Simple Message Transfer Protocol 
BRP Blade Runner Productions
BRS Big Red Switch (Panic Button) / Bibliographic Research Service 
BS BackSpace (ASCII) / Banded Signaling / Bullsh*t
BSA Basic Service Arrangement / Business Software Alliance/Association
BSBH Busy Season Busy Hour 
BSC Binary Synchronous Communication/Control / Bi-Synchronous Communication / Business Service Center 
BSCM BiSynchronous Communications Module 
BSD Berkeley Software Distribution / Berkeley System Distribution 
BSE Basic Service Elements
BSEG Big Sh*t Eating A Grin
BSF But Seriously Folks / Bell Shock Force 
BSI British Standards Institute 
BSN Broadband Service Node 
BSOC Bell Systems Operating Company 
BSOD Blue Screen Of Death
BSP Bell Systems Practice / Bulk Synchronous Parallelism
BSQ Band SeQuential
BSR Board of Standards Review 
BSRAM Burst Static Random Access Memory 
BSRF Basic System Reference Frequency 
BSRFS Bell System Reference Frequency Standard 
BSS Basic Synchronized Subset 
BST But Seriously though / Basic Services Terminal 
BSTJ Bell System Technical Journal 
BSVC Broadcast Switched Virtual Connections 
BSW Buried Service Wire 
BT British Telecom / Burst Tolerance / Bus Terminator 
B-TA B-ISDN Terminal Adapter 
BTA But Then Again (in response to IOW) / B-ISDN Terminal Adapter 
BTAIM be that as it may 
BTAM Basic Telecommunications Access Method/Message 
BTB Branch Target Buffer 
BTDT Been There, Done That
BTDTGTS Been There, Done That, Got the T-Shirt
BTE B-ISDN Terminal Equipment 
B-TE B-ISDN Terminal Equipment ( 1 or 2 ) 
BTFM Beats the Funk out of Me 
BTFT Been There, Fixed That
BTHOM Beats the hell outta me! 
BTL Bell Telephone Laboratories 
BTM Benchmark Timing Methodology 
BTN Billing Telephone Number
BTP Batch Transfer Program 
BTR Bit Transfer Rate 
BTS Base Transciever Station
BTSOM Beats the sh*t out of me
BTSOOM beats the stuffing out of me - or - Beats The Sh!t Out Of Me
BTU Basic Transmission Unit / British Thermal Unit 
BTW By The Way 
BTWBO Be there with bells on. 
BUBL Bulletin Board for Libraries 
BUC Bus Unit Controller 
BUGS Bloody User Generated Symptoms 
BUS Broadcast and Unknown Server
BVA Billing Validation Application 
BVAPP Billing Verification and Authorization for Payment Process
BVC Billing Validation Center 
BW BandWidth 
BWL Bursting With Laughter
BWM Broadcast Warning Message 
BWQ Buzz Word Quotient
BWT Broadcast Warning TWX 
BWTS BandWidth Test Set 
BYA Bye [of course]
BZT Bundesamt fur Zulassungen in der Telekommunikation 
C Celsius / Centigrade / Committee / Country
C&B Crash & Burn
C&G Chuckle and Grin
C&ISM Consultant and Information Systems Marketing Group
C/SCC (IEEE Computer Society) Computer / Standards Coordinating Committee 
C:-) Big brain
C|:-) Wearing a Bowler Hat
C=:-) Chef 
C4I Command/Control/Comp/Comm/Intel 
C4N ciao for now
CA CAble / Cell Arrival / Certificate Authority / Collision Avoidance / Computer Associates / Computer Animation
CAA Chaotic Ansi Artists
CABS Carrier Access Billing System
CAC Calling-card Authorization Center / Canadian Advisory Committee / Carrier Access Code / 
     Circuit Administration Center / Customer Administration Center / 
     Connection Admission Control / 
CACH Call Appearance Call Handling 
CACHE Can't Admit Computers hang Empty
CACHEKTS Call Appearance Call Handling Electronic Key Telephone Service 
CACP Central Arbitration Control Point
CACS Customer Administration Communication System 
CAD Computer Aided Design/Drafting/Dispatch / Control-Alternate-Delete
CAD/CAM Computer-Aided Design / Computer-Aided Manufacturing 
CADD Computer Aided Design Development 
CADV Combined Alternate Data/Voice 
CAE California Association of Employers / Client Application Enabler (SQL) / 
     Command Application Environment / Common Application Environment / Computer-Aided Engineering 
CAEM Computer Aided Engineering and Manufacturing
CAF Call Attach Facility 
CAFD Controllers Automatic Message Accounting Format Description
CAFM Computer Aided Facilities Management
CAGR Compound Annual Growth Rate 
CAI Call Assembly Index / Common Air Interface / Computer Assisted Instruction 
CAIA Conference on Artificial Intelligence for Applications 
CAIS Collocated Automatic Intercept System
CAL Computer Aided Learning 
CALC CALCulate / Carrier Access Line Charge / Customer Access Line Charge 
CALIM Consortium of Academic Libraries in Manchester 
CALRS Centralized Automatic Loop Reporting System
CALS Computer-aided Acquisition and Logistic Support 
CAM Channel Access Method / Common Access Method Computer Aided Machining/Manufacturing / Computer AIDS Ministries 
CAMA Centralized Automatic Message Accounting
CAN Campus Area Network / Controller Area Network
CAP Carrierless Amplitude and Phase / Competitive Access Provider
CAROT Centralized Automatic Reporting On Trunks
Carrier Access Code / Connection Admission Control
CAS Centralized Attendent Service / Channel Associated Signaling / Circuit Associated Signaling / 
     Column Address Strobe/Select / Communicating Application Specification / 
     Computerized Autodial System / Customer Administrative Services
CASE Common Application Service Element / Computer Aided/Assisted Software Engineering
CASS Coding Accuracy Support System 
CAT Common Authentication Technology / Computer Aided Test / Craft Access Terminal
CATANET Concatanated Network
CATCH Come Again? That Can't Help!
CATLAS Centralized Automatic Trouble Locating & Analysis System
CATNIP Common Architecture for the Internet Protocol 
CATV Cable Television / Community Antenna TeleVision 
CAU Computer Anarchists Underground / Controlled Access Unit 
CAU/LAM Controlled Access Unit / Lobe Attachment Module 
CAV Constant Angular Velocity
CB Citizens Band / Component Broker
CBBS Computerized Bulletin Board System
CBC Cipher Block Chaining
CBD Component Based Development 
CBDB Currency and Banking DataBase
CBDS Connectionless Broadband Data Service 
CBE Certified Banyan Engineer 
CBEMA Computer and Business Equipment Manufacturers' Association 
CBI Computer-based Instruction
CBL Computer Based Learning 
CBM Commodore Business Machines
CBMS Computer - Based Messaging System 
CBO Continuous Bitstream Oriented 
CBPXI Computer Private Branch Exchange Interface
CBQ Class Based Queuing 
CBR Constant Bit Rate / Continuous Bit Rate 
CBS Certified Banyan Specialist / Common Bom System / CrossBar Switching
CBSD Component-Based Software Development 
CBT Computer Based Training
CBX Computerized Branch/Business Exchange
CC Calling Card / Carbon Copy / Central Control / Clearing Center / Cluster Controller / 
   Committee Chairman / Common Control / Connect Confirm / Connection Confirm / Continuity Cell / 
   Controller Card / Cost Center / Country Code / Courtesy Copy / Credit Card / Cryptic Criminals

CCA Conceptual Communications Area 
CCAPH Communications and Computer Applications in Public Health 
CCB Command Control Block
CCBS Completion of Call to Busy Subscriber 
CCC Central Control Complex / Ceramic Chip Carrier / Chaos Computer Club / 
      Clear Channel Capability / Community Computer Center / Computer Control Center
CCD Cash Concentration and Disbursement / Charge-Coupled Device / Customer Configuration Document
CCDN Corporate Consolidated Data Network 
CCEP Commercial Communications Endorsement Program / Commercial COMSEC Endorsement Program 
CCFT Cold Cathode Fluorescent Tube 
CCH Connections per Circuit per Hour
CCH/SP Harmonization Coordination Committee Permanent Secretariat 
CCI Cyber Crime International
CCIA Computer and Communication Industry Association 
CCIC Committee on Computing, Information, and Communications
CCIP (IEEE) Committee on Communications and Information Policy 
CCIR Comite Consultif Internationale de Radiocommunications / International Consultative
CCIRN Coordinating Committee for Intercontinental Research Networks 
CCIS Common Channel Interoffice Signaling 
CCITT Comittéé Consultatif International Telegraphique et Téléphonique (the Consultative Committee on International Telegraphy and Telephony) 
CCM Customer Control Management
CCNC Common Channel Network Controller / Computer Communications Network Center
CCNR Completion of Call on No Reply 
CCNUMA Cache Coherent NonUniform Memory Architecture (usually as ccNUMA) 
CCOO Comprehensive Cost of Ownership
CCP Certified Computing Professional 
CCR Commitment, Concurrency, and Recovery / Current Cell Rate / Customer Controlled Reconfiguration
CCRMA Center for Computer Research in Music and Acoustics 
CCRSE Commitment, Concurrency, and Recovery Service Element 
CCS Calling Card Service / Centum (hundreds) Call Seconds / Common Channel Signaling / Common Command Set / Common Communications Support 
CCS7 Common Channel Signaling
CCSA Common Central Switching Arrangement
CCSS Common Channel Signaling System 
CCSS7 Common Channel Signaling System 7 
CCT Central Control Terminal / CNMA Conformance Testing / Cumulative Cycle Time
CCTA Central Computer and Telecommunications Agency 
CCTAC Computer Communications Trouble Analysis Center
CCTV Closed Circuit Television
CCU COLT Computer Unit
CCUTF Corrupt Computer Underground Taskforce
CCV Calling Card Validation
CD (modem) Carrier Detect / Call Deflection / Capability Data / Compact Disk / 
      Change Directory (DOS) / Collision Detection / Committee Draft / Current Data / 
CDA Call Data Accumulator / Capability Data Acknowledgment / Coin Detection and Announcement / 
    Communications Decency Act / Compound Document Architecture / Crash Dump Analyzer
CDAR Customer Dialed Account Recording
CDC Clark Development Company / Control Data Corporation / Cult of the Dead Cat (Virus) / 
    Cult of the Dead Cow (Text) / Current Data Checking 
CDCCP Control Data Communications Control Procedure 
CDCF Cumulative Discounted Cash Flow
CDCI Cult of the Dead Cat, Inc. 
CDD Common Data Dictionary
CD-DA Compact Disc - Digital Audio
CDDA Compact Disc Digital Audio (red book) 
CD-DA Compact Disc Digital Audio (red book) 
CDDI Copper Distributed Data Interface
CDE Common Desktop Environment 
CDF Channel Definition Format / Combined Distributing Frame 
CDFS CD-ROM File System / Compact Disk File System
CDI Circle Digit Identification / Compact Disc digital Interactive (green book) 
CD-I Compact Disc digital Interactive (green book) 
CDIA Certified Document Imaging Architect
CDIF CASE Data Interchange Format 
CDIP Ceramic Dual In-line Package 
CDM Custom Device Module 
CDMA Code Division Multiple Access
CDO Community Dial Office
CDOE Common Desktop Operating Environment 
CDPD Cellular Data Packet Data / Cellular Digital Packet Data 
CDPR Customer Dial Pulse Receiver
CDR Call Detail Recording / Call Dial Routing
CD-R Compact Disc - Recordable
CDR Compact Disc Reader / Compact Disc Recordable 
CDRAM Cache Dynamic Random Access Memory 
CDRH Center for Devices and Radiological Health 
CD-ROM Compact Disc - Read Only Memory / Consumer Device, Rendered Obsolete in Months
CD-RW Compact Disc - Re-Writable
CDRW Compact Disc Re-Writable 
CDS Cell Directory Service / Circuit Design System / Compound Document Service / Conceptual Data Store / Craft Dispatch System
CDSA Common Data Security Architecture 
CDSL Consumer Digital Subscriber Line
CDT Cell Delay Tolerance 
CDUGD Computer Down UnderGround Digest 
CDV Cell Delay Variation
CDVT Cell Delay Variation Tolerance
CE Consumer Electronics (as in the version of Windows CE) / Communications Entity / Creative Editing
CEB Consumer Electronic Bus
CEC Commission of European Communities 
CEF Cable Entrance Facility
CEI Comparably Efficient Interconnection
CELP Code Excited Linear Predictive Coding 
CEN Comite Europeen de Normalisation (European Committee for Standardization) 
CENELEC Comité Européen de Normalisation Electrotechnique (the European Electrotechnical Standards Committee) 
CEO Chief Executive Officer 
CEP Canon Express Protocol / Connection EndPoint 
CEPI Connection EndPoint Identifier / Comite Europeen des Administrations des Postes et des Telecommunications (European)
CER Cell Error Ratio 
CERFNET California Educational Research Network
CERN Centre de Reseau Nucleare 
CERT Certified Order / Computer Emergency Response Team
CES Circuit Emulation Service / Circuit Emulation Specification / Computer Election Systems
CET Computer - Enhanced Telephony 
CEU Continuing Education Unit 
CEV Control Environmental Vault / Controlled Environment Vault 
CF Carrier Flag / Coin First / Conversion Facility 
CFAC Call Forwarding All Calls 
CFB (K-bit) Cipher Feedback / Call Forwarding Busy / Color Frame Buffer 
CFCA Communications Fraud Control Association
CFD call for discussion
CFM Cubic Feet per Minute
CFNR Call Forwarding No Reply 
CFO Chief Financial Officer
CFP (Conference on) Computers, Freedom, and Privacy 
CFR Code of Federal Regulations
CFU Call Forwarding Unconditional 
CFV Call For Votes/Voting 
CG Chassis Ground 
CGA Color Graphics Adapter
CGCM Certified Graphic Communications Manager 
CGI Common Gateway Interface / Computer Graphics Interface
CGM Computer Graphics Metafile (usually as .CGM) 
CGMIF Computer Graphics Metafile Interchange Format 
CGN Concentrator Group Number
CGS Constructive Solid Geometry (modelers) 
CGSA Cellular Geographic Serving Area 
CHAP Challenge Handshake Authentication Protocol 
CHCP CHange Code Page (Novell DOS) 
CHDIR Change Directory (DOS) 
CHEAD Conference for Higher Education in Art and Design 
CHEST Combined Higher Education Software Team 
CHILL CCITT HIgh Level Language (programming language)
CHINA Communist Hackers In North America
CHIPS Clearing House Interbank Payments System
CHRP Common Hardware Reference Platform 
CHS Cylinder-Head-Sector addressing 
CHT Call Holding Time 
CI Call Intrusion / Cluster Interconnect / Computer Interconnect / Congestion Indicator / 
     Connect Indication / Copy Inhibit 
CI$ Compu$erve Information Service <tm> 
CIA Central Intelligence Agency
CIAO Goodbye
CIB Channel Input/output Bus 
CIBYAD Can I buy you a drink?
CIC Carrier Identification Codes / CSNET Information Center
CICO Coffee In, Coffee Out
CICS Computer Information Control System
CICSPARS Customer Information Control System Performance Analysis Reporting System 
CID Crying In Disgrace
CIDR Classless Inter-Domain Routing
CIE Commission Internationale de l'Eclairaqe / Customer-Initiated Entry 
CIESIN Consortium for International Earth Science Information Network 
CIF Cells In Frames 
CIFS Common Internet File System
CIG Commercial Internet Exchange 
CIGOS Canadian Interest Group on Open Systems 
CII Call Identity Index
CIM - CompuServe Information Manager-The program / Common Information Model / 
       Computer Integrated Manufacturing
CIMAP Circuit Installation Maintenance Access Package 
CIMITI Center for Information Management and Information Technology Innovation 
CIMT Computer Integrated Manufacturing and Technology
CINT Call Interception 
CIO Chief Information Officer
CIP Carrier Identification Parameter / Channel Interface Processor 
CIR Committed Information Rate / Computer Integrated Research
CIRU Computer Industry Research Unit
CIS - CompuServe Information Service / Commercial Instruction Set / Customer Intercept Service /
       Customized Intercept Service 
CISA Certified Information Systems Auditor
CISC Complex Instruction Set Computer/Computing / Complex Instruction Set Code
CISSD Canadian International Society for Social Deviancy
CIT Computer Integrated Telephony
CITTM Corporate Information Technology Training Manager (Council) 
CIU Communications Interface Unit 
CIX Commercial Internet Exchange (Association) 
CKO Chief Knowledge Officer 
CKS Celestial Knights
CL Connectionless 
CLASS Centralized Local Area Selective Signaling / Custom Local-Area Signaling Services 
CLB Common Logic Board 
CLDN Calling Line Directory Number
CLE Customer Located Equipment 
CLEC Competetive Local Exchange Carrier 
CLEI Common Language Equipment Identification
CLI (SQL) Call Level Interface / Calling Line Ident / Command Line Interface 
CLID Calling Line IDentification 
CLIP Calling Line Identification Presentation 
CLIR Calling/Connected Line Identification Restriction 
CLLI Common Language Location Identification
CLLM Consolidated Link-Layer Management 
CLM Career Limiting Move
CLNAP Connectionless Network Access Protocol 
CLNP Connectionless Network Protocol 
CLNS Connectionless Network Services 
CLP Cell Loss Priority / Country List Price
CLR Cell Loss Ratio 
CLS Call Logging System / CLear Screen (DOS, BASIC) / Connectionless Server 
CLSF Connectionless Service Function 
CLSID CLasS Identifier
CLTK CLaim ToKen 
CL-TK Claim Token 
CLTP Connectionless Transport Protocol 
CLTS Connectionless Transport Service 
CLU Command Line Utility 
CLV Constant Linear Velocity
CM Centimeter (usually as cm) / Configuration Management / Cubmaster 
CMA Communication Managers Association 
CMAC Centralized Maintenance and Administration Center
CMAD (Workshop on) Computer Misuse And Detection 
CMAS Central Massachusetts Administrative Services
CMC Carry-in Monthly Charge / Cellular Mobile Carrier / Construction Maintenance Center
CMDF Combined Main Distributing Frame
CMDS Centralized Message Data System
CME Component Management Entity 
CMI Cable Microcell Integrator / Coded Mark Inversion 
CMI/HIC Cable Microcell Integrator / Headend Interface Converter 
CMIIW Correct me if I'm wrong
CMIP Common Management Information Protocol / Common Management Interface Protocol 
CMIPDU Common Management Information Protocol Data Unit
CMIPM Common Management Information Protocol Machine 
CMIS Common Management Information Service 
CMISE Common Management Information Service Element 
CML Current-Mode Logic 
CMM Capability Maturity Model 
CMOS Complementary Metal Oxide Semiconductor(Silicon)
CMOT Common Management information services and protocol Over TCP/IP 
CMP Common Management Protocol / Cooperative Management Protocol / Communications Plenum Cable / 
        Cooperative Marketing Program/Partner
CMR Cell Misinsertion Rate / Communications Riser Cable 
CMS Call Management System / Circuit Maintenance System / Code Management System / 
    Color Management System / Communications Management Subsystem / Conversation Monitor System
CMT Cellular Mobile Telephone
CMU COLT Measurement Unit 
CMYK Cyan, Magenta, Yellow Key / Cyan, Magenta, Yellow, Black 
CN Change Notice / Common Name / Connect / Copy Network / Country Name / 
    Customer Name / Customer Network 
CN/A Customer Name & Address
CNA Certified NetWare Administrator / Certified Novell Administrator / Communications Network Application
CNAB Customer Name - Address Bureau 
CNC Computer Numeric Control / Concentrator 
CNCC Customer Network Control Center
CNCP Canadian National Canadian Pacific 
CNE Certified NetWare Engineer / Certified Novell Engineer / Certified Network Engineer
CNET Centre National d'Etudes des Telecommunications (National Center for the Study of Telecommunications 
CNI Certified NetWare Instructor / Certified Novell Instructor / 
     Coalition for Networked Information / Common Network Interface
CNIP Calling Name Identification Presentation 
CNIR Calling/Connected Name Identification Restriction 
CNM Customer Network Management 
CNMA Communications Network for Manufacturing Applications 
CNMS Cylink Network Management System
CNOS Computer Network Operating System 
CNP... Continued (in my) Next Post / Certified Network Professional
CNR Complex Node Representation (ATM Forum) 
CNRS Centre Nationale de Recherche Scientifique (National Center for Scientific Research) 
CNS Central Nervous System / Certified Novell Salesperson / Complimentary Network Service
CO Call Offer / Central Office / Company / Connection Oriented / Customer Owned 
COA Certificate Of Authenticity / Council Of Administration (usually as CoA) 
COAM Customer Owned and Maintained
COAST Cache On A STick
COBOL COmmon Buisness Oriented Language / Completely Obsolete Business Oriented Language
COC Central Office Connections / Circuit Order Control / Corporate Operations Committee
COCF Connection Oriented Convergence Function 
COCOT Customer Owned Coin Operated Telephone
COD Career Opportunity Days / Cash on Delivery / Connection Oriented Data 
CODASYL Conference of Data Systems Language 
CODCF Central Office Data Connecting Facility
CODE Crackers of Digital Equipment
CODEC Coder / Decoder 
CODEC COder-DECoder / COMpression-DECompression
CODLS COnnection-mode Data Link Service 
COE Central Office Equipment
COEES Central Office Equipment Engineering System
COEM Commercial Original Equipment Manufacturer
COER Central Office Equipment Reports system 
COL Caldera OpenLinux 
COLD Computer Output to Laser Disk 
COLP Connected Line Identification Presentation 
COLT Central Office Line Tester / Client Object Linking Technology 
COM Commercial (usually as .com) / Common Object Model / Component Object Model / 
       Communication (port) / Component Object Model / Computer Output MicroFilm / 
       Continuation Of Message 
COMBS Customer Oriented Message Buffer System 
COMDEX COMmunications Development EXposition
COMM Communication 
COMMA Common Object Methodology Metamodel Architecture
COMPSAC Computer Software and Applications Conference 
COMPUSEC Computer Security 
COMSAT Communications Satellite
COMSEC Communications Security
COMSPEC Command Specifier 
COMSTAR Common System for Technical Analysis & Reporting
CON Central Office News
CON Console 
CONCERT COmmunications for North Carolina Education, Research, and Technology 
CONN Connector
CONP Connected Name Identification Presentation 
CONS Connection Oriented Network Service / COnnection-mode Network Service 
CONTAC Central Office NeTwork ACcess 
CONTACT Central Office Network Access
CONUS Continental United States
COPIS Corporate Planning Information System
COPOL Council of Polytechnic Librarians 
COPP Connection Oriented Presentation Protocol 
COPS Concept Oriented Programming System / Connection Oriented Presentation Service 
COR Confirmation Of Receipt 
CORA Canadian OSI Registration Authority 
CORBA Common Object Request Broker Architecture
CORDIS Community Research and Development Information Service 
CORE Connection Oriented Route Establishment / Criminals of Radical Extremes
COREN Corporation for Regional and Enterprise Networking (usually as CoREN) 
CORISMA Corporate Information Systems Modeling Architecture (usually as CorISMA) 
CORNET CORperate NETwork 
CORP Creators of Revolutionary Pictures
COS Call Originate Status / Class Of Service / Corporation for Open Systems / Cost of Service (usually as CoS) 
CoSAAD Council of Subject Associations in Art and Design 
COSAC Canadian Open Systems Applications Criteria 
COSE Common Open Software/System Environment 
COSHEP Committee of Scottish Higher Education Principals 
COSINE Cooperation for Open Systems Interconnection Networking Europe 
COSMIC COmmon Systems Main InterConnection (frame system)
COSMOS Central System for Mainframe Operations / COmputer System for Mainframe OperationS
COSN Consortium for School Networking 
COSS Common Operational Support Services 
COSSS Committee on Open Systems Support Services 
CoSysOp Co-Systems Operator
COT Central Office Terminal / Central Office Trunks 
COTFLGOHAHA Crawling on the Floor Laughing Guts Out and Having a Heart Attack
COTP Connection Oriented Transport Protocol 
COTS Commercial Off The Shelf 
COUSNS Committee Of UK Subject-based Network Services 
COW Charachter-Oriented Windows (Interface)
CP Collision Prevention / Connect Presentation / Connection Processor / Control Program / 
    Copy Protection / Chat Post (a chat message) / Customer Premises 
CP/M Control Program for Microcomputers / Control Program Master
CPA Centralized/Bulk Power Architecture / Connect Presentation Accept 
CPC Call Progress Characterization / Cellular Phone Company / Circuit Provisioning Center
CPCS Common Part Convergence Sublayer 
CPD Central Pulse Distributor
CPE Consumer Provided Equipment / Customer Premises Equipment
CPFM Continuous Phase Frequency Modulation 
CPH Characters Per Hour / Cost Per Hour 
CPI Characters Per Inch (usually cpi) / Code Page Information (file format) / 
    Common Part Indicator / Common Programming Interface / Computer to PABX Interface / 
    Computer to PBX Interface / Corrupt Programming International
CPIC Common Programming Interface for Communications 
CPI-C Common Programming Interface for Communications 
CPIW Customer Provided Inside Wiring 
CPL Characters Per Line (usually as cpl) / Combined Programming Language / Control Panel Layout / 
    Current Privilege Level / Control Program for Microcomputers / Copies Per Minute / 
    Cost Per Minute 
CPMP Carrier Performance Measurement Plan
CPMU COSINE Project Management Unit 
CPN Calling Party Number 
CPO Corporate Product Operations
CPODA Contention Priority Oriented Demand Assignment 
CPP Calling Party Pays / Corporate Planning Process
CPR Connect Presentation Reject 
CPS Characters Per Second (usually as cps) / Cycles Per Second 
CPSR Computer Professionals for Social Responsibility
CPTWG Copyright Protection Technical Working Group 
CPU Central Processing Unit
CR Carriage Return (ASCII) / Connect Request / Control Register 
CRAFT Can't Remember A F**king Thing 
CRAM Card Random Access Memory / Computational Random Access Memory
CRAP Completely Redundant Array of Pointers (programming) 
CRAS Cable Repair Administrative System
CRBT Crying Real Big Tears
CRC Class, Responsibility, and Collaboration / Customer Record Center / Customer Return Center / 
      Cyclic Redundancy Check / Cyclical Redundancy Checking
CRCG Common Routing Connection Group 
CREF Computer Ready Electronic File (guideline) 
CREG Concentrated Range Extension and/with Gain 
CREN Corporation for Research and Educational Networking
CRF Cable Retransmission Facility 
CRFMP Cable Repair Force Management Plan
CRG Central Resource Group
CRIS Customer Record Information System
CRM Courtesy Reply Mail 
CRN Computer Reseller News
CRQ Call Request 
CRS Cell Relay Service / Centralized Results System / Configuration Report Server 
CRSAB Centralized Repair Service Answering Bureau
CRSO Cellular Radio Switching Office 
CRT Cathode Ray Tube [the video screen]
CRTC Canadian Radio & Television Commission 
CRUD Created, Retrieved, Updated, or Deleted 
CRUS Create / Retrieve / Update / Delete
CS Capability Set (One or Two) / Card Services / Carrier Selection / Code Segment / 
      Convergence Sublayer / Coordinated Single-layer / Customer Service / 
      Cursor Stability (isolation level) 
CSA Canadian Standards Association / Carrier Servicing Area / Confederate States of America / 
    Covenant,Sword,and Arm of the Lord
CSACC Customer Service Administration Control Center
CSAR Centralized System for Analysis Reporting
CSC Cell Site Controller / Computer Sciences Corporation / Customer Support Center / 
     Customer Support Consortium 
C-SCANS Client-Systems Computer Access NetworkS
CSCC (IEEE Computer Society) Computer Standards Coordinating Committee 
CSCW Computer Supported Co-operative Work 
CSD Circuit Switched Data / Corrective Service Diskettes
CSDC Circuit Switched Digital Capability
CSDN Chinese Software Distribution Network / Circuit - Switched Data Network 
CSE Coordinated Single-layer Embedded 
CSELT Cèntro Studi e Laboratòri Telecommunicazioni (Telecommunications Study Center and Labo 
CSFS Cable Signal Fault Signature 
CSG Chuckle Snicker Grin / Corporate Systems Group
CSI Convergence Sublayer Indication 
CSID Calling Station Identification
CSIM Client Side Image Map 
CSL Computer Systems Laboratory 
CSLIP Compressed Serial Line Internet Protocol
CSLT Customized System Load Tape 
CSM Computer Systems Manufacturing / Corrupt Society Magazine
CSMA Carrier Sense Multiple Access 
CSMA/CA Carrier Sense Multiple Access / Collision Avoidance 
CSMA/CD Carrier Sense Multiple Access - Collision Detection 
CSMC Communications Services Management Council 
CSMUX Carrier Switched Multiplexer 
CS-MUX Carrier Switched Multiplexer 
CSN Carrier Service Node 
CSNET Computer and Science (Research) Network / Computer Science Network
CSO Central Services Organization / Complimentary Solutions Organization
CSP Coin Sent Paid / Commerce Service Provider / Compucom Speed Protocol
CSPDN Circuit Switched Public Data Network 
CSPP Computer Systems Policy Project 
CSR Cell Missequenced Ratio / Centrex Station Rearrangement / Customer Service Record / 
      CyberScout Roundtable 
CSR-T Communications Standard Review - Telecommunications 
CSS Cascading Style Sheets / Computer Special Systems / Computer Sub-System / 
       Conceptual Signaling and Status / Controlled Slip Second 
CSSE Computer Services System Engine
CSSFE Controlled Slip Second, Far End 
CSSG Customer Service Solutions Group
CSSM Common Security Services Manager 
CSTA Computer Supported Telecommunications Applications / Computer Supported Telephony Appl
C-STEP Cultural,Societal,Technological,Economic,Political
CSTO Computer Systems Technology 
CSU Channel Service Unit / Careers Services Unit / Central Switching Unit 
CSV Circuit Switched Voice / Comma Separated Values / Common Separated Variables 
CSY Can't Stop Yawning
CT Call Transfer / CT Collection Time / Conformance Testing / Continuous Tone / 
    Current Transformer / Computer Telephony / Current Transformer
CTAK Cipher Text Auto Key 
CTB Cache Transfer Bus 
CTC Canadian Telephone Corporation / Central Test Center
CTCP Client-To-Client-Protocol
CTCS Category Theory and Computer Science 
CTD Cell Transfer Delay
CTERM Command TERMinal (protocol) 
CTI Computer Telephone Integration / Computer Telephony Integration / Computers in Teaching Initiative 
CTIA Cellular Telecommunications Industry Association
CTIP (Commission on) Computing, Telecommunications, and Information Policies 
CTISS Computers in Teaching Initiative Support Service
CTM Contact Trunk Module / Cordless Terminal Mobility 
CTMS Carrier Transmission Measuring System
CTN Corporate Telecommunication Network (With ETSI, the acronym used is CN). 
CTNE Compañia Telefónica Nacional de España (National Telephone Company of Spain) 
CTO Call Transfer Outside / Chief Technology Officer 
CTOS Convergent technologies Operating System
CTP Computer To Plate (technology) 
CTR Currency Transaction Report 
CTRG Collaboration Technology Research Group 
CTS Carpal Tunnel Syndrome (a wrist injury caused by repetitive activity such as typing with bad posture) / 
    Clear to Send / Clear To Send Signal / Communications Technology Satellite / 
    Configuration Technical Specialist / Conformance Testing Service 
CTSLAN Conformance Testing Service Local-Area Network 
CTSS Compatible Time Sharing System / Cray Time Sharing System 
CTSWAN Conformance Testing Service Wide - Area Network 
CTT Cartridge Tape Transport
CTTC Cartridge Tape Transport Controller / Copper To The Curb 
CTTH Copper To The Home
CTTN Cable Trunk Ticket Number
CTTY Console TeleTYpe
CTV Cell Tolerance Variation 
CTY Console TeleType
CU See You (as in Goodbye) Cracking Up / Common Update / Computer Underground / Control Unit / Customer Unit / Computer Underground / 
CUA Commonly Used Acronym(s) / Common User Access 
CUB Closed User Group 
CUCO Commission on University Career Opportunity
CUCRIT Capital Utilization Criteria
CUD Celerity Utilities Division / Computer Underground Digest
CUG Closed User Group 
CUHS Computer Underground Historical Society 
CUI Centre Universitaire d'Informatique / Common User Interface 
CUL Catch You Later (Goodbye) / See you later
CUL(8R) see you later
CUL8er See You Later 
CUL8R See you later 
CUM Cult of the Uncircumcised Masturbater
CUNT yeah yeah - real funny - get lost
CUNY City University of New York
CURL Consortium of University Research Libraries (UK)
CUSI Configurable Unified Search Interface 
CUT Control Unit Terminal
cuz because
CV Code Violation 
CVAL&E Computer Viruses, Artificial Life, and Evolution
CVALE Computer Viruses, Artificial Life, and Evolution
CVCP Code Violation, CP-bit Parity / Committee of Vice-Chancellors and Principals 
CVCRC Code Violation, Cyclical Redundancy Check 
CVDQ Computer Virus Developments Quarterly 
CVF Compressed Volume File
CVFE Code Violation, Far End 
CVO Commercial Vehicle Operation 
CVP Code Violation, "P" bit 
CVPR Computer Vision and Pattern Recognition 
CVR Compass Voice Response
CVSD Continuous Variable Slope Delta (modulation) 
CVTC Conversational Voice Technologies Corporation 
CW Call Waiting / Continuous Wave / Cyber Warriors
CWARC Canadian Workplace Automation Research Center 
CWC City-Wide Centrex 
CWD Call Waiting Deluxe
CWI Centrum voor Wiskunde en Informatica (Center for Mathematics and Information) 
CWIS Campus Wide Information System 
CWT Call Waiting
CWYL Chat With You Later
CYA See Ya / Cover Your As*
CYAL8R See You Later (Seeyalata)
CYBORG CYBernetic ORGanism
CYMK Cyan Yellow Magenta Key
CYREC Cyberspace Research and Education Center
D Data channel (ISDN) 
D&C Duck & Cover
D/A Digital to Analog / Digital-Analog
D/L Download, transmit to you 
d:-) Wearing a Cap
d00d dude
D2T2 Dye Diffusion Thermal Transfer
DA Data Available / Desk Accessory / Destination Address / Digital Audio / Directory Assistance 
DAA Data Access Arrangement 
DAAC Distributive Active Archive Center 
DAC Digital Analog Converter / Dual Attachment Concentrator 
DACC Directory Assistance Call Completion 
DACD Directory Access Control Domain 
DACS Digital Access Cross-connect System / Directory Assistance Charging System 
DAD Draft Addendum 
DADC Digital Audio Disc Corporation 
DAEMON Disk And Execution Monitor 
DAF Directory Authentication Framework 
DAG Defense Agencies Group 
DAIS Distributed Automatic Intercept System 
DAK Data Acknowledge / Dead At Keyboard
DAL Data Access Language / Data Access Line 
DALNET DA Lamers Net
DAM Data Access Manager 
DAMA Data Assigned Multiple Access / Demand Assigned Multiple Access 
DAMIFINO Damn if I know
DAMP Demand Analysis Manufacturing Planning
DAN Departmental Area Network 
DAO Data Access Object / Directory Assistance Operator 
DAP Data Access Protocol / Directory Access Protocol / Document Application Profile 
DARC Division Alarm Recording Center 
DARFC Ducking And Running For Cover 
DARPA Defense Advanced Research Projects Agency 
DART Data Access and Retrieval Technologies (group) 
DARTNET Defense Advanced Research Testbed Network (usually as DARTnet) 
DARU DAIS Audio Response Unit / Distributed Automatic Response Unit
DAS Device Access Software / Directory Assistance System / Disk Array Subsystem / 
    Distributor And Scanner / Dual Attachment Station / Dynamically Assigned Sockets 
DASD Direct Access Sotrage Device
DASH Dell Advanced SCSI Host 
DASP Digital Assisted Services Program
DASS Design Automation Standards Subcommittee 
DAS-WAT Distributor And Scanner - Watch Dog Timer
DASWDT Distributor And Scanner Watch Dog Timer 
DAT Digital Audio Tape / Digital Audio Tap / Duplicate Address Test 
DATAEASE Doesn't always terminate after exiting and slows everything / 
          Don't attempt to aquire, everything always shows errors
DATTA District Attorneys' Technology Theft Association 
DATU Direct Access Testing Unit
DAV Data Above Voice 
DAVE Do Anything Very Easily 
DAVID Digital Audio-Video Interactive Decoder
DAX Developer API eXtensions 
DB Database / Decibel (usually as dB) 
DBA Adjusted Decibel / Data Base Administrator / Digital Business Architecture / 
        Doing Business As
DBAC Data Base Administration Center
DBAS Data Base Administration System
DBC Data Base Creator / Digital Business Center 
DBCS Double - Byte Character Set 
DBF Dynamic Beam Forming 
DBIT Delivery (confirmation) Bit 
DBL DOS Batch Language
DBM DataBase Manager / Decibels per Milliwatt (dBm)
DBMS Data Base Management System
DBN Doing Business Not
DBOD Distribution Board of Directors 
DBR DOS Boot Record
DBS DataBase Service / Demand Broadcast System / Direct Broadcast Satellite / 
    Duplex Bus Selector 
DBTG DataBase Task Group 
DBX Digital Branch Exchange 
DC (modem) Data Compression / Data Cartridge / Direct Current / Disconnect Confirm 
DCA Defense Communications Agency / Digital Communications Associates, Inc. / 
     Document Content Architecture 
DCAA Dual Call Auto Answer 
DCAM Distributed Computing Application Management 
DCASR Defense Contract Administration Services Region
DCB Data Control Block / Directory Cache Buffer 
DCC Direct Client to Client / Data Collection Computer / Data Communications Channel / 
       Data Country Code / Digital Compact Cassette / Digital Customer Center / 
       Direct Cable Connection 
DCD Data Carrier Detect (signal) 
DCE Data Circuit Terminal Equipment / Data Circuit-terminating Equipment / 
    Data Communications Equipment / Distributed Computing Environment
DCEC Defense Communications Engineering Center 
DCE-RPC Distributed Computing Environment Remote Procedure Call 
DCF Data Communications Function 
DCH D Channel Handler 
DCI Display Control Interface 
DCIU Data Communications Interface Unit 
DCL Data Control Language / Digital Command Language 
DCLU Digital Carrier Line Unit 
DCM Digital Carrier Module 
DCMS Distributed Call Measurement System 
DCMU Digital Concentrator Measurement Unit 
DCN Data Communications Network / Declaration Control Number 
DCO-CS Digital Central Office-Carrier Switch
DCOM Distributed Component Object Model
DCP Demand for Critical Parts / Device Color Profile / Digital Communications Protocol / Duplex Central Processor 
DCPR Detailed Contuing Property Record (PICS/DCPR) 
DCPSK Differential Coherent Phase Shift Keying 
DCR Direct Current Resistance 
DCS Data Circuit Switches / Defined Context Set / Desktop Color Separation / Desktop Color System / 
    Digital Communication System / Digital Cross-connect System / Distributed Computing System 
DCSS Digital Customized Support Services / Discontiguous Shared Segments
DCT Digital Carrier Trunk 
DCTN Defense Commercial Telecommunications Network 
DCTS Dimension Custom Telephone Service 
DCU Digital Credit Union
DD Data Definition / Definition Description (HTML) / Depacketization Delay / Double Density
DDA Disk Drive Adaptor / Domain Defined Attribute 
DDAP Digital Distribution of Advertising for Publications 
DDB Distributed DataBase 
DDBMS Distributed DataBase Management System 
DDC Direct Department Calling / Direct Distance Calling 
DDCF Distributed Document Component Facility 
DDCMP Digital Data Communications Messaging Protocol 
DDD Digital Diagnostic Diskette / Direct Distance Dialing 
DDE Dynamic Data Exchange
DDEML Dynamic Data Exchange Management Library 
DDF Data Description File 
DDFA DTC Device File Access (Utilities) 
DDFII Data Description File for Information Interchange 
DDGL Device Dependent Graphics Layer 
DDH Digital Distributed Hardware 
DDI Direct Dialing In 
DDial Diversi-Dial 
DDIF Digital Document Interchange Format 
DDK Device Driver Kit 
DDL Data Definition Language / Data Description Language / Database Definition Language / Database Description Language / Dynamic Data Link
DDM Distributed Data Management 
DDN Defense Data Network / Defense Department Network 
DDN-NIC Defense Data Network Network Information Center 
DDOV Digital Data Over Voice 
DDP Datagram Delivery Protocol / Direct Distribution Panel / Distributed Data Processing 
DDR Data descriptive Record 
DDS Dataphone Digital Service / Digital Dataphone Service / Digital Data Service / 
    Digital Data System / Digital Data Storage / Digital Distributed Software / 
    Document Distribution Service 
DDT Don't Do That / DEC Debugging Tape / Dynamic Debugging Tool
DDVT Dynamic Data Visualization (development) Tool 
DDX Distributed Data eXchange 
DE Discard Eligibility/Eligible
DEA Data Encryption Algorithm / Drug Enforcement Agency 
DEB Directory Entry Block 
DEBI DMA Extended Bus Interface
DEBIES DDAP Electronic Business Information Exchange Specification 
DEC Do Expect Cuts / Digital Equipment Corporation 
DECDNS Digital Equipment Corporation Distributed Name Service (usually as DECdns) 
DECDTM Digital Distributed Transaction Manager
DECMCC Digital Equipment Corporation Management Control Center (usually as DECmcc) 
DECNET Digital Equipment Corporation Network architecture (usually as DECnet) 
DECNMS Digital Network Measurement System
DECT Digital European Cordless Telephone 
DECTP Digital Transaction Processing
DECUS Digital Equipment Corporation User's Society
DEF Direct Equipment Failure 
DEK Data Encryption Key 
DEL Delete (DOS) 
DEMPR Digital Equipment Corporation MultiPort Repeater 
DEN Digital Echo News
DENI Department of Education for Northern Ireland 
DEPBA Digital Exchange Pirate Board Alliance 
DER Distinguished Encoding Rules 
DERP Defective Equipment Replacement Program 
DES Data Encryption Standard / Defense Encryption Standard / Destination End System / 
    Digital Encryption Standard / Distributed End System 
DES-CBC Data Encryption Standard - Cipher Block Chaining 
DESIRE Directory of European Information Security Standard Requirements 
DET Directory Entry Table 
DETLA Double Extended Three Letter Abbreviation 
DEU Dead - End User 
DEW Distant Early Warning (line) 
dewd dude
DF Direction Flag / Distributing Frame 
DFA Design For Assembly 
DFD Data Flow Diagram 
DFDSS Data Facility DataSet Services
DFEP Diagnostic Front End Processor 
DFG Data Flow Graph 
DFHSM Data Facility Hierarchical Storage Manager
DFI Digital Facility Interface 
DFL Distributed Feedback Layer 
DFLA Damn Four Letter Acronym 
DFM Design For Manufacturing 
DFMS Digital Facility Management System 
DFN Deutsches Forschungsnetz 
DFP Digital Free Press / District Focus Person 
DFR Document Filing and Retrieval 
DFS Distributed File Service / Distributed File System
DFSK Differential Frequency Shift Keying 
DFSMS Data Facility Sotrage Management Subsystem
DFT Design for Test(ing) / Distributed Function Terminal 
DFWMAC Distributed Foundation Wireless Medium Access Control 
DGITA Digital Graphic Imaging Technical Association (previously SGAUA) 
DGPS Differential Global Positioning System 
DG-UX Data General UniX
DH Dear Husband (also Dear Hubby, Duh Hubby and of course Dick Head)
DHA Destination Hardware Address 
DHCP Dynamic Host Configuration Protocol
DHHS Department of Health and Human Services 
DHT Directory Hash Table 
DHTML Dynamic HyperText Markup Language
DI Delete Inhibit / Destination Index
DIA Defense Intelligence Agency / Document Interchange Architecture 
DIAC Directions and Implications of Advanced Computing 
DIAFYO Did I Ask For Your Opinion
DIAG Datasets Inter Agency Group 
DIAL Digital Idle Asset Listing 
DIB Device Independent Bitmap (graphic format) / Directory Information Base 
DIBI Device Independent Backup Interface 
DIBOL DIgital Business Oriented Language 
DIC Digital Interface Controller 
DICE Digital Interactive Consumer Electronic (machines)
DID Destination ID / Direct Inward Dialing 
DIDC Data Input and Distribution Card 
DIF Data Interchange Format / Digital Interface Frame / Documentation Interchange Format 
DIFMOS Double Injection Floating-gate Metal Oxide Semiconductor
DIGEST Digital Electronic Signature Test (usually as DigEST) 
DIGI Deutsche Interessengemeinschaft Internet (German Special Interest Group for Internet) 
DIGL Device Independent Graphics Layer 
DIIG Digital Information Infrastructure Guide
DIIK Damned If I Know 
DILLIGAD Do I look like I give a darn?! 
DILLIGAF Do I look like I give a f*#k?! 
DILLIGAF? Do I look like I give a F#%k?
DILLIGAFF Do I look Like I give a Flying Figment?
DIM Data In the Middle / Demand Integration Meeting / Desktop Information Manager 
DIMA Data Information Management Architecture 
DIMM Dual In-line Memory Module
DIN Deutsche Industrie Norm / Deutsche Ingineering Normilization / Deutsches Institut fur 
DINS Digital Information Network Service 
DIP Dual In-Line Package
DIPE Distributed Interactive Processing Environment 
DIR Directory (DOS) 
DIS Defense Investigative Service / Digital Information Systems / Draft International Standard /
    Dynamic Impedence Stabalization
DISA Data Interchange Standards Association / Defense Information Systems Agency / 
     Direct Inward Switch Access / Direct Inward System Access 
DISER Digital Information Systems External Resources 
DISERF Data Interchange Standards Education and Research Foundation 
DISN Defense Information Systems Network 
DISOSS DIStributed Office Support System
DISP Directory Information Shadow Protocol 
DIT Directory Information Tree 
DITUIHIBMSL Did I Tell You I Hate IBMs Lately
DITUILIBMSL Did I Tell You I Love IBMs Lately
DIU Digital Interface Unit 
DIW D-Inside Wire 
DIX DEC - Intel - Xerox (connector) 
DIZ Description In Zip 
DJNR Dow Jones News Retrieval (online service) 
DL Download / Data Link / Definition List / Den Leader / Direct Labor / Distribution List
DLAMLT Don't look at me like that!
DLC Data Link Control / Distributed Loop Carrier / Digital Loop Carrier
DLCF Data Link Control Field 
DLCI Data Link Connection Identifier/Identification
DLCU Digital Line Carrier Unit 
DLE Data-Link Escape (ASCII) 
DLL Data Link Layer / Dial Long Lines / Dynamic Link Library
DLM Data Line Monitor / Distributed Lock Manager
DLN Digital Library Network 
DLO Data Line Occupied 
DLOC Dark Lords Of Chaos
DLP Digital Light Processing 
DLPI Data Link Provider Interface 
DLS Data Link Services / Dial Line Service / Digital Link Service / Document Library Services 
DLSAP Data Link-layer Service Access Point 
DLSDU Data Link-layer Service Data Unit 
DLSW Data Link SWitching (usually as DLSw) 
DLT Digital Linear Tape
DLTBBB Don't Let The Bed Bugs Bite
DLTU Digital Line - Trunk Unit 
DLU-PG Digital Line Unit - Pair Gain
DLUPG Digital Line Unit Pair Gain 
DLVA Detector Logarithmic Video Amplifier
DM Dead Memory / Delta Modulation / Dimension Modeling / Disconnected Mode / Distributed Management 
DMA Direct Memory Access (channel) 
DMCL Digital Modem Command Language 
DMCR Debug Mode Control Register
DMD Directory Management Domain 
DMDD Distributed Multiplexing Distributed Demultiplexing 
DME Digital Management Education / Distributed Management Environment 
DMF Distributed Management Framework / Distribution Media Floppy / Distribution Media Format 
DMI Definition of Management Information / Desktop Management Interface / Digital Multiplexed Interface 
DML (SQL) Database Manipulation Language / Data Manipulation Logic
DMM Digital Multi-Meter / District Manufacturing Manager 
DMO (SQL) Distributed Management Objects / Domain Management Organization 
DMOS Diffusion Metal Oxide Semiconductor / Double-diffused Metal Oxide Semiconductor
DMPDU Derived Medium access control Protocol Data Unit 
DMS Data Management System/Services / Defense Messaging System / Digital Multiplex(ed) Switch/System / Diskless Management Service 
DMSS Distribution, Marketing, Sales and Service
DMT Design Maturity Test / Discrete MultiTone
DMTF Desktop Management Task Force
DMU Data Manipulation Unit 
DN Directory Number / Distinguished Name / Distribution Network / Domain Name / Down 
DNA DEC Network Architecture / Defense Nuclear Agency / Digital Named Accounts / 
     Digital Network Architecture / Digital News Associates / Digital Noise Alliance / 
     Distributed Network Architecture / Deoxyribonucleic acid 
DNC Dynamic Network Controller 
DND Do Not Disturb 
DNDO Do Not Disturb Override 
DNDS Distributed Network Design System 
DNHR Dynamic Non-Hierarchical Routing 
DNIC Data Network Identification Code 
DNIS Dialed Number Identification Service 
DNP Distributed Network Processing 
DNPM Darn (Damn) Near Pis*ed Myself
DNR Data Network Routing / Dialed Number Recorder / Digital Number Recorder
DNS Domain Name Service / Domain Naming System / Domain Name System / Domain Name Server
DNX Dynamic Network Cross-Connect (X-connect)
DO Distributed Object
DOA Dead On Arrival / Distributors Of Anarchy 
DOAM Distributed Office Applications Model 
DOC Department of Communications (in Canada) / Document, 3. Dynamic Overload Control / 
     Dynamic Overload Control 
DOCS Display Operator Console System 
DOD Department of Defense / Direct Outward Dialing 
DOE (U.S.) Department Of Energy / Department of Energy
DOI Distributed Object Infrastructure 
DOJ Department of Justice 
DOM Data On Master (group) / District Operations Manager 
DOMF Distributed Object Management Facility 
DOMS Distributed Object Management System 
DOMSAT Domestic Satellite (service) 
DON Department Of the Navy 
DONACS Department Of the Navy Automation and Communication System 
DOP Directory Operational Protocol 
DORK Domestic Organization for Real K????
DOS Defective Operating System / Disc Operating System
DOSBS Data Over Speech Bearer Service 
DOT (U.S.) Department Of Transportation 
DOTS Digital Office Timing Supply 
DOV Data Over Voice 
DOW Direct Over-Write (technology) 
DP Data Processing / Demarcation Point / Dial Pulse / Draft Proposal / Dial Pulse
DPA Demand Protocol Architecture / Distributed Power Architecture / Document Printing Application 
DPAC Dedicated Plant Assignment Center 
DPAM Demand Priority Access Method
DPANS Draft Proposed American National Standard (usually as dpANS) 
DPB Drive Parameter Block 
DPC Data Processing Center / Deferred Procedure Call / Destination Point Code / Direct Program Control 
DPCM Differential Pulse Code Modulation 
DPE Data Path Extender 
DPG Dedicated Packet Group 
DPI Dot Pitch Integer / Dots Per Inch
DPL Dedicated Private Line 
DPLL Digital Phase Locked Loop 
DPM Data Processing Manager 
DPMA Data Processing Management Association
DPMI DOS Protected Mode Interface
DPMS Display Power Management Signaling / DOS Protected Mode Services
DPNPH Data Packet Network - Packet Handler 
DPN-PH Data Packet Network - Packet Handler 
DPO Dial Pulse Originating 
DPP Discounted Payback Period / District Partner Program 
DPSC Defense Personnel Support Center 
DPSK Differential Phased Shift Keying
DPSS (Los Angeles County) Department of Public Social Services 
DPSWG Digital Privacy and Security Working Group 
DPT Dial Pulse Terminating / Distributed Processing Technology
DQDB Distributed Queue Dial Bus 
DQL DataEase Query Language 
DQT Design Quality Test 
DR Data Ready / Data Receive / Delivery Report / Digital Research / Disconnect Request 
DRAM Dynamic Random Access Memory
DRC Data Resource Center 
DRDA Distributed Relational Database Architecture / Access 
DR-DOS Digital Research Disk Operating System 
DREF Distribution Research and Education Foundation 
DRMU Digital Remote Measurement Unit 
DRN Data Routing Network 
DROOL Dave's Recycled Object - Oriented Language 
DRP DECnet Routing Protocol / Directory Replication Protocol / Distribution Resource Planning 
DRPF Decimal Reference Publication Format 
DRS Data Rate Selector 
DRT Digital Real Time 
DS Data Segment / Data System / Digital (carrier) Span / Digital Service / 
      Directory Service / Direct Signal / Digital Signal (level 0 - 3) / 
      Digital Stream (1, 1C, 2, 3, 4) / Diskless Support / Distributed Single-layer / 
      Document Storage / Double-Sided / Draft Standard / Dual Scan / 
      Dansk Standardiseringsrad (Danish Board for Standardization) / Digital Carrier Span
DS/DD Double Sided / Double Density 
DS/HD Double Sided / High Density 
DS0 Digital Signal (level) Zero
DSA Decimal Shift and Add (algorithm) / Dedicated Switched Access / Destination Software Address / 
    Digital Storage Architecture / Decimal Shift and Add (algorithm) / Directory Service Agent / 
    Directory System Agent / Directory Service Area / Directory System Alert / 
    Distributed Systems Architecture
DSAD Digital Storage Architecture for Disk 
DSAP Data link Service Access Point / Destination Service Access Point 
DSAT Digital Storage Architecture for Tape 
DSB Double SideBand 
DSBAM Double-SideBand Amplitude Module
DSBFC Double SideBand Full Carrier 
DSBSC Double SideBand Suppressed Carrier 
DSC Data Stream Compatibility / Direct Satellite Communications / Document Structuring Conventions 
DSD Data Structure Definistion / Distributed Self Discovery 
DSDC Direct Service Dial Capability 
DSDF Digital Standard Disk Format 
DSDS Dataphone Switched Digital Service 
DSE Data Switching Equipment / Distributed Single-layer Embedded / Distributed System Environment / DSA Specific Entry 
DSI Data Subscriber Interface / Digital Speech Interpolation
DSID Destination Signaling IDentifier 
DSIN Digital Software INformation 
DSL Digital Subscriber Line
DS'L Doctor Stein's Laboratories 
DSLA Digital Software Licensing Architecture 
DSLAM Digital Subscriber Line Access Multiplexer
DSLO Distributed System License Option 
DSM Diagnostic System Manager / Digital Standard MUMPS / Distributed Switching Matrix / 
      Distributed Systems Manufacturing / District Sales Manager 
DSMA Digital Sense Multiple Access 
DSMC Digital Service Monthly Charge 
DSN Data Source Name / Defense Switched Network / Digital Services Network / 
    Digital Signal (Level) N 
DSO Days Sales Outstanding / Digital Storage Oscilloscope 
DSOM Distributed System Object Model 
DSP Defense Standardized Profit / Digital Signal Processor / Directory System Protocol / Domain Specific Part 
DSPU DownStream Physical Unit 
DSR Data Send/Set Ready / Date Set Ready / Dynamic Service Register 
DSRI Digital Standard Relational Interface 
DSS Data Station Selector / Decision Support System / Digital Satellite System / 
     Digital Signal Standard / Digital Signature Standard / Digital Subscriber Service / 
     Digital Subscriber Signaling / Direct Station Selection / Distributed Security Service 
DSS/BLF Direct Station Selection / Busy Lamp Field 
DSS1 Digital Subscriber Signaling (system No.) 1 
DSSI Digital Small Storage Interconnect / Digital Storage Systems Interconnect 
DSSSL Document Style, Semantics, and Specification Language 
DSTAR Digital System Technical Architecture Research 
DSTP Data Source Transfer Protocol 
DSU Data Service Unit / Digital Service Unit 
DSUWG Data Systems Users Working Group
DSVD Digital Simultaneous Voice and Data 
DSV-IS Design, Specification and Verification of Interactive Systems 
DSVIS Design, Specification and Verification of Interactive Systems 
DSX Digital Signal Cross-Connect (X-Connect)
DT Data Transfer / Data Transmit / Definition Term / Detection Threshold / Dial Tone / Di-group Terminal 
DT&E Development Test and Evaluation 
DTA Disk Transfer Area
DTAM Document Transfer, Access, and Manipulation 
DTAS Digital Test Access System 
DTC Data Technology Corporation / Datacommunications and Terminal Controller / Digital Trunk Controller / Di-group Terminal Controller / Distributed Transaction Coordinator
DTD Document Type Definition
DTDS Disaster Tolerant Disk Systems 
DTE Data Terminal Equipment
DTF Dial Tone First 
DTFS Direct Tape File System 
DTG Direct Trunk Group 
DTI Dark Towers International / Department of Trade and Industry / Digital Trunk Interface 
DTIF Digital Tabular Interchange Format / Digital Transmission Interface Frame 
DTMF Dual Tone Modulation Frequency / Dual-Tone-Multi-Frequency 
DTN Digital Telephone Network 
DTP DeskTop Publishing / Distributed Transaction Processing 
DTR Data Terminal Ready (signal) / Dedicated Token Ring / Draft Technical Report 
DTRT Do The Right Thing 
DTS Data Transfer System / Deposit Tracking System / Digital Termination Service/System / 
    Digital Transcoding Switch / Digital Transmission System / Distributed Terminal Subsystem / 
    Distributed Time Service 
DTST Dial Tone Speed Test 
DTSX Data Transport Station for X.25 
DTU Di-group Terminal Unit 
DTV Desktop Video
DU Data Unit 
DUA Dallas Underground Association / Directory User Agent 
DUART Dual Universal Asychronous Receiver Transmitter 
DUCWIC Do You See What I See?
DUCWIM Do You See What I Mean?
DUHWIH Do You Hear What I Hear?
DUN Dial-Up Networking
DUSR Digital Authorized Used Systems Resellers 
DUV Data Under Voice 
DUX Digital Voice eXchange 
DV Digital Video
DVB Digital Video Broadcasting
DVC Digital Video Cassette / Digital Video Conference
DVD Digital Versatile Disk / Digital Video Disk
DVDROM Digital Versatile Disk Read Only Memory 
DVD-ROM Digital Versatile Disk Read Only Memory 
DVE Digital Video Effects 
DVI Digital Video Interactive/Interleaved 
DVM Data Voice Multiplexor 
DVMRP Distance Vector Multicast Routing Protocol
DVN Digital Video Network 
DVT Design Verification Test 
DVX Digital Voice Exchange
DW Data Warehousing 
DWCI DecWindows Compiler Interface 
DWI Doc Writers Incorporated
DWIM Do What I Mean 
DWIMC Do What I Mean, Correctly 
DWISNWID Do What I Say Not What I Do
DXC Digital Cross-Connect 
DXF Data eXchange Format (graphic format) 
DXI Data eXchange Interface
DYJHIW Don't you just hate it when... 
DYLAN DYnamic LANguage
E Exponent (commonly used in large numbers, ie: 3.20E8) 
E&M Ear and Mouth
E&MD Engineering and Manufacturing Development 
E&P Exploration and Production (industry) 
E.B.E. Extraterrestrial Biological Entity [X-Files]
E1 European 1
E2EG Ear to Ear Grin
E3 European 3
E911 Enhanced 911 (emergency services) 
EA Electronic Arts / Expedited Acknowledgment / Explorer Advisor / Extended Attribute 
EAAT Equal Access Alternative Technologies
EADAS Engineering and Administrative Data Acquisition System
EADAS/NM EADAS/Network Management
EADASNM Engineering and Administrative Data Acquisition System Network Management 
EAEO Equal Access End Office
EAP Employee Assistance Program
EAR Export Administration Regulations
EARN European Academic and Research Network - See TERENA 
EAROM Electrically Alterable Read Only Memory
EAS Extended Announcement System / Extended Area Service 
EASD Equal Access Service Data
EASE Embedded Advanced Sampling Environment 
EASINET European Academic Supercomputer Initiative Network (usually as EASINet) 
EAX Electronic Automatic Exchange 
EB Erlang B 
EBBS Electronic Bulletin Board System 
EBCDIC Extended Binary Code - Decimal Interchange Code
EBDI Electronic Business Data Interchange
EBIOS Extended Basic Input/Output System 
EBONE European Backbone 
EBR Extended-partition Boot Record
EC Electronic Commerce / Error Correction / European Commission / European Community / Exchange Carrier(s) 
ECAD Engineering Computer Aided Design
ECAI European Conference on Artificial Intelligence 
ECAP Electronic Customer Access Program
ECASH Electronic Cash 
E-CASH Electronic Cash 
ECB Electronic Code Book / East Coast Crackers / Enter Cable Change /
    Error Checking and Correcting (memory) / Error Correction Code
ECCS Economic C (Hundred) Call Seconds
ECD Electronic Cash Disbursements
ECE Economic Commission for Europe 
ECF Enhanced Connectivity Facility
ECFA Electronic Communications Forwarding Act
ECITC European Committee for Information technology Testing and Certification 
ECL Emitter-Coupled Logic / End Communication Layer / Error Code Logging
ECM Error Correction Mode / Executive Card Manager 
ECMA European association for standardizing information and communication systems / European Computer Manufacturers Association 
ECN Explicit Congestion Notification 
ECNE Enterprise Certified NetWare Engineer / Enterprise Certified Novell Engineer 
ECO Economic Competitive Opportunity (analysis) / Engineering Change Order
ECOM Electronic Computer Originated Mail
E-COM Electronic Computer Originated Mail
ECOOP European Conference on Object Oriented Programming 
ECOS Extended Communications Operating System 
ECP Enhanced Communications Port / Extended Capabilities Port 
ECPA Electronic Communications Privacy Act (of 1986) 
ECPT Electronic Coin Public Telephone
ECR Engineering Change Request / (OpenView) Event Correlation Services / Electronic Cross-connect System / Enhanced ChipSet
ECS Event Communication Service
ECSA Exchange Carriers Standards Association 
ECTEI European Conference of Telecommunications and Electronics Industries 
ECTP Ethernet Configuration Test Protocol 
ECU European Currency Unit 
ED End Delimiter / EWOS Document / Exception Data / Expedited Data / Extra high Density
EDA Embedded Document Architecture / Enterprise Data Access 
EDAC Electromechanical Digital Adaptor Circuit / Error Detection And Correction 
EDC Engineering Data Center / Error Detection and Correction / Error Detection Code
EDD Electronic Document Delivery 
EDF Execution Diagnostic Facility 
EDFA Erbium - Doped Fiber Amplifier 
EDFG Edge Device Functional Group (ATM Forum) 
EDI Electronic Data Interchange / Electronic Document Interchange 
EDIA Electronic Data Interchange Association 
EDICUSA Electronic Data Interchange Council of the United States of America 
EDIF Electronic Data Interchange Format 
EDIFACT Electronic Data Interchange for Finance, Administration, Commerce and Transport 
EDIM Electronic Data Interchange user agent Message 
EDIME Electronic Data Interchange Messaging Environment 
EDIMG Electronic Data Interchange Messaging 
EDIMS Electronic Data Interchange Messaging System 
EDIN Electronic Data Interchange Notification 
EDINA Edinburgh Data & Information Access / Electronic Data Interchange User Agent 
EDL Edit Decision List 
EDM Enterprise Desktop Manager 
EDMD Electronic Document Message Directory 
EDMS Electronic Document Management System / Engineering-Design Management System 
EDN Expedited Data Negotiation 
EDO Extended-Data Out (RAM) 
EDORAM Extended Data Out Random Access Memory
EDP Electronic Data Processing
EDPT Enhanced Drive Parameter Table 
EDRAM Erasable Dynamic Random Access Memory
EDRS Engineering Data Resources Services
EDS Electronic Data Systems Corp. 
EDSAC Electronic Delay Storage Automatic Calculator 
EDSD Electronic Document Segment Directory 
EDSX Electronic Digital Signal Cross-Connect/X-connect
EDU Education Computer Systems / Educational (usually as .edu) 
EDVAC Electronic Discrete Variable Automatic Calculator 
EDWG ESnet DECnet Working Group
EE End to End Signaling
EEB Extended Erlang B 
EEC Electronic Equipment / European Economic Commission / European Economic Community 
EECT End-to-End Call Trace
EEDP Expanded Electronic Dialing Plan /Expanded Electronic tandem switching Dialing Plan 
EEE Electronic Equipment Enclosures
EEHO Either End Hop Off
EEI Equipment-to-Equipment Interface / External Environment Interface 
EELED Edge Emitting Light Emitting Diode 
EEMA Electrical and Electronic Manufacturing Association / European Electronic Mail Association 
EEMAC Electrical and Electronic Manufacturing Association of Canada
EEPG European Engineering Planning Group
EEPROM Electrically Erasable Programmable Read-Only Memory 
EEST Enhanced Ethernet Serial Transciever 
EETDN End-to-End Transit Delay Negotiation 
EETLA Extraordinarily Extended Three Letter Acronym 
EEVL Edinburgh Engineering Virtual Library
EF Enterprise Framework 
EFCI Explicit Forward Congestion Indication
EFD Event Forwarding Discriminator 
EFF Electronic Frontier Foundation
EFIN Electronic Filing Identification Number 
EFLA Extended Four Letter Acronym!
EFRAP Electronic Feeder Route Analysis Program
EFS End Frame Sequence / Error Free Second / Extended Facility Set / External File System / Electronic Funds Transfer
EFTA European Free Trade Association 
EFTS Electronic Funds Transfer System
EG Evil Grin / Experts Group 
EGA Enhanced Graphics Adapter 
EGCAE Experts Group for Command Application Environment 
EG-CAE Experts Group for Command Application Environment 
EGCT Experts Group for Conformance Testing 
EG-CT Experts Group for Conformance Testing 
EGDIR Experts Group on Directory 
EG-DIR Experts Group on Directory 
EGFT Experts Group on File Transfer 
EG-FT Experts Group on File Transfer 
EGLIB Experts Group for Library 
EG-LIB Experts Group for Library 
EGLL Experts Group Lower Layers 
EG-LL Experts Group Lower Layers 
EGMHS Experts Group for Message Handling System 
EG-MHS Experts Group for Message Handling System 
EGMMS Experts Group Manufacturing Message Specification 
EG-MMS Experts Group Manufacturing Message Specification 
EGNM Experts Group for Network Management 
EG-NM Experts Group for Network Management 
EGODA Experts Group for Office Document Architecture 
EG-ODA Experts Group for Office Document Architecture 
EGP Exterior Gateway Protocol
EGTP Experts Group on Transaction Processing 
EG-TP Experts Group on Transaction Processing 
EGVT Experts Group on Virtual Terminal 
EG-VT Experts Group on Virtual Terminal 
EHA European Harmonization Activity 
EHF Extremely High Frequency 
EHLLAPI Emulator High Level Language Application Programming Interface 
EI Ending Inventory
EIA Electronic Industries Association
EIB Enterprise Information Base 
EIC Electronic Information Corporation 
EIDE Enhance Integrated Drive/Device Electronics 
EIES Electronic Information Exchange System
EINET Enterprise Integration Network 
EINOS Enhanced Interactive Network Optimization System 
EIRP Effective Isotropic Radiated Power 
EIS Electronic Information Security / Enterprise Information System / Enterprise Integration Services / Executive Information System / Expanded Inband Signaling
EISA Enhanced/Extended Industry Standard Architecture
EISS Economic Impact Study System
EIT Encoded Information Type 
EIU Extended Interface Unit
EIUF European ISDN Users' Forum 
EJS Elite Justice Society
EKTS Electronic Key Telephone Service / Electronic Key Telephone Sets 
EL ElectroLuminescent (display) 
ELAN Emulated Local Area Network (ATM Forum) 
ELAP EtherTalk Link Access Protocol 
ELD ElectroLuminescent Display 
ELDS Exchange Line Data Service
ELEPL Equal Level Echo Path Loss 
ELF Employee Locater Facility / Extremely Low Frequency
ELS Entry Level System 
EM End of Medium (ASCII) 
EMA Electronic Mail Association / Electronic Messaging Association / Enterprise Management Architecture
EMACS Editing Macros
EMAIL Electronic Mail 
E-MAIL Electronic Mail 
EMAPI Extended Messaging Application Programming Interface 
EMASHE Establishing Multimedia Authoring Skills in Higher Education 
EMB Embedded Memory Block 
EMC Electromagnetic Capacity / Electromagnetic Compatibility (directive) 
EMF Electro Motive Force / Electromagnetic Field / Enhanced Metafile Format
EMI Electromagnetic Interference
EML Expected Measured Loss
EMM Expanded Memory Manager / Extended Memory Manager
EMOS East Mediterranean Optical System 
EMOS1 East Mediterranean Optical System 1
EMOTICONS Emotion Icons (aka Smileys) 
EMP Electromagnetic Pulse 
EMPM Electronic Manuscript Preparation and Markup 
EMR Electromagnetic Radiation 
EMS Expanded Memory Specification / Extended Memory Service
EMSG Email Message
EMTAG Emerging Technologies Advisory Group (usually as EmTAG) 
EMUG European MAP/TOP Users' Group 
EMV European Mastercard VISA 
EMWAC European Microsoft Windows (NT) Academic Centre 
EN European Norm/Normes 
ENE Enterprise Networking Event 
ENET Ethernet
ENFIA Exchange Network Facility for Interstate Access
ENG Engineering
ENIAC Electronic Numerical Integrator And Calculator
ENQ ENQuiry (ASCII) / Inquiry 
ENS Enterprise Naming Service 
ENSDU Expedited Network Service Data Unit
ENTELEC Energy Telecommunications and Electrical (association) 
EO End Office / Erasable Optic 
EOA End Of Address 
EOB End Of Burst 
EOC Embedded Operations Channel 
EOD End Of Day / End of Discussion
EOE Electronic Order Exchange
EOF End Of File / Enterprise Object Framework 
EOL End of Lecture / End Of Life
EOM End Of Message 
EON End Of Number 
EOS Earth Orbiting Satellite / Element Of Service / Extended Operating System
EOSDIS Earth Observing System Data and Information System 
EOT End Of Text / End Of Thread (i.e., don't reply to this message) / End Of Transfer / 
EOT End Of Transmission (ASCII) 
EOTC European Organization for Testing and Certification / End Of Toll Trunking / 
    End Office Toll Trunking 
EP ElectroPhotographic (toner cartridge) / Emulation Program 
EPA Elite Programming Association / Environmental Protection Agency 
EPABX Electronic Private Automatic Branch Exchange 
EPAC Extended Privilege Attribute Certificate 
EPDM Enterprise Product Data Management 
EPG External Products Group
EPHOS European Procurement Handbook for Open Systems 
EPI Engineering Process Improvement 
EPIC Effective Performance In Candidates / Electronic Privacy Information Center / 
     Explicitly Parallel Instruction Computing / El Paso Intelligence Center 
EPL Electronic Program Language / Electronic (switching system) Program Language 
EPLS Engineering Price List System
EPOS Electronic Point Of Sale 
EPP Enhanced Parallel Port / Executive Partner Program
EPRCA Enhanced Proportional Rate Control Algorithm (ATM Forum) 
EPROM Erasable Programmable Read Only Memory
EPS Encapsulated Post-Script 
EPSCS Enhanced Private Switched Communications Service
EPSF Encapsulated PostScript Format 
EPSRC Engineering and Physical Sciences Research Council (formerly SERC) 
EQEEB Equivalent Queue Extended Erlang B 
ER Entity Relationship (modeling) / Error / Error Register
ERA Entity Relationship Attribute / Extended Registry Attribute 
ERAR Error Return Address register
ERD Event Report Discriminator 
EREP Environmental Recording Editing and Printing
ERF Emergency Restoration Facility / Event Report Function 
ERL Echo Return Loss
ERLL Enhanced Run Length Limited 
ERM Electronic Report Management 
ERMF Event Report Management Function 
ERO Electronic Return Originator 
ERP Effective Radiated Power / Enterprise Resource Planning 
ERTICO European Road Transport Telematics Implementation Coordinating Organization 
ERU Emergency Recovery Utility / Error Return address Update 
ES Elektro Shock / End System / Errored Second / Extra Segment 
ES&D Eat Shit and Die 
ESA Enterprise Systems Architecture / Errored Second, Type A / European Space Agency
ESABATM Eat Sh*t And Bark at the Moon 
ESAC Electronic Surveillance Assistance Center
ESAD Eat Sh*t And Die
ESADMF Eat Sh*t and Die Mother F**ker
ESAFE Errored Second, Type A, Far End 
ESAL Eat Sh*t And Live
ESB Emergency Service Bureau (911) / Entry Systems Business / Errored Second, type B 
ESBFE Errored Second, Type B, Far End 
ESC Engineering Service Circuit 
ESCON Enterprise Systems Connection (architecture) 
ESCP Errored Second, CP-bit Parity 
ESCRC Errored Second, Cyclic Redundancy Check 
ESD Electronic Software Distribution / Electronic Systems Development / Electrostatic Discharge 
ESDI Enhanced Small Device Interface / Enhanced Small Disk Interface 
ESDP Educational Services Development and Publishing
ESES End System to End System 
ES-ES End System to End System 
ESF Extended SuperFrame Format
ESFE Errored Second, Far End 
ESG Engineering Systems Group
ESH End System Hello 
ESIS End System to Intermediate System 
ES-IS End System to Intermediate System 
ESL Electronic Software Licensing / Emergency Stand-aLone
ESLF Eastern Seaboard Liberation Front
ESN Electronic Serial Number / Electronic Switched Network
ESNET Energy Sciences Network 
ESO Engineering Support Operations / Entry Server Offering
ESOC European Space Operations Center
ESP Extra Sensory Perception / Ecstatic Sound Productions / Encapsulating Security Payload / 
     Enhanced Serial Port / Enhanced Service Provider / Enhanced Serial Port / 
     Errored Second, P-bit 
ESPRIT European Strategic Project for Research on Information Technology 
ESRC Economic and Social Research Council 
ESRI Environmental Systems Research Institute
ESRIN European Space Research Institute
ESS Electronic Switching System
ESSX Electronic Switching System Exchange
ESU Element Supervisor Unit 
ESUS Enhanced Single Unix Specification (sometimes as ESUS2) 
ESVN Executive Secure Voice Network
ET Exchange Termination 
ET&Q Engineering, Technology, and Quality 
ETAS Emergency Technical Assistance
ETB End of Transmission Block (ASCII) 
ETC Electronic Toll Collection / Evil Type Coercion 
ETCO European Telecommunications Consultancy Organization 
ETCOM European Testing for Certification of Office and Manufacturing (equipment) 
ETE End-To-End 
ETF Electronic Toll Fraud
ETG EWOS Technical Guide 
ETIN Electronic Transmitter Identification Number 
ETIS Electronic Telephone Inquiry System
ETL Electronic Testing Laboratory 
ETLA Enhanced TLA / Extended Three Letter Acronym/Abbreviation (ie more than three letters) 
ETN Electronic Tandem Network
ETO Electronic Trading Opportunity 
ETR Early Token Release 
ETRI Electronics and Telecommunications Research Institute 
ETRI-PEC Electronics and Telecommunications Research Institute Protocol Engineering Center 
ETRIPEC Electronics and Telecommunications Research Institute Protocol Engineering Center 
ETS Education Technology Service / Electronic Tandem Switching / Electronic Translation System / 
     European Telecommunications Standard / Executable Test Suite 
ETSACI Electronic Tandem Switching Administration Channel Interface
ETSDU Expedited Transport Service Data Unit 
ETSI European Telecommunications Standards Institute 
ETSSP Electronic Tandem Switching Status Panel
ETTM Electronic Toll and Traffic Management / Electronic Toll and Transaction Monitor 
ETX End of TeXt (ASCII) 
EU End User / European Union 
EUC Extended UNIX Code 
EUI End User Interface
EULA End User License(ing) Agreement
EUNET European UNIX Network 
EUPOT End User-Point of Termination
EuroCAIRN European Co-operation for Academic and Industrial Research Ntworking 
EURO-ISDN European wide ISDN service 
EUROSINET European Open System Interconnect Network 
EUSR End User
EUTELSAT European Telecommunications Satellite 
EUUG European UNIX Users Group 
EV Extreme Value 
EV86 Enhanced Virtual 8086
EVE European Videoconferencing Equipment / Extreme Value Engineering 
EVGA Expanded Video Graphics Array
EW Electronic Warfare 
EWHCI East-West Human-Computer Interaction (conference) 
EWICS European Workshop on Industrial Computer Systems 
EWOS European Workshop on Open Systems 
EX Expedited 
EXCA Exchangeable Card Architecture (usually as ExCA) 
EXCOM Executive Committee
EXP (or XP)Experience (Common MUD term)
EZINE Electronic Magazine
E-ZINE Electronic Magazine 
F Fahrenheit 
F&A Finance and Accounting / Finance and Administration
F/G Finished Goods
F2F Face to face (also meeting in person) / Flesh to Flesh
F3I Form, Fit, and Function Interface 
FA Fuse Alarm 
FA&T Final Assembly and Test
FAA Federal Aviation Administration 
FABS Financial and Administration Business Systems
FACS Facilities Assignment and Control System 
FACT Federation of Automated Coding Technologies 
FADU File Access Data Unit 
FAFWOA for a friend without access 
FAIS Factory Automation Interconnection System 
FAL File Access Listener 
FAMOS Floating Gate Avalanche MOS
FAN Facility Area Network 
FAPL Format And Protocols Language 
FAQ Frequently Asked Question(s) (and Answers.)
FAQL Frequently Asked Questions List 
FAR Federal Acquisition Regulation 
FARNET Federation of American Research Network 
FAST Federation Against Software Theft / First Application System Test 
FAT File Access Table / File Allocation Table 
FAX Facsimile 
FB Files Busy 
FBE Free Buffer Enquiry 
FBI Federal Bureau of Investigations
FBOD Finance Board of Directors
FC (modem) Flow Control / Feedback Control / Fiber Channel / Fingers Crossed / Frame Control 
FCA Fiber Channel Association 
FCAP Facility CAPacity 
FCB File Cache Buffer / File Control Block
FCC Federal Communications Commission / Federal Cracking Consortium / Forward Command Channel 
FCCSET Federal Coordinating Council on Science, Engineering, and Technology 
FCG False Cross or Ground / Format Computer Graphics 
FCI Frame Copied Indicator (bit) 
FCIC Federal Computer Investigations Committee 
FCL Fibre Channel Loop
FCO Field Change Order 
FCR First Customer Release
FCS Fast Circuit Switching / Fiber Channel Standard / File Control System / First Customer Ship / 
    Frame Check Sequence
FCSI Fiber Channel Systems Initiative 
FCST Forecast
FCT Fundamentals of Computation Theory 
FCVC Flow Controlled Virtual Circuit 
FDC Floppy Disk Controller
FDD Floppy Disk Drive 
FDDI Fiber Distributed Data Interface 
FDHM Full Duration Half Maximum 
FDI Feeder/Distribution Interfaces
FDL Facility Data Link 
FDM Frequency - Division Multiplexing 
FDMA Frequency Division Multiple Access
FDP Field Development Program 
FDT Formal Description Technique 
FDX Full Duplex 
FE Far End / Far East
FEA Functional Entity Action / Far East Asia
FEAR Fu*k Everything And Run or False Evidence Appearing Real
FEBE Far End Block Error (SONET) 
FEC Foreign Exchange Carrier / Forward Error Correction 
FECN Forward Explicit Congestion Notification (specification) 
FED Far End Data 
FEDI Financial Electronic Data Interchange 
FED-STD Federal Standard 
FEMF Foreign Electro-Motive Force 
FEP Front End Processor 
FEPG Federal Engineering Planning Group 
FEPS Facility and Equipment Planning System 
FERF Far End Receive Failure / Far End Reporting Failure
FERPM FTAM Error Recovery Protocol Machine 
FET Field - Effect Transistor 
FETLA Further Extended Three Letta Acronym (ie it has five letters.) 
FEV Far End Voice 
FEXT Far - End Cross Talk 
FF Form Feed (ASCII) 
FFRD Flying Fuck in a Rolling Donut (I don't give one) 
FFS For Fu*k's Sake
FFT Fast Fourier Transform / Final Form Text 
FFTDCA Final Form Text Document Content Architecture 
FG Feature Group (A, B, C, D) 
FGA Feature Group A
FGB Feature Group B
FGC Feature Group C
FGD Feature Group D
FGDC Federal Geographic Data Committee 
FGND Frame Ground 
FHD Fixed - Head Disk 
FHOF Freeware Hall of Fame 
FI File Interchange 
FID Format Identifier 
FIDDO Focused Investigation of Document Delivery Options 
FIF Fractal Image Format
FIFO First In, First Out 
FIGIT Follett Implementation Group for Information Technology 
FIGMO Forget It, I've Got My Orders
FIGS Figures Shift 
FIIN Fuc*ed if I Know
FIIOH Fu*k (or Forget) It, I'm Outta Here
FIM Facing Identification Mark / Fiber Interface Module 
FIMG Finance Industry Marketing Group
FIN Finish (flag) 
FINCEN (Federal) Financial Crimes Enforcement Network (usually as FinCEN) 
FIOC Frame Input/Output Controller
FIP Facility Interface Processor 
FIPS Federal Information Processing Standards
FIR Fast InfraRed / Finite Impulse Response 
FIRE Fragmenting IP Real-time Engine (chip) 
FIRL Fiber-optic Inter-Repeater Link 
FIRM First In Releasing Most (Incorrect Acro)
FIRST Fax Information Retrieval Support Technology / Forum on Incident Response and Security Teams 
FIS Forms Interchange Standard 
FISG Financial Industries Systems Group
FISH First In, Still Here 
FISUS Fill In Signal Units 
FITB Fill In the Blanks
FITS Flexible Image Transport System
Five-O Cracking Group - (formerly the Imperial Warlords)
FIX Federal Information eXchange / Federal Internet eXchange 
FL First Level 
FLA Four/Five Letter Abbreviation (ETLA and DETLA are preferred since they are
FLAP FDDITalk Link Access Protocol 
FLETC Federal Law Enforcement Training Center 
FLIH First Level Interrupt Handler 
FLOP Floating-Point Operation
FLP Fast Link Pulse 
FLT Fairlight 
FM Frequency Modulation / Fault Management / Fine Magic / Function Management 
FMAC Facility Maintenance And Control 
FMAP Field Manufacturing Automated Process
FMBS Frame - Mode Bearer Service 
FMC Financial Management Center
FMD Function Management Data 
FMEA Failure Modes and Effects Analysis
FMIC Field Manufacturing Information Center
FMMC Field Manufacturing Management Committee
FMP (OpenView) Fault Management Platform / Field Manufacturing Plan
FMS File Management System 
FMVFT Frequency Modulation Voice Frequency Telegraph 
FN Finish 
FNAL Fermi National Accelerator Laboratory
FNC Federal Networking Council 
FNP Front - End Network Processor 
FNPA Foreign Numbering Plan Area 
FO Fiber Optics 
FOA Fiber Optic Adapter / First Office Application
FOAD F**k Off And Die
FOAF Friend of a Friend
FOAFOAG Father of a Friend of a Girlfriend
FOAG Father of a Girlfriend
FOC Free Of Charge / Fiber Optic Communications
FOCS Foundations of Computer Science 
FOD Fax On Demand / Finger Of Death / Format Office Document 
FOE F**king Operator Error
FOIA Freedom Of Information Act 
FOIM Field Office Information Management (system)
FOIRL Fiber Optic Inter-Repeater Link 
FOMAU Fiber Optic Medium Attachment Unit 
FOMC Field Operations Management Committee
FON Fiber Optics Network
FOOBAR Variant of FUBAR (q.v.) 
FORTRAN FORmula TRANslation/Translator (programming language) 
FOS Full Of Sh*t / Freedom Of Speech / Fundamental Operating System 
FOSSIL Fido/Opus/Seadog Standard Interface Layer 
FOT Frequency of Optimum Traffic / Full of Tripe
FOTS Fiber Optic Transmission System 
FOX Field Operational X.500 
FP Functional Profile 
FPA Floating Point Adapter 
FPASD Facsimile Packet ASsembler / Disassembler 
FPCA Functional Programmin languages and Computer Architecture 
FPCP Funky Pack of Cyberpunks
FPF Facility Parameter Field 
FPGA Field-Programmable Gate Array 
FPM Feet Per Minute 
FPO For Placement Only / For Position Only 
FPODA Fixed Priority Oriented Demand Assignment 
FPP Floating Point Processor 
FPS Floating Point System / Fast Packet Switching / Frames Per Second 
FPT Forced Perfect Termination
FPU Floating Point Unit (A co-processor that does floating point-non-integer- math)
FQDN Fully Qualified Domain Name 
FR Flat Rate 
FRAD Frame Relay Access Device 
FRAM Ferroelectric Random Access Memory
FRC Frame Relay Capabilities 
FRDS Failure Resistant Disk Systems 
FRE Forward and Reverse Engineering
FRED Fucking Ridiculous Electronic Device 
FREDMAIL FRee EDucational electronic Mail 
FRF Frame Relay Forum 
FRICC Federal Research Internet Coordination Committee 
FRMR Frame Reject 
FRPS Field Reliability Performance Studies
FRS First Revenue Ship / Flexible Route Selection 
FRU Field Replacement Unit / Field Replaceable Unit 
FRZ Freakin' Religious Zealot
FS File Separator (ASCII) / Field Service / File Server / Frame Status / Full Scale / Functional Standard 
FSCE Free Solution Capillary Electrophoresis 
FSCK File System ChecK (UNIX command)
FSF Free Software Foundation 
FSG Financial Systems Group / Format Standard Generalized (markup language)
FSK Frequency Shift Keying 
FSL Field Service Logistics / Free Space Loss 
FSM Finite State Machine 
FSN Full Service Network
FSP File Service Process / File Service Protocol
FSR Free System Resources 
FSS Fully Separated Subsidiary 
FSTC Financial Services Technology Consortium 
FSTG Functional Standardization Taxonomy Group 
FSU File Support Utility 
FT Feet (usually ft or ' ) / Field Test / File Transfer 
FT1 Fractional T1 
FTAM File Transfer, Access, and Management (protocol) 
FTASB Faster than a Speeding Bullet
FTBOMH From The Bottom Of My Heart
FTC Federal Trade Commission 
FTDS Failure Tolerant Disk Systems 
FTF Face To Face 
FTG Final Trunk Group 
FTL Faster than Light
FTP File Transfer Protocol [a specific format to exchange files and data - usually also ftp - 
                                             The name of a program (method) of up/downloading
FTPD File Transfer Protocol Daemon
FTR For the record / Full-Text Retrieval 
FTS Federal Telecommunications Service / Federal Telecommunications System / 
                                                              File Transfer Service 
FTSC Federal Telecommunications Standards Committee 
FTTC Fiber To The Curb
FTTH Fiber To The Home
FTTT From Time To Time 
FU F**ked Up / Fractional Unit 
FU2 Fu*k you too
FUA Frequently Used Acronyms 
FUBAR Fouled/F**ked Up Beyond All Recognition/Reason/Repair / Failed UniBus Address Register 
FUBB fouled up beyond belief 
FUCK Fools usually get kicked
FUD (spreading) fear, uncertainty, and disinformation/doubt
FUMTU F*ed up More Than Usual
FUNI Frame-based User-to-Network Interface / Frame User Network Interface (ATM Forum) 
FURTB Full up ready to burst (about hard disk drives!) 
FVC First Volume Commit 
FVIPS First Virtual Internet Payment System
FWIW For What It's Worth 
FWTW For what that's worth
FX Effects / Foreign eXchange 
FY Fiscal Year 
FY&TSYRIO Fu*k You And The Sysop You Rode In On 
FYA For Your Action / For your amusement
FYDITM Fu*k You Directly In The Mouth 
FYE For Your Entertainment
FYEO For Your Eyes Only
FYI For Your Information
FYO For Your Opinion
FZG Folo Zone Gang
g - grin - usually in brackets or angles <g> or [g] / Giga- / Gigabyte / Gram (usually as g) / Gravity (usually as G) 
G,D&R Grinning, Ducking, And Running
G8R Later 'Gater ( As in alligator )
GA Go ahead / Genetic Algorithm
GAFIA Get Away From It All 
GAL Get A Life
GAN Global Area Network 
GAO Government Accounting Office
GAP Generic Address Parameter 
GASP Go Away, Silly Person!
gawd god
GB Gigabit (usually as Gb) / Gigabyte (usually as GB)
Gbps Gigabits Per Second (usually as Gbps) / GigaBytes Per Second (usually as GBps) 
GBS GigaBits per Second / GBS Group Bridging Service
GCA Graphic Communications Association 
GCDI Galacticomm Custom Device Interface 
GCID Global Call Identifier 
GCIDIE Global Call Identifier Information Element 
GCN Government Computer News (magazine) 
GCOS God's Chosen Operating System 
GCR Gray Component Replacement 
GCRA Generic Cell Rate Algorithm
GCS Group Control System
gd&h - grinning, ducking and hiding 
GD&R Grinning, Ducking and Running
gd&r,vvf - grinning, ducking and running, very very fast 
gd&rf grinning, ducking and running FAST! 
GD&RVVF Grinning, Ducking and Running Very Very Fast
gd&w grinning, ducking and weaving 
GDA Global Directory Agent 
GDAP Government Document Application Profile 
GDG Generation Data Group
GDI Graphics Device Interface / Graphics Display Interface (Windows) 
GDMI Generic Definition of Management Information 
GDMO Guidelines for the Definition of Managed Objects 
GDS Generalized Data Stream / Generation DataSet / Global Directory Service / Graphics Data Syntax 
GDTR Global Descriptor Table Register 
GDU Grave Dancers Union
GE General Electric / Group of Experts 
GECOS General Electric Comprehensive Operating System
GEDCOM GEnealogical Data COMmunications (file format) 
GEIS General Electric Information Systems 
GEISCO General Electric Information Services Company
GEMDES Government Electronic Messaging and Document Exchange Service 
GES Global Enterprise Services
GF Girl Friend
GFAK go fly a kite 
GFC going for coffee / Generic Flow Control
GFCI Ground Fault Circuit Interrupter
GFI General Format Identifier 
GFID General Format IDentifier 
GFN Gone For Now
GFR Grim File Reaper (pervasive data destroyer) 
GGN Gotta Go Now
GGP Gateway to Gateway Protocol
GH Getting Hard
GHZ GigaHertz (usually as GHz) 
GIA General International Area
GID Group Identification
GIF Graphical Interchange Format / Graphics Information Format 
GIG Gigabyte
GIGO Garbage In, Garbage Out
GIM Group Identification Mark
GIOP General Interoperable ORB Protocol
GIPS Giga Instructions Per Second
GIS Geographic Information System 
GITS Government Information Technology Services 
GIWIST Gee, I Wish I'd Said That 
GKS Graphics Kernal System
GL Good Luck / Group Librarian (MPE) 
GLBS Great Lakes Business Systems 
GLGH Good Luck and Good Hunting 
GLIB Gay and Lesbian Information Bureau
GM General MIDI 
GMBA Giggling My Butt Off
GMG Government Manufacturing Group
GMIDI General Musical Instrument Digital Interface
GMR Giant Magneto-Resistive
GMSK Gaussian Minimum Shift Keying 
GMSKFM Gaussian Minimum Shift Keying Frequency Modulation
GMSK-FM Gaussian Minimum Shift Keying Frequency Modulation
GMT Greenwich Mean Time (aka Zulu Time) 
GMTA Great minds think alike / Got me there again
GN Given Name 
GND Ground
GNM Generic Network Model 
GNMP Government Network Management Profile 
GNN Global Network Navigator 
GNS Get Nearest Server 
GNU GNU's Not Unix
GNVQ General National Vocational Qualification
GOD Givers of Destruction / Global Outdial / Greatly Underrated Deity 
GOES Geosynchronous Orbital Earth Satellite
GOF Gang Of Four 
GOMF Get Outta My Face
GOP Grand Old Pirates
GOS Grade Of Service
GOSIP Government Open Systems Interconnection Profile
GOV Government (usually as .gov) 
GOVT Government
GP Group Processor
GPD Gas Plasma Display / General Purpose Discipline 
GPF General Protection Fault
GPIB General Purpose Interface Bus (aka HPIB) 
GPL General Public License
GPN Government Packet Network 
GPO Government Printing Office 
GPS Global Positioning System / Global Positioning Satellite (network) 
GPV General Public Virus
GPX Graphics Processor Accelerator
GQ Generation Qualifier 
GR Grin
GR&D grinning, running & ducking [appropriate behavior after making a particularly bad joke] (alternatively GD&R) 
GR? Grinning, Running, & Ducking 
GRAD Grinning, Running & Ducking
GRC Generic Reference Configuration 
GRD GOSIP Register Database / Ground
GRE Generic Routing Encapsulation (tunneling) 
GRIN GRaded INdices 
grlz girls
GRMBL grumble
GRP Group / MOD Group Modulator
GRPMOD Group Modulator 
GRUIT Get Ready yoU Impudent Thing
GS Games Society / Group Separator (ASCII) 
GSA General Services Administration / General Sales Agent
GSAT General Telephone and Electronics Satellite Corporation
GSB General Systems Business
GSC General System Connect (bus or interface) 
GSFC Goddard Space Flight Center
GSG Government Systems Group
GSIM General Services Industry Marketing (group) 
GSM Global System for Mobile (communications) 
GSMP General Switch Management Protocol 
GSN Government Satellite Network 
GSO Geostationary Orbit
GSS Generation Support Statement / Generic Security Service 
GSS/RSS Generation Support Statement / Reception Support Statement 
GSSP General Systems Security Principles
GSTN General Switch Telephone Network 
GT Give Token 
GTA Give Token Acknowledgment / Government Telecommunications Agency 
GTB Go to bed
GTC General Telephone Company / Give Token Confirm 
GTE General Telephone and Electronics 
GTFOOMF Get the Fu** Out of My Face
GTN Government Telecommunications Network 
GTPNet Global Trade Point Network 
GTS Gamma Transfer Service
GTSY Glad To See You
GTT Global Title Transmission
GUI Good User Interface. / Graphical User Interface
GUID Globally Unique Identifier
GUIDE Graphical User Interface Design Editor
GURPG Generic Universal Role Playing Game 
GURPS Generic Universal Roleplaying Systems
GUS Guide to the Use of Standards 
guvment government
GW Getting Wet (q.v. GH) 
GYHTBH Guess you had to be here
GYHTBT Guess you had to be there
H Hexadecimal (sometimes as lowercase h) 
H&K Hug and Kiss
H/M Hotel/Motel
HA Horn Alert
HABU Have A Better 'Un
HACK Hacking And Computer Krashing
HAGN Have A Good Night
HAGS Herbally Aroused Gynecological Squad
HAGU Have A Good 'Un
HAI Hardware Accelerator Interface
HAK hugs and kisses 
HAL Hardware Abstraction Layer 
HALE Hacker's Against Law Enforcement 
HAM Home Amature Mechanic / Hybrid Access Method 
HAN Home Area Network
HAND Have A Nice Day
HASCS Harvard Arts and Sciences Computer Services 
HASP Houston Automatic Spooling Priority 
HATE Highly Artistically Talented Enterprises
HBA Host Bus Adapter 
HBFG Host Behavior Functional Group (ATM Forum) 
HBO Home Box Office 
HC HyperChannel 
HCDS High Capacity Digital Service 
HCF Halt and Catch Fire 
HCIG Health Care Industry Group 
HCL Hardware Compatability List / Hop Count Limit 
HCLRG HEFC's Colleges Learning Resources Group 
HCO High Capacity Output 
HCS Hard Clad Silica / Header Check Sequence 
HCSDS High Capacity Satellite Digital Service 
HCSS High Capacity Storage System
HCTDS High Capacity Terrestrial Digital Service 
HD Hard Disk (drive) / Hard Drive / High Density
HDA Head Disk Assembly 
HDB3 High Density Bipolar - Three (zeros) 
HDD High Double Density / Hard Disk Drive
HDK Hippy Dippy Klub
HDL Hardware Description Language 
HDLC High-level Data Link Control
HDM Hardware Device Module
HDML Handheld Device Markup Language 
HDR Host Data Replicator
HDSC High Density Signal Carrier 
HDSL High-bit-rate Digital Subscriber Line / High-data-rate Digital Subscriber Line
HDT Host Digital Terminal
HDTP Handheld Device Transport Protocol 
HDTV High Definition TeleVision 
HDX Half Duplex 
HEAP Home Energy Assistance Program 
HEC Header Error Check / Header Error Control 
HEFCE Higher Education Funding Council for England 
HEFCW Higher Education Funding Council for Wales 
HEHO High End Hop Off 
HEL Hardware Emulation Layer / Header Extension Length 
HEMP High - altitude ElectroMagnetic Pulse 
HEMS High - Level Entity Management System / High - Level Entity Monitoring Sys 
HENCE Heterogeneous Network Computing Environment (usually as HeNCE) 
HENSA Higher Education National Software Archive 
HEP Hub Expansion Port 
HEPNET High Energy Physics NETwork 
HEQC Higher Education Quality Council 
HESA Higher Education Statistics Agency
HETLA Highly Extended Three Letter Acronym 
HEU Hacking at the End of the Universe (convention) 
HF Hands Free / High Frequency 
HFC Hybrid Fiber-Coaxial / Hierarchical File System 
HGA Hercules Graphics Adapter
HGC Hercules Graphics Card 
HHIS Hanging Head in Shame
HHO1/2K Ha Ha Only Half Kidding
HHOJ Ha Ha Only Joking
HHOK Ha Ha Only Kidding
HHOS Ha Ha Only Serious
HIBCC Health Industry Business Communications Council 
HIC Headend Interface Converter / Hybrid Integrated Circuit 
HICOM High technology Communication 
HID/LOD High-Density / Low-Density (tariff) 
HILI Higher - Level Interface 
HIPO Hierarchy plus Input - Process - Output (charts) 
HIPPI HIgh Performance Parallel Interface
HIT Hackers In Touch 
HIWTH Hate it when that happens 
HIYA hello [in most any language]
HL7ECF Health Level Seven Enterprise Communications Framework 
HLF High Level Format(ting)
HLI High-speed LAN Interconnect
HLL High Level Language (API) 
HLLAPI High Level Language Application Program(ing) Interface
HLOLARAWCHAWMP Hysterically Laughing Out Loud And Rolling Around While Clapping Hands And Wetting My Pants (courtesy ecco in action)
HLPI Higher Layer Protocol Identifier 
HMA High Memory Area 
HMD Head Mounted Display 
HMI Horizontal Motion Index / Hub Management Interface / Human - Machine Interface 
HML Human - Machine Language 
HMMP HyperMedia Management Protocol 
HMMS HyperMedia Management Schema 
HMOFG or HMFG Holy Mother Of Fucking God. 
HMOS High density Metal Oxide Semiconductor
HMP Host Monitoring Protocol 
HMUX Hybrid Multiplexer 
HN Host to Network 
HNDS Hybrid Network Design System 
HNPA Home Numbering Plan Area 
HNS Hospitality Network Service 
HOB Hierarchical Operational Binding 
HOBIC Hotel Billing Information Center 
HOBIS Hotel Billing Information System 
HOH Hash Of Hashes
HOL Head Of Line 
HOMPR Hang On, Mobile Phone's Ringing
HP Hewlett Packard / Home Page ( on the WWW ) / Hit Points (Common MUD term)
HPA Hacker/Phreakers Association
HPAD Host Packet Assembler / Disassembler 
HPC Handheld Personal Computer 
HPCA High Performance Computing Act 
HPCC High Performance Computing and Communications program 
HPCCIT High Performance Computing, Communication, and Information Technology 
HPCG High Performance Computing Group 
HPFC High Performance Functional Computing 
HPFS High Performance File System 
HPGL Hewlett Packard Graphics Language 
HP-GL Hewlett Packard Graphics Language 
HPIB Hewlett Packard Interface Bus 
HPIUGA Hewlett Packard International Users Group Association 
HPM High Power Microwave 
HPO High Performance Option 
HPOFS High Performance Optical File System 
HPPPN Hewlett Packard Private Packet Network 
HPR High Performance Routing 
HPS Hardware Product Services / High Performance Systems 
HPSS High Performance Switching System 
HPT High-Pressure Tin
HQ Headquarters 
HR Horizontal Rule / Human Resources 
HRC Hybrid Ring Control 
HRD High Resolution Diagnostic Diskette / Human Resources Development
HRPF Hexadecimal Reference Publication Format 
HRSC High Resolution Stereo Camera
HRU Hackers 'R' Us 
HSC Hierarchical Storage Controller 
HSDC High - Speed Data Card 
HSF High Sierra Format 
HSIK How Should I Know 
HSIM High Speed Interface Module (W6) 
HSLAN High - Speed Local Area Network 
HSM Hierarchical Storage Management 
HSSDS High-Speed Switched Digital Service
HSSI High Speed Serial Interface
HSSP High Speed Switched Port 
HST High Speed Technology 
HT Horizontal Tabulation (ASCII) 
HTCIA High Tech Computer Investigators Association 
HTH Happy To Help / Hope This Helps
HTM HTML Extention 
HTML HyperText Mark-up Language 
HTTP HyperText Transfer Protocol
HTTPD HyperText Transfer Protocol Daemon 
HTX HTML Extention 
HU High Usage 
HUB Head Up Butt
HUTG High Usage Trunk Group 
HVAC Heating, Ventilation and Air Conditioning 
HVM High Volume Manufacturing 
HWG HTML Writers Guild 
HWS(PEST) Husband Wants Sex (Please Excuse Slow Typing)
HWSPEST Husband Wants Sex (Please Excuse Slow Typing)
HYCFAPMSFTJ Honestly you couldn't find a person more suited for the job. 
HZ Hertz (usually as Hz) 
I&M Installation and Maintenance
i-) Private Eye (detective)
I.B.M. I Blame Microsoft. 
I/O Input/Output
IA Implementation Agreement / Intel Architecture
IAA Initial Address Acknowledgment 
IAB Internet Activities Board / Internet Advisory Board / Internet Architecture Board 
IABI Intel Application Binary Interface (usually as iABI) 
IAC In Any Case / Inter-Application Communication / International Advisory Committee / Interpret As Command 
IACIS International Association of Computer Investigation Specialists 
IAD (The) Internet Acronym Dictionary / Integrated Access Device / Interface Analysis Document 
IAE In Any Event 
IAHC International Ad Hoc Committee 
IAL mIRC term for Internal Address List
IAM Initial Address Message / Inverse ATM Mux
IANA I am not a ... / Internet Assigned Numbers Authority
IANACPA I am not a CPA 
IANAL I am not a lawyer [a disclaimer of professional knowledge]
IANALBIPOOTV I Am Not A Lawyer, But I Play One On TV
IAPI Internet Application Programming Interface 
IAPP Industrial Automation Planning Panel / International Association of Presentation Professionals 
IAR Initial Address Reject 
IARTPFWTSIOWIM I am Repeating this Parrot fashion without the slightest idea of what it Means
IASG Internetwork Address Sub-Group (ATM Forum) 
IB Instruction Buffer / Interface Builder
IBC Inadequate But Cute
IBCN Integrated Broadband Communication Network 
IBI Information Builders, Inc. 
IBIS International Banking & Information Security (conference) 
IBK Idiot Behind Keyboard
IBM I Blame Microsoft / Inadequate But Marketable / Inferior But Marketable / Insidious Black Magic / International Buisness Machines / Its Been Malfunctioning / Its Better Manually
IBMNM IBM Network Management 
IBN I'm Buck Naked / Integrated Business Network
IBS Intelsat Buisness Services
IBSG Internetwork Broadcast Sub-Group (ATM Forum) 
IBTD I beg to differ. 
IBUFG Internetwork Broadcast Unknown Functional Group (ATM Forum) 
IC I See / In Character / Independent Carrier / Industry Canada / Initial Cell (rate) / 
    Inner Circle / Input Controller / Integrated Circuit / Inter-Exchange Carrier / 
    Inter-LATA Carrier 
ICA Intelligent Communications Adapter / Intelligent Console Architecture (Protocol) / 
    International Communications Association 
ICAN Individual Circuit Analysis
ICAO International Civil Aviation Organization 
ICBL Institute for Computer Based Learning 
ICBW I Could Be Wrong 
ICC International Chamber of Commerce / International Color Consortium / International Communication Conference / International Control Center / Interstate Commerce Commission
ICCB Internet Configuration Control Board 
ICCC International Computer Communications Council 
ICCP Institute for the Certification of Computing Professionals 
ICCV International Conference on Computer Vision 
ICD Interactive Call Distribution / International Code Designation/Designator 
ICDTAFD I could do this/that all fu**ing day.
ICE Inner Circle Elite / Insane Creator Enterprises (usually as iCE) / 
    Integrated Compression Engine / International Communications Echomail / 
    Intrusion Countermeasure Electronics / In-Circuit-Emulator
ICECCS International Conference on Engineering of Complex Computer Systems 
ICES (IC) Interference-Causing Equipment Standard 
ICFA International Computer Fax Association 
ICFG IASG Coordination Function Group (ATM Forum) 
ICH International Call Handling
ICI Incoming Call Identification / Interexchange Carrier Interface / Interface Control Information 
ICL International Computers Limited 
ICLID Individual Calling Line Identification
ICLP International Conference on Logic Programming 
ICM Integrated Call Management
ICMP Internet Control Message Protocol
ICN International Cooperating Network / InterConnecting Network 
ICO Intermediate Circular Orbit (satellite) 
ICOMP Intel Comparative Microprocessor Performance 
ICOS International Club for Open Systems 
ICOT ISDN COnformance Testing 
ICP Initial Connection Protocol / Internet Control Protocol / Interprocess Communications Protocol 
ICPOT InterExchange Carrier-Point of Termination
ICPP International Conference on Parallel Processing 
ICPR International Conference on Pattern Recognition 
ICPT Intercept Tone 
ICR Inductance,Capacitance,Resistance / Intelligent Call Router / Intelligent Charachter Recognition
ICRA International Conference on Robotics and Automation 
ICRIS Integrated Customer Record Information System
ICS Italian Cracking Service
ICSC Inter-LATA Customer Service Center 
ICSE International Conference on Software Engineering 
ICSR Independent Customer Service Representative 
ICST Institute for Computer Sciences and Technology
ICSU Internal Channel Service Unit 
ICUG International Closed User Groups
ICUR I See You Are
ICVT InComing Verification Trunk
ICW Interrupt Continuous Wave 
ID Identification / Identifier / Internet Draft 
I-D Internet-Draft 
IDA Integrated Digital Access
IDAPI Independent Database Application Programming Interface / Integrated Database Applicati 
IDC Information Distribution Companies / Insulation Displacement Contact / 
    International Data Corporation / Internet Database Connector 
IDC/HTX Internet Database Connector HTML Extention 
IDCI Interim Defined Central Office Interface
IDCMA Independent Data Communication Manufacturers' Association 
IDD International Direct Dialing 
IDDD International Direct Distance Dialing
IDE Integrated Development Environment / Integrated Device Electronics / 
    Interactive Development Environment / Integrated Drive Electronics (hard drive interface) / 
    Intelligent Drive Electronics 
IDEA International Data Encryption Algorithm / Internet Design, Engineering, and Analysis
IDECUS Internal Digital Equipment Corporation User's Society
IDF Intermediate Distribution Frame 
IDG Inter-Dialog Gap 
IDGABTT It Don't Get Any Better Than This
IDGAD I Don't Give a Damn
IDGAS I Don't Give a Shi*
IDH Inpherno Data Haven
IDI Initial Domain Identifier / Intergalactic Dismantling Incorporated
IDK I don't know 
IDL (RPC) Interface Definition Language 
IDLC Integrated Digital Loop Carrier
IDM Integrated Diagnostic Modem 
IDMR InterDomain Multicast Routing
IDN Integrated Digital Networks
IDP Initial Domain Part / Integrated Detector Pre-amplifier / Internet Datagram Protocol 
IDPR InterDomain Policy Routing 
IDRP InterDomain Routing Protocol 
IDS Internal Directory System 
IDSL ISDN Digital Subscriber Line
IDT Interrupt Dispatch Table 
IDTR Interrupt Descriptor Table Register 
IDTS I Don't Think So
IDTT I'll Drink To That! 
IDU Interface Data Unit 
IDUG International DB2 Users Group 
IDVC Integrated Data / Voice Channel 
IE Information Element 
IEC InterExchange Carrier / International Electrotechnical Commission 
IED International Engineering Development
IEE Institute of Electrical Engineers 
IEEE Institute of Electrical and Electronic and Electrical Engineers
IEG Internal Equipment Group
IEN Integrated Enterprise Network / Internet Engineering Note 
IEPG Intercontinental Engineering Planning Group 
IES Information Exchange System 
IESG Internet Engineering Steering Group
IETF Internet Engineering Task Force
IETS Interim European Telecommunications Standard 
I-ETS Interim European Telecommunications Standard 
IF Intermediate Frequency / Interrupt (enable) Flag 
IFC Internet Foundation Classes
IFD Image File Directory
IFDC International File Distribution Cooperative 
IFF Interchange File Format 
IFG InterFrame Gap 
IFH Image File Header
IFIP International Federation for Information Processing
IFL Image File List 
IFM Intelligent Flow Management
IFOBS International Forum on Open Bibliographic Systems
IFRB International Frequency Registration Board 
IFRPS Intercity Facility Relief Planning System
IFS Installable File System 
IFTW Install From The Web
IFU Interworking Functional Unit 
IGES Initial Graphics Exchange Specification 
IGMP Internet Group Management Protocol / Internet Group Multicast Protocol
IGOSS Industry and Government Open Systems Specification 
IGP I Gotta Pee / Interior Gateway Protocol
IGRDLNAIPTTPG I got really drunk last night and I prayed to the porcelain god
IGRP Internet Gateway Routing Protocol 
IHA International Hackers Association
IHL Internet Header Length 
IHNS I have no standards
IHV Independent Hardware Vendor 
IIA Information Interchange Architecture 
IID Interface Identifier
IIJ Internet Initiative Japan 
IIM Inventory Information Management 
IIN Integrated Information Network
IINREN Interagency Interim National Research and Education Network 
IIOP (CORBA) Internet Inter-ORB Protocol / Internet Interoperable ORB Protocol
IIRC If I Recall Correctly / If I Remember Correctly
IIRG International Information Retrieval Guild
IIS Internet Information Server / Internet Information Services 
IISF International Information Security Foundation
IISP Interim Inter-switch Signaling Protocol 
IITF Information Infrastructure Task Force 
IITP Internetwork Interoperability Test Plan 
IITYWIMIWHTKY If I tell you what it means, I will have to kill you
IITYWIMWYBMAD If I tell you what it means, will you buy me a drink? 
IITYWTMWYBMAD If I Tell You What This Means Will You Buy Me A Drink?
IITYWTMWYKM If I tell you what this means will you kiss me? 
IIW ISDN Implementors Workshop 
IIWM if it were me (mine) 
IJCAI International Joint Conference on Artificial Intelligence 
IJCNN International Joint Conference on Neural Networks
IKITBIRIIT I know it's true because I read it in Truthnet
IKP Internet Keyed Payment (protocol) 
IL Indirect Labor
ILAC International Laboratory Accreditation Conference
ILD Injection Laser Diode 
ILF I'll Look Forward / Information Liberation Front 
ILINRAW I lied, i'm not really a woman
ILIWTPCT I Love It When the Plan Comes Together
ILMI Integrated Layer Management Interface / Interim Link Management Interface / Interim Local Management Interface 
ILOP Intelligent Local OPeration 
I-LOP Intelligent Local OPeration 
ILPS International Logic Programming Symposium 
ILSHIBAMF I Laughed so Hard I Broke All my Furniture
ILY I Love You 
IM Intelligent Messaging / Intensity Modulation / Interface Module / Interpersonal Messaging 
IM&T Information and Technology Management
IMA Interactive Multimedia Association / Inverse Multiplexing over ATM 
IMAC Isochronous Media Access Control 
IMADA (Danish) Institut for Matematik og Datalogi 
IMAO In My Arrogant Opinion 
IMAP Interactive Mail Access Protocol / Internet Message(ing) Access Protocol
IMAS Integrated Mass Announcement System
IMBBSA International Major Bulletin Board System Association 
IMBO In My Biased Opinion or In My Bloody Opinion
IMC Initial Microcode Load
IMCAO in my completely arrogant opinion (Use for attracting flames!) 
IMCO In My Considered Opinion [var. of IMHO]
IME In My Experience
IMHO In My Honest Opinion / In My Humble Opinion 
IMIL International Management Information Library 
IMM Idle Material Management / Input Message Manual
IMnerHO In my not even remotely humble opinion 
IMNSHO In My Not So Humble Opinion
IMO In My Opinion 
IMOBO In My Own Biased Opinion. 
IMP Information Management Plan / Interface Message Processor
IMPACT Information Market Policy Actions / Impact Avalanche and Transit Time 
IMPO In my pious opinion
IMPS Interface Message ProcessorS 
IMR Information Management Research / Internet Monthly Report
IMS Information Management System / Integrated Management Systems
IMSP Independent Manufacturer Support Program 
IMT Inter-Machine Trunk 
IMTC International Multimedia Telecommunications Consortium 
IMTS Improved Mobile Telephone Service 
IM-UAPDU Interpersonal Messaging User Agent Protocol Data Unit 
IMUX Inverse MUltipleXing
IMVHO In My Very Humble Opinion
IN Inch (usually as in or " ) / Intelligent Network
IN/1 Intelligent Network/1
INA Information Networking Architecture 
INAL I'm Not A Lawyer 
INAP Intelligent Network Access Point
INARP Inverse Address Resolution Protocol (usually as InARP) 
INC Incorporated / International Carrier / International Network of Crackers
INCA Integrated Network Communication Architecture 
INFOSEC INFOrmation systems SECurity 
INHCBSIGIAV I've never had cybersex before so I guess i'm a virgin
INIT Initialization 
INL Inter Node Link
INMARSAT INternational MARitime SATellite service 
INN Inter Node Network
INP Intelligent Network Processor 
INPO In No Particular Order
INRIA Institut National de Recherche en Informatique et en Automatique 
INS Information Network System
INT Integer 
INTA International Trademark Association 
INTAP INteroperability Technology Association for information Processing 
INTELSAT International Telecommunications Satellite Consortium/Organization
InterNIC Internet Network Information Center
INTT Incoming No Test Trunks
INTUG INternational Telecommunications Users' Group 
INV Inventory
INWATS Inward Wide Area Telephone/Telecommunications Service
INWG International Network Working Group
IO Independent Option / Input/Output / Inward operator
IOC Input/Output Controller
IOCC International Overseas Completion Center
IOD Identified Outward Dialing 
IOE Illegal Operation Error 
IOHO In our humble opinion
IOM Input/Output Module 
IONL Internal Organization of the Network Layer 
IOP Input/Output Processor / Interoperability 
IOPL Input/Output Privilege Level
IOS Input/Output System / Internetwork Operating System / Intermediate Open System / Inter-Network Operating System 
IOT Inter-Office Trunk
IOW In Other Words 
IOWA Inmates of the World Asylum
IP Information Provider / Instruction Pointer / Intermediate Point / Internet Protocol
IPAYTF I'm pregnant and you're the father 
IPC Internet Proxy Cache / InterProcess Communication 
IPCH Initial Paging Channel
IPCS Interactive Problem Control System
IPD Internet Protocol Datagram 
IPDP Industrial Peripheral Data Processing
IPDS Intelligent Printer Data Stream
IPDU Internetwork Protocol Data Unit 
IPE In-band Parameter Exchange 
IPG Image Processing Group
IPH Impressions Per Hour 
IPI Initial Protocol Identifier / Intelligent Peripheral Interface / International Painting Interactive (project) 
IPL Initial Program Load
IPLAN Integrated Planning And Analysis
IPLS InterLATA Private Line Services
IPM Images Per Minute / Impulses Per Minute / InterPersonal Messaging / Interruptions Per Minute
IPMI Internet Provider Multicast Initiative
IPMO Industry Program Management Office
IPMS InterPersonal Messaging Service / InterPersonal Messaging System 
IPMUA InterPersonal Messaging User Agent 
IPM-UA InterPersonal Messaging User Agent 
IPN Integrated Packet Network / International Printers Network / Internet Protocol Number
IPNG Internet Protocol Next Generation (usually as IPng) 
IPNS ISDN PBX Networking Specification / Forum A body committed to accelerate development of the QSIG standard by providing co-ordinated input to ECMA 
IPPM Internet Protocol Performance Metrics 
IPPS International Parallel Processing Symposium 
IPS Inches Per Second (usually ips) / Information Processing System / Internet Protocol Suite (aka TCP/IP) 
IPSG Internal Product Strategies Group
IPSIT International Public Sector Information Technology 
IPT Inventory Program Team
IPTF Information Protection Task Force 
IPV4 Internet Protocol Version 4
IPv6 Internet Protocol Version 6
IPX Integrated/Internet/Internetwork Packet Exchange
IPX/SPX Internetwork Packet Exchange / Sequenced Packet Exchange 
IPXODI Internetwork Packet Exchange Open Data-Link Interface 
IR Immortal Riot / InfraRed / Internet Registry / Internet Router / Inter-network Router 
IRC Internet Relay Chat / International Record Carrier 
IRD Information Resource Dictionary 
IRDA Infrared Data Association / Infrared Developers Association 
IRDS Information Resource Dictionary System 
IRF Inherited Rights Filter / Intermediate Routing Function 
IRG International Rogues Guild
IRHTTWOOH It's really hard to type with only one hand
IRL In Real Life
IRM Inherited Rights Mask 
IRMFI I Reply Merely For Information
IROR Internal Rate of Return
IROS Intelligent Robots and Systems 
IRP-BBS Information Reporting Program Bulletin Board System / Information Returns Program Bull 
IRQ Interrupt - Request Line/Level 
IRR Internal Rate of Return
IRS Internal Revenue Service 
IRSG Internet Research Steering Group 
IRT In Regards To 
IRTF Internet Research Task Force
IRTOS I20 Real Time Operating System
IRV International Reference Version 
IS Information Services 
IS Information Systems
IS Intermediate System 
IS International Standard 
IS Internet Standard 
IS Interrupt Set
ISA Industry Standard Adapter / Interactive Services Association
ISA Industry Standard Architecture
ISA Interactive Services Association
ISAKMP Internet Security Association and Key Management Protocol
ISAM Indexed Sequential Access Method 
ISAPI Internet Server Application Programming Interface /Internet Server Advanced Programming Interface
ISBN International Standard Book Number 
ISBS Information Systems Business Segment
ISC Inter-Nation Switching Center
ISC Inter-nation Switching Center / International Switching Center 
ISC International Switching Center
ISCA Intelligent Synchronous Communications Adapter 
ISCC Intelligent Systems Control Console 
ISCF Inter-System Control Facility 
ISD International Subscriber Dialing 
ISDL ISDN Digital Subscriber Line
ISDN Integrated Service Digital network / It Should Download Now / It Still Does Nothing
ISF Information Security Foundation
ISH Intermediate System Hello 
ISI Information Sciences Institute 
ISIS Image and Scanner Interface Specification / Intermediate System to Intermediate System / Internally Switched Interface System / Investigative Support Information System
IS-IS Intermediate System to Intermediate System 
ISLM Integrated Services Line Module
ISLU Integrated Services Line Unit
ISM Industrial, Scientific, and Medical / Installed Systems Marketing / Intermediate Service Module / Internet Service Manager 
ISMF Interactive Storage Management Facility
ISN Information Systems Network / Initial Sequence Number / Integrated Systems Network / Internet Society News 
ISO International Standardisation Organisation
ISO/CS International Organization for Standardization Central Secretariat 
ISOC (The) Internet Society (ISoc)
ISOCS International Standardization Organization Central Secretariat 
ISODE International Standardization Organization Development Environment 
ISORM International Standardization Organization Reference Model 
ISP Internet Service Provider / International Standardized Profile 
ISPA Internet Service Providers Association / Inverted Socket Process Architecture
ISPATS International Standardized Profile Abstract Test Suite 
ISPETS International Standardized Profile Executable Test Suite 
ISPF/PDF Interactive System Productivity Facility / Program Development Facility
ISPICS International Standardized Profile Implementation - Conformance Statement 
ISPN INFO Security Product News
ISPS Information System Production Systems
ISPT Instituto Superiore Poste e Telecommunicazioni (Superior Institute for Post and Teleco 
ISQL Interactive Structured Query Language 
ISR Internet Service Routine / Interrupt Service Routine 
ISS Initial System Sale / Internal Special Systems / Integrated Switching System
ISSA Information Systems Security Association
ISSB Information Systems Standards Board 
ISSC Information Services Sub-Committee 
ISSG Information Strategies Steering Group 
ISSM Information Systems Security Monitor
ISSN Integrated Special Services Network
ISSO Information Systems Security Organization 
ISTE International Society for Technology in Education
ISTM It Seems To Me
ISTR I Seem To Recall
ISU Integrated Service Unit
ISUP Integrated Services User Part / ISDN User Part 
ISUS Information Services and User Support 
ISV Independent Software Vendor 
ISWS Internal Software Services
ISWYM I See What You Mean
IT Information Technology / Information Type / Intelligent Terminal 
ITA International Telegraph Alphabet 
ITAA Information Technology Association of America 
ITAEGC Information Technology Advisory Experts' Group on Certification 
ITAEGS Information Technology Advisory Experts' Group on Standardization 
ITAEGT Information Technology Advisory Experts' Group on Telecommunications 
ITAP Information and Technology Architecture Plan
ITAR International Traffic in Arms Regulation
ITB Intermediate Text Block 
ITC Independent Telephone Company 
ITCA International TeleConferencing Association 
ITCC Information Technology Consultative Committee 
ITDM Intelligent Time - Division Multiplexer 
ITE Information Technology Equipment 
ITG Imaging Technologies Group
ITI Industrial Technology Institute 
ITI Intelligent Transportation Infrastructure / Interactive Terminal Interface 
ITIMS In-service Transmission Impairment Measurement Set 
ITLD International Top-Level Domain (usually as iTLD) 
ITNFA I tested negative for aids
ITRC Information Technology Requirements Council 
ITRO In The Region Of
ITRW In The Real World 
ITS Incompatible Time Sharing System 
ITS Incompatible Time-Sharing System
ITS Institute of Telecommunication Science
ITS Institute of Telecommunication Science / Institute for Telecommunication Sciences 
ITS Intelligent Transportation System (previously IVHS) 
ITS Internal Theft Syndicate
ITS Internet Telephony Server
ITS Invitation To Send 
ITSB Image Technology Standards Board 
ITSC Inter-regional Telecommunications Standards Conference 
ITSEC Iformation Technology Security Evaluation Criteria
ITSEC Information Technology Security Evaluation Criteria 
ITSMA Information Technology Services Marketing Association 
ITSO Incoming Trunk Service Observation
ITSP Information Technology and System Planning 
ITSTC Information Technology STeering Committee 
ITT International Telephone & Telegraph
ITT Invitation To Transmit 
ITTA Iformation Technology Training Association
ITTA Information Technology Training Association
ITTI Information Technology Training Initiative 
ITTP Intelligent Terminal Transfer Protocol 
ITU International Telecommunications Union
ITUA Independent T1 Users' Association 
ITU-T International Telecommunication Union (formerly the CCITT) 
ITU-TSS International Telecommunications Union - Telecommunications Standardization Section 
ITV Interactive TeleVision
ITYH Is that your hand?
ITYIRAPA I'm telling you, I really am Pamela Anderson
IUD INC (International Network of Crackers) Utilities Division 
IUD INC Utilities Division
IUD Insert Usual Disclaimers
IUT Implementation Under Test 
IUW ISDN User's Workshop 
IVD Integrated Voice and Data 
IVDMS Integrated Voice and Data Multiplexers 
IVDT Integrated Voice and Data Terminal 
IVDTE Integrated Voice and Data Terminal Equipment 
IVHS Intelligent Vehicle - Highway System 
IVIS Interactive Video Interface System
IVMO Initial Value Managed Object 
IVN Intervening Network 
IVP Installation Verification Program
IVPC International Virus Prevention Conference
IVR Interactive Voice Response
IVTS International Video Teleconferencing Service
IW Imaging World (magazine) / Imperial Warlords (aka Five-0) / Information Week (magazine) 
IWALU I Will Always Love You 
IWBNI It Would Be Nice If
IWF InterWorking Function 
IWM Incremental Warehaouse Methodology / Integrated Woz Machine
IWM Integrated Woz Machine
IWMM International Workshop on Memory Management 
IWU Intermediate Working Unit / Internetworking Unit / Interworking Unit 
IX Integrated POSIX (usually as MPEiX) / Interactive Executive
IXC Inter eXchange Carrier / IntereXchange Channel 
IXI International X.25 Interconnect 
IXM IntereXchange Mileage
IXSQL Interval Extensions to SQL 
IYFEG Insert Your Favorite Ethnic Group 
IYKWIM If you know what I mean 
IYSWIM If You See What I Mean
JAD Joint Application Development 
JAM Just A Minute
JANET Joint Academic Network 
JASE Just another system error 
JASPER JISC Academic Service Providers to Educate and Research 
JAUC Journal of American Underground Computing 
JBIG Joint Bi-level Imaging Group 
JBOD Just a Bunch Of Disks 
JCL Job Control Language 
JDA Joint Development Agreement 
JDBC Java DataBase Connection / Java DataBase Connectivity 
JDI Java Driver Interface
JDK Java Development Kit
JEC Job Evaluation Classification 
JEDEC Joint Electron Devices Engineering Council
JEDI Joint Electronic Data Interchange 
JEIDA Japanese Electronic Industry Development Association 
JEMA Japanese Electric Machinery Association 
JEPI Joint Electronic Payment Initiative 
JES Job Entry Subsystem
JES Job Entry System 
JFC Java Foundation Classes
JFS Journaled File System 
JFTR Just for the record
JFYI - Just For Your Information 
JGL Java Generic Library
JIBS JISC Bibliographic Service User Group 
JIC Just In Case 
JIDM (X/Open) Joint InterDomain Management 
JIM Job Information Memorandum 
JIPS JANET Internet Protocol Service 
JIS Jurisdictional Interstate Services 
JISC Japanese Industrial Standards Committee / Joint Information Systems Committee 
JIT Just In Time 
JITEC Joint Information Technology Experts Committee 
JJ Just Joking (usually as < jj>) 
JK Just kidding (can also stand for joking - <jk>) 
JMAIL Junk eMail (aka Spam) 
J-MAIL Junk eMail (aka Spam) 
JMAPI Java Management APlication Interface
JMHO Just My Humble Opinion 
JMO Just My Opinion 
JMUG Japanese MAP/TOP User Group 
JMX Jumbogroup Multiplex 
JNDI Java Naming and Directory Interface 
JNET Japanese Network
JNT Joint Network Team 
JNUG JANET National User Group 
JOOP Journal of Object-Oriented Programming 
JOVIAL Jule's Own Version of the International Algorithmic Language
JPEG Joint Photographic/Picture Experts Group 
JPL Jet Propulsion Laboratory
JRAG Joint Registration Advisory Group 
JRMP Java Remote Method Protocol
JS JavaScript
JSA Japan Standards Association 
JSC Johnson Space Center
JSN Junction Switch Number 
JSNM Just Stark Naked Magic 
JSW Junctor Switch 
JTAP JISC Technology Applications Programme 
JTC Joint Technical Committee 
JTCI Joint Technical Committee on Information technology. 
JTLYK Just To Let You Know
JTM Job Transfer and Manipulation 
JTP Jolt Transaction Protocol
JTS Java Transaction Services
JTYWTK Just Thought You Wanted To Know 
JUGA JANET User Group for Administrators 
JUGL JANET User Group for Libraries 
JUNET Japanese UNIX Network 
JUSW Janet User Support Workshop 
JVM Java Virtual Machine 
JVTOS Joint Viewing and Tele-Operation Service 
K 1000 (like, 2K = 2000) / Kilo / Kilobit / Kilobyte 
KAK Key - Auto - Key 
KAU Key station Adapter Unit 
KB Keyboard / Kilobit (usually as Kb , 1024 bytes) / KiloByte (usually as KB) 
KB/S Kilobits per Second (usually as Kb/s) 
KBD KeyBoarD 
KBPS Kilobits Per Second (usually as Kbps) / KiloBytes Per Second (usually as KBps) 
KD Keyboard Display
KDC Key Distribution Center 
KDD Kokusai Denshin Denwa 
KDS Keyboard Display Station 
KDT Keyboard Display Terminal 
kewl cool
KFT KiloFeet 
KG Kilograms (usually as kg) 
KHZ Kilohertz (usually as kHz) 
KIF Knowledge Interchange Format
KIS Knowbot Information Service 
KISS Keep It Safely Secure / Keep It Simple, Stupid
KIT Keep In Touch
KKC Ku Klux Connecticut
KKHPAC Ku Klux Hackers, Phreakers, Anarchists of Connecticut
KKK Ku Klux Klan
KMA Kiss my As*
KMP Key Management Protocol 
KMYF Kiss Me You Fool 
KNU KNowlege Utility (KnU)
KOC Kiss On Cheek
KOL Kiss On Lips
KOS Knights Of Shadow 
KotL Keeper of the List 
KP Key Pulse 
KPL Kit Parts List 
KSAM Keyed Sequential Access Method file 
KSO Keyboard Send Only 
KSR Keyboard Send and Receive 
KSU Key Service Unit 
KTS Key Telephone Set / Key Telephone System 
KTU Key Telephone Unit 
KWIM Know What I Mean?
L2F Layer Two Forwarding
L2TP Layer Two Tunneling Protocol
L8R Later (as in Good-bye) 
L8RG8R Later 'Gater
LA Library Association
LAA Locally Administered Address 
LAB&TYD Life's A Bitch & Then You Die. 
LAC Loop Assignment Center 
LAD Local Area Disk 
LADS Local Area Data Service 
LADT Local Access Data Transport / Local Area Data Transport
LAGNAF Let's all get naked and f#$%!
LAGNAFA Lets All Get Naked and Fool Around
LAIS Local Automatic Intercept System 
LAL Leased Access Line 
LAM Lobe Attachment Module 
LAMA Local Automatic Message Accounting 
LAN Local Area Network 
LAN/RM Local Area Networks Reference Model 
LANAO Local Area Network Automation Option 
LANE Local Area Network Emulation 
LANIC Local Area Network Interface Card 
LANL Los Alamos Nuclear Laboratories 
LAP Link Access Procedure / Link Access Protocol 
LAPB Link Access Procedure - Balanced
LAP-B Link Access Procedure - Balanced 
LAPB Link Access Procedure Balanced 
LAPD Link Access Procedure on the D channel 
LAPM Link Access Procedure for Modems 
LAP-M Link Access Procedure for Modems 
LAPX Link Access Procedure half dupleX 
LART Luser Attitude Readjustment Tool 
LASER Light Amplification by Stimulated Emission of Radiation
LASS Local Area Signaling Service / Local Area Switching Service
LAST Local Area System Transport 
LAT Laser Ablation Transfer / Local Area Transport 
LATA Local Access Transport Area / Local Access and Transport Area
LATI Loop Activity Tracking Information
LATIS Loop Activity Tracking Information System 
LAV Load AVerage
LAVC Local Area Vax Cluster 
LAW Lyrical Association of Writers
LAWN Local Area Wireless Network 
LB Leaky Bucket / Local Bus / Pound (usually as lb) 
LBA Logical Block Address(ing) 
LBL Lawrence Berkeley Laboratory
LBO Line BuildOut 
LBRV Low Bit Rate Voice 
LBS LAN Bridge Server / Load Balance System 
LBT Listen Before Talk(ing)
LC Line Conditioner / Link Control / Local Channel 
LCAMOS Loop CAble Maintenance Operation System 
LCC Leadless Chip Carrier / Lost Calls Cleared 
LCCIS Local Common Channel Interoffice Signaling/Signing
LCCL Line Card Cable 
LCCLN Line Card Cable Narrative 
LCD Liquid Crystal Display / Loss of Cell Delineation / Lost Calls Delayed / Line Current Disconnect 
LCDN Last Called Directory Number
LCF Log Control Function 
LCGN Logical Channel Group Number 
LCI Logical Channel Identifier / Logical Channel Identific
LCIE Lightguide Cable Interconnection Equipment 
LCLOC Line Card LOCation 
LCM Line Concentrating Module 
LCN Logical Channel Number(s)
LCP Link Control Protocol 
LCR Least Cost Routing / Line Control Register 
LCRMKR Line Card Remarks, Retained 
LCSE Line Card Service and Equipment 
LCSEN Line Card Service and Equipment Narrative 
LCT Large Capacity Tray 
LCT-RTS Languages, Compilers, and Tools for Real-Time Systems 
LD LAN Destination / Laser Diode / Long Distance 
LDAP Lightweight Directory Access Protocol 
LDCELP Low Delay Code Exciting Linear Prediction
LD-CELP Low-Delay Code Excited Linear Prediction
LDDI Local Distributed Data Interface 
LDDS Local Distributed Data Service 
LDEV Logical Device (number) 
LDM Limited Distance Modem 
LDMTS Long Distance Message Telecommunications Service 
LDN Listed Directory Number 
LDP Laboratory Data Products 
LDS Local Digital Switch 
LDTR Local Descriptor Table Register 
LE LAN Emulation 
LEA Law Enforcement Agency 
LEAS LATA Equal Access System 
LEBC Low End Business Center 
LEC LAN Emulation Client / Local Exchange Carrier 
LECID LAN Emulation Client Identifier 
LECS LAN Emulation Configuration Server 
LED Light Emitting Diode / Lightly Educated Dudes
LEDS Low End Disk Systems 
LEEP Large Expanse Extra Perspective
LEETAC Law Enforcement Electronic Technology Assistance Commi
LEGSS Low End Graphics Sub-System 
LEN Large Extension Node / Line Equipment Number / Low End Networks
LENCL Line Equipment Number CLass 
LENNI LAN Emulation Network-to-Network Interface 
LEOS Low Earth Orbit Satellite 
LES LAN Emulation Server 
LES/BUS LAN Emulation Server / Broadcast and Unknown Server
LEST Low End Systems and Technologies 
LF Line Feed (ASCII) / Line Finder / Low Frequency / Largest Frame 
LFACS Loop Facilities Assignment and Control System 
LFC Local Function Capabilities 
LFM Link Framing Module 
LFN Long Fat Network / Long File Name
LGC Line Group Controller 
LGN Logical Group Node / Logical Group Number 
LHB Line History Block
LHM Lord Help Me
LHO Laughing Head Off 
LHT Long Holding Time 
LHU Lord Help Us 
LI Length Indicator / List Item
LIB Library 
LibOp Libraries Operator
LICS Logic In Computer Science / Lotus International Character Set 
LID Local Injection / Detection 
LIDB Line Information DataBase 
LIF Low Insertion Force 
LIFO Last In, First Out
LIJP Leaf Initiated Join Parameter 
LIK Legends In Kaos
LILO LInox LOader
LIM Line Interface Module / Lotus-Intel-Microsoft
LIMDOW Light Intensity Modulation Direct OverWrite (technology)
LIMS Lotus Intel Microsoft Specification 
LIP Large Internet Packet 
LIPS Lightweight Internet Person Schema 
LIPX Large Internetwork Packet Exchange 
LIS Legacy Information Systems / Lithium Ion Storage
LISP LISt Processing (programming language) / Lots of Infuriating & Silly Parenthesis
LIT Line Insulation Test 
LIU Line Interface Unit 
LIV Link Integrity Verification 
LIW Long Instruction Word
LJ (HP) LaserJet 
LKG Last Known Good 
LL Lower Layers 
LLAP LocalTalk Link Access Protocol 
LLATMI Lower Layer Asynchronous Transfer Mode Interface 
LLC Limited Liability Company / Local Link Control / Logical Link Control )Sublayer / Type 1 or Type 2) 
LLC/SNAP Logical Link Control SubNetwork Access Protocol 
LLCS Logical Link Control Security 
LLF Low Level Format(ing)
LLI Lunatic Labs Incorporated 
LLN Line Link Network 
LLP Lower Layer Protocol 
LLPDU Logical Link Protocol Data Unit 
LLS LAN - Like Switching 
LLSIG Lower Layer Special Interest Group 
LLTA Lots and Lots of Thunderous Applause
LLWANP LAN - to - LAN Wide Area Network Program 
LM Layer Management 
LMAO Laughing My As* Off 
LMB Lower Memory Block / Left Mouse Button
LMDS Local Multipoint Distribution Service
LME Layer Management Entity / License Management Facility / Low Magnetic Field 
LMFAO Laughing My Fu**ing As* Off
LMI Layer Management Interface / Local Memory Interconnect
LMKOAP Let Me Know Of Any Problems
LMMP LAN / MAN Management Protocol 
LMMS LAN / MAN Management Service / Local Message Metering System 
LMOS Loop Maintenance Operating System
LMSO Laughing My Socks Off
LMTTA Leave Me the F* Alone
LMU LAN Manager for UNIX 
LMWIS Lick Me Where I Sweat 
LMX L MultipleX 
LN Load Number 
LNA Low Noise Amplifier 
LNB Low Noise Block Deconverter
LND Local Number Dialing 
LNM LAN Network Manager 
LNNI LAN Emulation Network-to-Network Interface
LO Line Occupancy 
l-o Yawning
LOBJECT Line Of Business obJECT 
LOC Library Of Congress / Local Operating Company / Loss Of Cell (delineation) 
LOCAP LOw CAPacitance 
LOD Legion of Doom / Level Of Detail
LOD/H Legion of Doom/Hackers
LODH Legion Of Doom Hackers 
LOF Lock Off-line / Loss Of Frame 
LOL Laugh(s) Out Loud / Laughing out loud / Laughed Out Loud / Legion Of Lucifer / Lots Of Luck 
LOLFOMC laughing out loud, falling off my chair <Eenie>
LON Lock On-line
LOP Loss Of Pointer 
LORAN Long Range Navigation 
LORTAD Law on Protection of Personal Data 
LOS Line Of Site 
LOTSAB Legion Opposed to Stupid Asshole Botanists
LPC Linear Predictive Coding / Local Procedure Call 
LPCDF Low Profile Combined Distributing Frame 
LPD Line Printer Daemon (sometimes as lpd) 
LPF League for Programming Freedom 
LPI Lines Per Inch (usually as lpi) 
LPM Lines Per Minute 
LPN Local Packet Network 
LPP Lightweight Presentation Protocol 
LPT Local Printer Terminal
LPVS Link Packetized Voice Server 
LQA Line Quality Analysis 
LRAP Long Route Analysis Program 
LRC Longitudinal Redundancy Check 
LRM LAN Reporting Mechanism / Least Recently used Master
LRP Long Range Plan 
LRS Line Repeater Station 
LRSS Long Range Switching Studies 
LRU Least Recently Used (algorithm) 
LS Line Stabilizer 
LS/LC Line Stabilizer / Line Conditioner 
LSA Limited Space-charge Accumulation 
LSAP Link Service Access Point 
LSAPI Licensing Server Application Program Interface 
LS-API Licensing Server Application Program Interface 
LSB Least Significant Bit / Lower Side Band
LSD Least Significant Digit 
LSDU Link Service Data Unit 
LSE Language Sensitive Editor / Local Single-layer Embedded / Local System Environment 
LSEL Link SELector 
LSHMBB Laughing So Hard My Belly is Bouncing
LSHMBH Laughing So Hard My Belly Hurts 
LSHTTARDML Laughing So The Tears Are Running Down My Leg 
LSI Large Scale Integrated (circuitry) / Large Scale Integration
LSL Link Support Layer 
LSLC Line Stabilizer / Line Conditioner 
LSM Logical Storage Manager / Lotus Smart Movie (file format) 
LSN Logical Session Number 
LSP Link State Packet 
LSR Leaf Setup Request 
LSRP Local Switching Replacement Planning (system) 
LSRR Loose Source and Record Route 
LSS Loop Switching System 
LSSU Link Status Signal Unit 
LSV Line Status Verifier 
LT Line Termination 
LTA Line TurnAround 
LTAB Line Test Access Bus 
LTB Last Trunk Busy 
LTC Local Test Cabinet 
LTD Limited / Local Test Desk 
LTDI Learning and Technology Dissemination Initiative 
LTE Line Terminating Entity 
LTF Lightwave Terminating Frame / Line Trunk Frame
LTG Line Trunk Group 
LTIP Laughing Till I Puke
LTM LAN Traffic Monitor 
LTNS Long Time No See
LTP Link Test Pulse 
LTRS Letter Shift 
LTS Laughing To Self / Loss Test Set 
LU Local Use / Logical Unit 
LUA Logical Unit Application 
LUG Local User Group 
LUN Logical Unit Number
LUNI LAN emulation User-to-Network Interface 
LUT Look-Up Table 
LUV Lisp Users and Vendors (conference) 
LUW Logical Units of Work 
LUWAMH Love You With All My Heart
LVM Line Verification Module / Logical Volume Manager 
LWSP Logical White SPace 
LWT Listen While Talk 
LXE Lightguide eXpress Entry
LY Love Ya
LYTB Love you too, babe
LZW Lempel-Ziv-Welch (compression algorithm)
M Mega- / Megabyte / Meter (usually as m) 
M-) See no evil
M/W MicroWave 
M2 Mondo 2000
M3P Microsoft MultiMedia Productions 
MA MA bell / Maintenance Administrator / Milliampere (usually as mA) / Multiplexed Address
MAAP Management And Administration Panels 
MABO Multiplier-Arithmetic Bolt-On
MAC Macintosh Computer / Management and Administrative Computing / Media Access Control / Medium Access Control / Message Authentication / Multi Access Computers / Multiplexed Analog Components 
MACBS Multi-Access Cable Billing System 
MACF Multiple Association Control Function 
MACH Multi-layer ACtuator Head 
MACINTOSH Most Applications Crash; If Not, The Operating System Hangs
MACL Memory Access Control Logic
MACSTAR Multiple Access Customer STAtion Rearrangement 
MACU Multidrop Auto Call Unit 
MADN Multiple Access Directory Numbers 
MAGIK Master Anarchists Giving Illicit Knowledge 
MAH Milliampere-Hour (usually as mAh) 
MAI Masters of Abstractions and Illusions
MAN Metropolitan Area Network 
MAP Modular Arthemetic Processor / Manufacturing Automation Processor / Maintenance and Administration Position / Manufacturing Automation Protocol 
MAPDU Management Application Protocol Data Unit 
MAPHIS Memory Array and Processor for Human Intelligence Stor
MAPI Messaging Application Programming Interface 
MAPS Multiservice Access PlatformS
MAPSS Maintenance & Analysis Plan for Special Services
MAR Microprogram Address Register 
MARC MAchine - Readable Cataloging / Market Analysis of Revenue and Customers System
MARCOM Marketing Communications
MARS Multicast Address Resolution Server/Service 
MAS MAin Store / Mass Announcement System
MASB Mass Announcement System Bus
MASC Mass Announcement System Controller
MASE Message Administration Service Element 
MASM Mass Announcement System Memory
MASS Mid-Atlantic and Southern States 
MATAC MATerial ACquisition 
MATD Maximum Acceptable Transit Delay 
MATFAP Metropolitan Area Transmission Facility Analysis Program
MATR Minimum Average Time Requirement 
MATV Master Antenna Television 
MAU Medium Attachment Unit / Multistation Access Unit 
MAW Microsoft At Work 
MB Megabit (usually as Mb - 1024 kilobytes) / MegaByte (usually as MB) / Memoryless Behavior / MotherBoard 
MB/S Megabits per Second (usually as mb/s) 
MBBS Major Bulletin Board System 
MBG Money Back Guarantee 
MBIT More (data) Bit 
MBOD Manufacturing Board of Directors
MBONE Multicast backBONE
MBPS Megabits Per Second (usually as Mbps) / MegaBytes Per 
MBR Master Boot Record 
MBS Master Boot Sector / Maximum Burst Size
MBT Maximum Burst Tolerance
MBU Manufacturing Business Unit
MBZS Maximum Bandwidth Zero Suppression 
MC MicroChannel (architecture) / Mini Cartridge
MCA Micro Channel Architecture
MCAD Mechanical Computer Aided Design 
MCAM Manufacturing Corporate Account Manager
MCBTY(SN) My Computer is Better than Yours (So Nyerrr)
MCC Master Control Center / Microelectronics and Computer technology Corporation 
MCCS Mechanized Calling Card Service 
MCE Machine Check Exception 
MCESS Mechanical Component Engineering Support Service
MCF MAC Convergence Function 
MCGA Multi-Color Graphics Array/Adaptor
MCH Maintenance CHannel 
MCHB Maintenance CHannel Buffer 
MCI Media Control Interface / Microwave Communications Incorporated /
MCIAS Multi-Channel Intelligent Announcement System 
MCIS Microsoft Commercial Internet System 
MCN Metropolitan Campus Network 
MCO Multiplexer Control Option 
MCP Master Control Program / Microsoft Certified Professional 
MCR Minimum Cell Rate 
MCS Maintenance Control Subsystem / Meeting Communications Service / Microsoft Consulting Services / Multinational Character Set 
MCT Manufacturing Cycle Time 
MCTD Mean Cell Transfer Delay 
MCTRAP Mechanized Customer Trouble Report Analysis Plan/Program
MCU Mobile Control Unit / Multi Chip Unit / Multiport Conferencing Unit 
MCVD Modified Chemical Vapor Deposit 
MD Make Directory (DOS) / Management Domain / Mediation Device / Message Digest / Mobile Data / Multiple Dissemination / Medical Dumbo
MD5 Message Digest 5 (algorithm) 
MDA Monochrome Display Adapter 
MDACS Modular Digital Access Control System 
MDB Microsoft DataBase (usually as .MDB) / Multidimensional DataBase
MDBS Mobile DataBase System 
MDC Manipulation Detecting Code / Marker Distributor Control / Market Distributor Control / McAfee Development Center / Meridian Digital Centrex 
MDCC Mobile Data Capture & Communications 
MDD Marshals of Dynamic Discord
MDDB MultiDimensional DataBase
MDDS Media and Documentation Update Service
MDF Main Distribution Frame 
MDI Medium Dependent Interface 
MDI Multiple Document Interface 
MDIHMLAIGE My dog is humping my leg and i'm getting excited
MDIS Meta Data Interchange Specification 
MD-IS Mobile Data, Intermediate System 
MDK Multimedia Development Kit 
MDP Modem Distribution Panel 
MDR Message Detail Record / Message Detail Recording
MDRAM Multibank Dynamic Random Access Memory
MDS Mail Delivery System / Message Design System(s) / Multiple Dataset System 
MDSE Message Delivery Service Element 
MDSL Medium-bit-rate Digital Subscriber Line
MDT Mobile Data Terminal 
MDTS Modem Diagnostic and Test System 
MDU Marker Decoder Unit 
MDX Modular Digital eXchange 
ME Mapping Entity / Mechanical Engineering / Mutually Exclusive 
MEC Mobile Equipment Console 
MEG Megabyte
MELD Mechanized Engineering and Layout for Distributing Frame
MEM Manufacturing Engineering and Marketing
MEO Medium Earth Orbit (satellite) 
MERS Most Economic Route Selection 
MES Manufacturing Execution System 
MESI Modified, Exclusive, Shared, Invalid
MET Memory Enhancement Technology (usually as MEt) / Multibutton Electronic Telephone 
METI Mailbase Exploring the Internet Workshop 
MF Mediation Function / Medium Frequency / Modulated Frequency / More Fragments / Multi-Frequency / Multiple Frequency 
MFC Microsoft Foundation Class(es)
MFENET Magnetic Fusion Energy NETwork 
MFG More Friendly Garbage / Manufacturing 
MFJ Modification of Final Judgment / Modified Final Judgment
MFLOPS Millions of FLoating point Operations Per Second
MFM Modified Frequency Modulation / Most Favored Nation (trading status) 
MFOTS Military Fiber-Optic Transmission System 
MFP Microsoft Foundation Classes
MFP MultiFunction Peripherals 
MFPS Mathematical Foundations of Programming Semantics 
MFR Multi-Frequency Receivers 
MFS Macintosh File System 
MFT Metallic Facility Terminal 
MFTL My Favourite Toy Language
MFTP Multi-cast File Transfer Protocol
MG MasterGroup 
MGA Monochrome Graphics Adapter 
MGT MasterGroup Translator 
MH Message Handling 
MHBFY My Heart Bleeds For You 
MHD Moving Head Disk 
MHDC(A) My Hard Drive Crashed (Again)
MHOTY my hat's off to you 
MHP Message Handling Protocol 
MHS Message Handling Service / Message Handling System 
MHTS Message Handling Test System 
MHZ Megahertz (usually as MHz) 
MI Machine Interface / Mode Indicate / Multiple Inheritance 
MIB Man In Black, super-secret government agents [X-Philes (fans)] / Management Information Base(s) 
MIC Management Information Center / Management Integration Consortium / Medium Interface Cable / Medium Interface Connector / Memory In Cassette / Microphone / Microsoft Internet Chat / Mode Indicate - Common
MICA Modem ISDN Channel Aggregation
MICE Modular Integrated Communications Environment 
MICR Magnetic Ink Character Recognition 
MICROSOFT Majority In Country Realise Operating System Of Fools & Techheads / Making Imaginative Creations Requires Other Superior Forms Of Faster Technology / Most Idiots Can't Realize: Obsolete Software Organization For Technology / Most Intelligent Customers Realise Our Software Often Fails Terribly / Most Intelligent Customers realise Our Software Only Fools Teenagers. 
MICROTEL Microsoft-Intel
MICS Management Information Conformance Statement 
MID Message ID / Message Identifier 
MIDA Message Interchange for Distributed Application 
MIDAS Manchester Information, Datasets and Associated Services / Master Integrated Distribution Subcontracting Agreement
MIDI Musical Instrument Digital Interface 
MIDR Mosaicked Image Data Record
MIF Management Information File / Master Item File 
MIFF Management Information Format File 
MIG Metal-In-Gap
MII Medium Independent Interface 
MIL Management Information Library 
MILES Merisel's Information and Logistical Efficency System
MILNET Military Network 
MIM Management Information Model 
MIME Multimedia/Multipurpose Internet Mail Extension(s)
MIMG Media Industry Marketing Group
MIN Mobile Identification Number 
MIND Modular Interactive Network Designer 
MINX Multimedia Information Network Exchange 
MIO Modular Input/Output 
MIP Multim In Parvum
MIPL Multimission Image Processing Laboratory/Library
MIPS Meaningless Indication of Processor Speed / Millions of Instructions Per Second / Multimission Image Processing Subsystem
MIR Material Increase Request / Maximum Information Rate / Micro-Instruction Register
mIRC (is defined as) Magnificent Internet Relay Chat (according to `rock in #mIRC Undernet)
MIS Management Information System(s) 
MISCF MISCellaneous Frame 
MISG Market Information Services Group
MIT Management Information Tree / Massachusetts Institute of Technology / Master Installation Tape 
MITI Ministry of International Trade and Industry 
MITS Microcomputer Interactive Test System 
MITV Microsoft Interactive Television 
MJU Multipoint Junction Unit 
MKDIR Make Directory (DOS) 
MLA Multiple Letter Acronym 
MLC MiniLine Card 
MLCD Multi-Line Call Detail 
MLDS Medium Large Disk Systems 
MLHG MultiLine Hunt Group 
MLI Multiple Link Interface 
MLID Multiple Link Interface Driver 
MLN Main Listed Number 
MLP Maynard List Price / MultiLink Procedures / MultiLink Protocol 
MLPC Model Level planning Committee
MLPP MultiLevel Precedence and Preemption 
MLPPP MultiLink Point to Point Protocol
MLR Multichannel Linear Recording
MLS Multi-Level Security 
MLT Mechanized Loop Testing / Multiple Logical Terminals 
MM Millimeter (usually as mm) / Multimedia 
MMAC MultiMedia Access Center 
MMC Mickey Mouse Club / Minicomputer Maintenance Center / Multimedia Marketing Council 
MMCD MultiMedia Compact Disc (format) 
MMD MultiMedia Document 
MMDF Multi-channel Memorandum Distribution Facility 
MMDS Multipoint Multichannel Distribution Service
MMF MultiMode Fiber / MultiMode Fiberoptic (cable) 
MMFS Manufacturing Message Format Standard 
MMGT Multimaster Group Translator
MMHS Military Message Handling System 
MMI Man Machine Interface 
MMIF My Mouth Is Full
MMJ Modified Modular Jack 
MML Man - Machine Language 
MMOC Minicomputer Maintenance Operations Center 
MMS Main Memory Status / Manufacturing Message Service/Standard / Manufacturing Messaging Specification / Memory Management System / Modular Measurement System
MMT Multimedia Multiparty Teleconferencing 
MMU Memory Management Unit 
MMX Mastergroup Multiplex(er) / Multimedia Extension(s)
MNCS Multipoint Network Control System 
MNDS Multi-Network Design System 
MNP Microcom Networking Protocol 
MO Magneto-Optical / Managed Object 
MOAC Message Origin Authentication Check 
MOAT Mother Of All Tests 
MOB Men Of Business 
MOC Manufacturing Outreach Center 
MOCA Merisel Open Computing Alliance
MOCS Managed-Object Conformance Statement 
MOD Masters Of Deception/Destruction/Disaster 
MODEM MOdulator-DEModulator
MOF Master Order Form 
MOG Minicomputer Operations Group 
MOL Microsoft Open License
MOLAP Multidimensional OnLine Analytical Processing
MOLI Microsoft OnLine Institute 
MOM Manager-Of-Manager / Message Oriented Middleware / Microsoft Office Manager
MOMPL one MOMent PLease... 
MOMV Manned Orbital Maneuvering Vehicle 
MOO MUD, Object Oriented / Multi-user dungeon Object-Oriented 
MOP Maintenance Operations Protocol 
MORF Male OR Female (usually as MorF) 
MOS Material Order System / Metal Oxide Semiconductor 
MOSFET Metal Oxide Semiconductor Field Effect Transistor 
MOSIS Metal Oxide Semiconductor Implementation System
MOSPF Multicast Open Shortest Path First
MOSS MIME Object Security Services
MOST Metal Oxide Semiconductor Transistor
MOT Managed Object to Test / Masters Of Technology / Means Of Testing 
MOTAS Member Of The Appropriate Sex
MOTD Message of the day
MOTIS Message Oriented Text Interchange System 
MOTOS Member Of The Opposite Sex
MOTSS Member Of The Same Sex
MoU Memorandum of Understanding 
MOV Metal Oxide Varistor 
MP Machine Processable / Managing Process / Modem Port / Multilink Protocol / Multi-Processor 
MPC Mathematics of Program Construction / Multimedia Personal Computer 
MPCC MultiProtocol Communications Controller 
MPCH Main Parallel CHannel 
MPD Mini Port Driver
MPDT Multi-Peer Data Transmission 
MPDU Message Protocol Data Unit 
MPE MultiProgramming Executive 
MPEG Motion Picture Expert's Group 
MPF Multilink Packet Fragmentation 
MPI Message Passing Interface / Multiple Protocol Interface 
MPL Multi-schedule Private Line 
MPLS Multi-Protocol Label Switching 
MPME Manufacturing Process and Material Engineering
MPOA Multiple Protocol Over ATM / MultiProtocol Over ATM 
MPOW Multiple Purpose Operator Workstation 
MPP Massively Parallel Processor(ing) / Multilink Point-to-point Protocol
MPPD Multi-Purpose Peripheral Device 
MPR Multiple Provider Router / Multi-Port Repeater / Multi-Protocol Router 
MPS Master Production Schedule / Multi-Processor Specification
MPSA MultiProcessor Server Architecture 
MPSC Manufacturing Planning and Control Systems
MPT Ministry of Posts and Telecommunications 
MPTM Multi-Parity Test Method 
MPW Macintosh Programmers' Workshop 
MPX MultiPleXer 
MQ Message Queing 
MQI Message Queuing Interface 
MR (modem) Modem Ready / Magneto-Resistive / Message Retrieval 
MRAA Meter Reading Access Arrangement 
MRAM Multibank Random Access Memory 
MRB Multiple Resolution Bitmaps (usually as .MRB) 
MRC Management Response Center / Manufacturing Resource Center / Market Research Center / Medical Research Council 
MRCS Multi-Rate Circuit Switching 
MRF Maintenance Reset Function 
MRI Magnetic Resonance Imaging 
MRM Maximum Rights Mask / Most Recently used Master
MRO Multi-Region Operation 
MRP Manufacturing Resource Planning 
MRSE Message Retrieval Service Element 
MRX Magneto-Resistive eXtended
MS Maintenance State / Message Store / Meta Signaling / Microsoft / Microsoft System(s) / Milli-seconds (usually as ms) / More Segments 
MSAP MAC Service Access Point 
MSAT Mobile SATellite 
MSAU Multi-Station Access Unit 
MSB Mid-Range Systems Business / Most Significant Bit / Most Significant Byte 
MSC Media Stimulated Calling 
MSCDEX Microsoft Compact Disc Extensions 
MSCP Mass Storage Control Protocol 
MSD Micro Systems Development / Microsoft Diagnotic / Microwave Semiconductor Device / Most Significant Digit 
MSDL Microsoft Download (service) 
MSDN Microsoft Developer Network 
MSDOS MicroSoft Disk Operating System 
MS-DOS Microsoft Disk Operating System 
MSDS Material Safety Data Sheet 
MSF Measurement Summarization Function 
MSFC Marshall Space Flight Center
MSG Message 
MSI Medium Scale Integration / Mustang Software, Inc. 
MSJ Microsoft Systems Journal 
MSL Microsoft Library / Mirrored-Server Link 
MSM Matrix Switch Module 
MSN Microsoft Network / Monitoring cell Sequence Number / Multiple Subscriber Number 
MSO Mobile Switching Office / Multiple System(s) Operator(s) 
MSP Message Security Protocol 
MSPM Manufacturing System Program Manager
MSR Model-Specific Registers
MSRP Manufacturer's Suggested Retail Price 
MSS Maritime Satellite Service / Metropolitan Switching System / Mobile Satellite Service / Modem Substitution Switch / Multiprotocol Switched Services 
MSSC Marketing Sales Strategy Committee
MSSE Message Submission Service Element 
MSSSE Message Submission and Storage Service Element 
MST Minimum Spanning Tree 
MSTP Multimission Software Transmission Project
MSTS MicroSoft Terminal Server
MSU Message Signal Unit / Microsoft University / Modem Sharing Unit 
MSVC Meta-Signaling Virtual Channel 
MT Measured Time / Mitel
MTA Mail Transfer / Mail Transfer Agent / Major Trading Area / Message Transfer Agent 
MTAE Message Transfer Agent Entity 
MTAU Metallic Test Access Unit 
MTB Magnetic Tape Billing 
MTBF Mean Time Before Failure / Mean Time Between Failure(s)
MTBSI Mean Time Between System Interruptions 
MTC Manufacturing Technology Center 
MTCN Minimum Throughput Class Negotiation 
MTEBBS Maryland Technology Education Bulletin Board Service 
MTF Master Test Frame / More To Follow
MTFBWY May The Force Be With You 
MTL Message Transfer Layer 
MTOS MultiTasking Operating System
MTP Message Transfer Part (SS7) / Message Transfer Protocol
MTR Mechanized Time Reporting 
MTS Message Telecommunications Service / Message Telephone / Message Transfer Service / Message Transfer System / Message Transport Service / Microsoft Transaction Server / Mobile Telephone Service 
MTSE Message Transfer Service Element 
MTSL Message Transfer SubLayer 
MTSO Mobile Telephone Switching Office 
MTTA Multi-Tenant Telecommunications Association 
MTTR Mean Time To Repair 
MTU Maintenance Termination Unit / Maximum Transmission Unit / Media Tech Unit / Message Transfer Unit 
MTX Mobile Telephone Exchange 
MU Message Unit 
MUA Mail User Agent
MUAA Modem User's Association of America 
MUD Multi/Multiple User Dungeon / Multi-User Dimension (games) / Multi-User Dimensions / Multi-User Domain 
MUF Maximum Usable Frequency 
MUG Multi User Game
MULDEM Multiplexer/Demultiplexer
MULTICS Multiplexed Information and Computing Service 
MUP Multiple Uniform naming convention Provider 
MUS MultiUser System 
MUSH Multi-User Shared Hallucination 
MUX Multiplexer 
MV Millivolt (usually as mV) 
MVB MicroVax Business 
MVID Major Vector ID 
MVIP Multi-Vendor Integration Protocol 
MVP Modular Voice Processor / Multiline Variety Package 
MVS Multiple Virtual Storage
MVS/ESA Multiple Virtual Storage / Enterprise Systems Architecture
MVS/SP Multiple Virtual Storage / System Product
MVS/TSO Multiple Virtual Storage/Time Sharing Option 
MVS/XA Multiple Virtual Storage / eXtended Architecture
MW MicroWave / MilliWatt (usually as mW) / MultiWink 
MWI Message Waiting Indicator 
MWN Message Waiting Notification
MX Mail Exchange (record) / Mail Exchanger 
MXU MultipleXer Unit
MYOB Mind Your Own Business
N Normal 
N/A Not Acceptable 
N/A Not Acceptable / Not Applicable 
NA Next Address / Not Acceptable / Not Applicable / Numerical Aperture 
NAA Newspaper Association of America 
NAA! Not Another Acronym!
NAC Network Access Controller / Network Administration Center / Network Applications Consortium / Networks And Communications / New Age Crackers 
NACHA National Automated Clearing House Association 
NACK Negative Acknowledgement
NACM Networks and Communications Marketing
NACOMEX National Computer Exchange 
NACS NetWare Asynchronous Communications Server / Novell As
NADF North American Directory Forum 
NADT Not A Darn Thing
NAEB North American EDIFACT Board 
NAEC Novell Authorized Education Center 
NAG Network Architecture Group 
NAK Negative AcKnowledgment (ASCII) 
NAL Netware Application Launcher 
NALOPKT Not A Lot Of People Know That
NAM Network Access Method / Number Assignment Module
NAMAS National Measurement Accreditation Services 
NAMS Network Analysis and Management System 
NAMTUG North American MAP/TOP Users' Group 
NAN National Area Network 
NAND Not-And Gate
NANP North American Numbering Plan 
NAP Network Access Point
NAPE National Pirate Exchange (usually as NaPE) 
NAPL National Association of Printers and Lithographers 
NAPLPS North American Presentation Level Protocol Syntax
NAPPA Northern American Phreakers/Piraters Association 
NARC Nuclear Phreakers/Hackers/Carders 
NARUC National Association of Regulatory Utilities Commissio
NAS Network Application Support / Numerical and Atmospheric Sciences (network) 
NASA National Aeronautics and Space Administration 
NASI NetWare Asynchronous Services Interface 
NASM Named Account Sales Manager
NASTD National Association of State Telecommunications Direc
NAT Network Address Translation 
NATA National Association of Testing Authorities 
NATD National Association of Telecommunications Dealers 
NATOA National Association of Telecommunication Officers and
NAU Network Access Unit / Network Addressable Unit 
NAUN Nearest Active Upstream Neighbor / Nearest Addressable
NBB Number of Bytes of Binary
NBD No Big Deal 
NBEC Non-Bell Exchange Carrier 
NBEUI Network BIOS Extended User Interface
NBIF No basis in fact
NBL Not bloody likely
NBMA Non-Broadcast Multiple Access 
NBNS NetBIOS Name Server 
NBP Name Binding Protocol / NetBIOS Protocol 
NBS National Bureau of Standards 
NC Network Channel / Network Computer / Network Connection / no comment
NCA Network Computing Architecture 
NCAIR National Center for Automated Information Research 
NCB Network Control Block 
NCC National Computing Center / Network Control Center / Norwegian Cracking Company
NCCF Network Communications Control Facility 
NCF NetWare Command File 
NCI Network Channel Interface 
NCIA Native Client Interface Architecture 
NCIC National Crime Information Center/Computer / Network Control Interface Channel 
NCL Network Control Language 
NCM Network Connection Management / Node Controller Module 
NCMOS N-channel Complementary Metal Oxide Semiconductor
NCMS Network Control and Management System 
NCP NetWare Core Protocol / Network Control Point/Program 
NCPS Netware Cross-Platform Services / Novell Cross Platform Services 
NCR National Cash Register 
NCS National Communications System / Network Computing System / Network Control System 
NCSA National Center for Supercomput(er)(ing) Applications / National Computer Security Association 
NCSC National Computer Security Center 
NCSI Network Communications Services Interface 
NCSL National Computer Systems Laboratory 
NCT Network Control Terminal 
NCTE Network Channel Terminating/Termination Equipment 
NCUG National Centrex Users' Group 
ND Network Digit 
NDA National Directory Assistance / Network Delivery Access / NonDisclosure Agreement 
NDC Network Data Collection 
NDCC Network Data Collection Center 
NDD NetWare Directory Database 
NDIAG Norton Diagnostics
NDIS Network Device Interface Specification
NDL Network Database Language 
NDM Network Database Managment 
NDMP Network Data Management Protocol
NDMS NetWare Distributed Management Services 
NDN National Distribution Network / Non-Delivery Notification 
NDPS NetWare Distributed Printing Services 
NDR Network Data Representation 
NDS NetWare Directory Services / Network Data System / Novell Directory Service 
NDT Net Data Throughput / No Dead Trees 
NDTS Network Diagnostic and Test System 
NDU Network Device Utility 
NE Network Element 
NEAP Novell Education Academic Partner 
NEARNET New England Academic and Research Network
NEAS North East Atlantic States
NEAT Novell Easy Administration Tool
NEBS New/Network Equipment Building System 
NEC National Electric Code / Nippon Electronic Company 
NEF Network Element Function 
NEMA National Electrical Manufacturers Association 
NEP Noise Equivalent Power 
NERC Natural Environment Research Council 
NERD National Establishment for Real Dorks
NES Net Equipment Sales
NESAC National Electronic Switching Assistance Center 
NESC National Electric Safety Code 
NESS Network of European Ship-building Students 
NET (The) Internet (sometimes as The NET) / Network (as high level domain .net) / Network Entity Title / Norme Europeenne de Telecommunications (European)
NETBEUI Network Basic input/output system Extended User Interface
NETBIOS Network Basic Input/Output System 
NETDDE Network Dynamic Data Exchange (usually as NetDDE)
NETIPC Network InterProcess Communication 
NEUA National Elite Underground Alliance 
NEWS Network Error Warning System / Novell Electronic Webcasting Service
NEXT Near End X-Talk / Near-End Cross Talk 
NF Not Finished 
NFA No Flaming Allowed
NFF No Form Feed 
NFI no friggin' idea 
NFS Network File System 
NFSP National Federation of Software Pirates 
NFT Network File Transfer 
NFW No F**king Way 
NFWM No Fu**ing Way Man!
NFX (The) New Fone Express (magazine) 
NGI Next-Generation Internet
NH Nazi Hackers / Non-busy Hour 
NHAS New Hampshire Administrative Services
NHOB Non-specific Hierarchical Operational Binding 
NHR Non Hierarchical Routing 
NHRP Next Hop Resolution Protocol / Next Hop Routing Protocol / Non-Hierarchical Routing Protocol
NHTSA National Highway Traffic Safety Administration
NI National ISDN (sometimes as NI-1) / Network Interconnect / Network Interface 
NI-1 National ISDN 1 
NIA Network Information Access (newsletter) 
NIC Network Information Center / Network Interface Card 
NICAD Nickel Cadmium (usually as NiCad) 
NICD NIckel CaDium (usually NiCd)
NICE Network Information and Control Exchange 
NID Network Interface Device 
NIDL Network Interface Definition Language 
NIFOC Nude In Front Of Computer
NIFOK Naked In Front of the Keyboard
NIGGER now I've gotto go eveict Racists
NIH National Institutes of Health
NII National Information Infrastructure 
NIIT National Information Infrastructure Testbed (coalition
NIM Network Interface Module 
NIMBY Not in My Back Yard
NiMH Nickel Metal Hydride
NIMH Nickel Metal Hydride (usually as NiMH) 
NIMH NIckel Metal Hydroxide
NIMS Near Infrared Mapping Spectrometer
NIOD Network Inward/Outward Dialing 
NIOS NetWare Input/Output System 
NIPS Neural Information Processing Systems 
NIR Networked Information Retrieval 
NIRF Near Infrared Fluorophores 
NIS Names Infomation Socket / National Information System / Network Information Service 
NISDN Narrowband Integrated Services Digital Network 
N-ISDN Narrowband Integrated Services Digital Network 
NISE Network Installation Service Engineer 
NISO National Information Standards Organization 
NISP Networked Information Services Project 
NISS National Information Services and Systems 
NIST National Institute of Standards and Technology 
NIST-APP National Institute of Standards and Technology Applica
NIU Network Interface Unit 
NIUF North american ISDN Users' Forum 
NJE Network Job Entry 
NJTH Not Just Thinking Here
NL Network Layer 
NLB Number of Lines of Binary
NLDM Network Logical Data Manager 
NLM NetWare Loadable Module(s) 
NLP Name Lookup Protocol / Natural Language Processing
NLPID Network Layer Protocol IDentifier 
NLQ Near-Letter Quality 
NLS National Language Support / oNLine Service / Online System
NLSP NetWare Link Service Protocol 
NM Never mind / Nanometer (usually as Nm) / Network Management / Network Module
NMA NetWare Management Agent / Network Management Architecture 
NMC Network Management Center 
NMCC Network Management Control Center 
NME Network Management Entity 
NMF Network Management Forum 
NMI Nautilus Memory Interconnect / Nonmaskable Interrupt / Non-Maskable Interrupt
NMO Network Management Option 
NMOS Negative-channel Metal Oxide Semiconductor
NMP Network Management Protocol 
NMR NetWare Management Responder / Normal Mode Rejection 
NMS NetWare Management System / Network Management System 
NMSIG Network Management Special Interest Group 
NMVT Network Management Vector Transport 
NN Negative Notification 
NND National Number Dialing 
NNF National Nanofabrication Facility 
NNI Netherlands Normatization Institute / Network Node Interface / Network to Network Interface
NNM Network Node Manager 
NNS NetWare Name Service 
NNTP Network News Transport/Transfer Protocol 
NNX Network Numbering Exchange 
NOAA National Oceanographic and Atmospheric Administration
NOC Network Operations Center 
NOCS Network Operations Center System 
NOF Network Operations Forum / Not On File
NOMS Not on MY System
NOOP Network OSI OPerations 
NOR Net Operating Revenue
NORAD North American Defense Command
NORGEN Network Operations Report GENerator 
NOS Network Operating System 
NOT Nation Of Thieves (usually as NOT!) 
NOT! Nation Of Thieves
NOTIS Network Operator Trouble Information System 
NOYB - None Of Your Business 
NP No Problem / Network Performance / Network Provider / New Project 
NPA National Phreaker's Alliance / Northern Phreaker's Alliance / NetWare Peripheral Architecture / Network Professional Association / No Power Alarm / Number Planning Area / Numbering Plan Area
NPAI Network Protocol Address Information 
NPAP Network Printing Alliance Protocol 
NPC Network Parameter Control / North Pacific Cable / Northern Phun (Phreaker Hacker Underground Network) Company
NPDA Network Problem Determination Application 
NPDU Network Protocol Data Unit 
NPF Network Partitioning Facility 
NPIP New Product Integration Process
NPL National Physical Laboratory 
NPM NetView Performance Monitor 
NPN Notes Public Network 
NPO New Product Operations
NPR National Performance Review / Network Process Engineering / Normal Priority Request 
NPRM Notice of Proposed Rule Making 
NPSI Network Packet Switch Interface 
NPSS NASA Packet Switching System
NPSU New Product Start Up
NPTN National Public Telecomputing Network 
NPV Net Present Value 
NRC National Research Council / No-Read Checking 
NRCS National Replacement Character Set 
NREN National Research and Education Network 
NRM Network Resource Management 
NRN No reply necessary / Novell Remote Network
NRS Name Registration Scheme 
NRT Non-Real Time
NRZ Non-Return to Zero (signaling) 
NRZI Non - Return to Zero, Inverted 
NRZ-L Non - Return to Zero - Level 
NRZL Non-Return to Zero Level 
NS Nanosecond (usually as ns) / Network Service 
NSA National Security Agency / National Security Anarchists / Next Station Addressing 
NSAG Netskills Advisory Group 
NSAI National Standards Authority of Ireland 
NSAP Network Service(s) Access Point 
NSAPI Netscape Server Application Programming Interface
NSC National Security Council / National Semiconductor / Network Service Center 
NSCS Network Service Center System 
NSDD National Security Decision Directive 
NSE (Novell) Network Support Encyclopedia 
NSEC Network Switching Engineering Center 
NSEL Network SELector 
NSEP National Security and Emergency Preparedness 
NSF National Science Foundation 
NSFNET National Science Foundation NETwork 
NSI (RPC) Name Service Independent / NASA Science Internet / Network Solutions, Inc. 
NSM Network Systems Management
NSO National Standards Organization 
NSP National Service Provider / NATO Standardized Profile / Network Service Part (SS7) / Network Services Protocol 
NSPMP Network Switching Performance Measurement Plan 
NSR Non-Source Routed 
NSS No Shit, Shylock / Nodal Switching System 
NSSDU Normal Session Service Data Unit 
NSSG Netskills Steering Group 
NSSII Network Supervisory System II 
NSSR Non - Specific Subordinate Reference 
NSTL National Software Testing Laboratories 
NT Nested Task (flag) / Network Termination / New Technology (as in Windows NT) / Network Terminal / Northern Telecom 
NTA Nokturnal Trading Alliance 
NTAS (Windows) New Technology Advanced Server 
NTD Network Tools for Design 
NTE Network Terminal Equipment 
NTEC Network Technical Equipment Center 
NTFS (Windows) NT File System / New Technology File System 
NTFS NT File System
NTI New Technologies/Technology Initiative / Novell Technology Institute 
NTIA National Telecommunications and Information Administration/Agency
NTIS National Technical Information Service 
NTISSC National Telecommunications and Information Systems Steering
NTK Nice To Know 
NTL Nevertheless
NTLM NT Lan Manager
NTM Network Traffic Management 
NTMP Network Training Materials Project 
NTN Network Terminal Number 
NTP Network Time Protocol 
NTPF Number of Terminals Per Failure 
NTS Network Technical Support / Network Test System / Network Tracking System 
NTSA Networking Technical Support Alliance 
NTSC National Television Standards Committee / New Technologies Sub-Committee 
NTT Nippon Telegraph and Telephone / Numbered Test Trunk
NTTAWWT not that there's anything wrong with that 
NTU Network Terminating Unit 
NUA Network User Address / Network Users' Association 
NUCFS NetWare UNIX Client File System 
NUI NetWare Users International / Network User Identification / Network User Interface
NUMA Non-Uniform Memory Access (architecture) 
NUNP No Users, No Problems
NUP New User Password 
NURBS NonUniform Rational B-Spline 
NUS National Union of Students
NVE Network Visible Entity 
NVLAP National Voluntary Laboratory Accreditation Program 
NVN National Videtex Network
NVP Nominal Velocity of Propagation 
NVRAM Nonvolatile Random Access Memory 
NVRAM Non-Volatile Random Access Memory
NVT Novell Virtual Terminal 
NVTS Network Virtual Terminal Service 
NWG Network Working Group
NWI New Work Item 
NWSS Networks & Site Services
NYC New York Crackers 
NYCTMI Now You Come To Mention It 
NYNEX New York - New England Exchange / New York, New England and the unknown (X) 
NYSERNET New York State Education and Research Network 
NYSHII New York Safe House II
O Organization 
O/S Operating System
O:) Angel(ic) / Halo 
O:-) Angel(ic) / Halo
O:O A girl is mooning you 
O--< Fishy
O2 Object Oriented 
OA Office Automation / Order Administration / Order Administration
OA&M Operations Administration & Maintainance
OAG Open Applications Group 
OAGEE Official Airlines Guide Electronic Edition 
OAM Operations, Administration and Maintenance 
OAM&P Operation, Administration, Maintenance, and Provisioni
OAO Over And Out
OARS On a Related Subject
OASYS Office Automation SYStem 
OATUS On a Totally Unrelated Subject
OAUS on an unrelated subject 
Ob- [as a prefix] obligatory 
Ob Ob- [as a prefix] obligatory / Out of Bounds
OBE Overtaken By Events 
Objoke Obligatory joke 
OBTW Oh, by the way 
OBU Option Business Unit
OC Operator Centralization 
OCAP Orange Cats Are Pretty
OCC Other Common Carrier 
OCD Out of Cell Delineation 
OCE Open Collaboration Environment / Other Common carrier channel Equipment / Other Common Equipment
OCF Object Components Framework 
OCIRYITM Of course i'll respect you in the morning
OCIS Organized Crime Information Systems 
OCLC Online Computer Library Catalog 
OCPS Open Content Publisher Standard 
OCR Optical Character Reader / Optical Character Recognition
OCRC Option Change Review Committee
OCS Original ChipSet, the first custom chipset for the amiga.
OCU Office Channel Unit 
OCX OLE Custom control
OD Outdial
ODA Office Document Architecture 
ODAC Operations Distribution Administration Center 
ODBC Open Database Compliant/Connectivity 
ODD Operator Distance Dialing 
ODDD Operator Direct Distance Dialing 
ODI Open Data Interface / Open Data-link Interface 
ODMA Open Document Management API 
ODMG Object Database Management Group
ODN OutDial Notification
ODS Optical Data Systems/Stream 
ODSI Open Directory Service Interface
OEM Original Equipment Manufacturer
OEMF Open Element Management Framework 
OF Overflow 
OFB (K-bit) Output Feedback 
OFC Open Financial Connectivity (specification) 
OFDM Orthogonal Frequency Division Multiplexing
OFG Originally Funny Guys
OFNPS Outstate Facility Network Planning System 
OGT OutGoing Trunk 
OGT Out-Going Trunk
OGVT OutGoing Verification Trunk 
OH (modem) Off Hook 
OHP OverHead Projection (film) 
OIC - Oh, I See 
OIC Oh I see
OIC Oh, I See 
OIC Oh, I See! 
OIP Opportunity Investment Planning
OIS Office and Information Systems
OJT On the Job Training 
OL Old Lady (significant other)
OL Ordered List
OLAP OnLine Analytical Processing
OLAP On-Line Analytical Processing 
OLE Object Linking and Embedding 
OLI Originating Line Information 
OLTM Optical Line Terminating Multiplexer 
O-LTM Optical Line Terminating Multiplexer 
OLTP OnLine Transaction Processing
OLTP On-Line Transaction Processing 
OLX Off-Line eXpress 
OM Old Man (significant other)
OMA Object Management Architecture
OMC Office of Munitions Control
OMG Oh My God / Object Management Group (model) 
OML Open Modeling Language 
OMM Output Message Manual 
OMNI Organising Medical Networked Information 
OMPF Operation and Maintenance Processor Frame 
OMR Optical Mark Recognition
OMT Object Modeling Technique 
ONAC Operations Network Administration Center 
ONAL Off Network Access Line 
ONAW Oh No! Another Wedgie
ONE Open Network Environment
ONI Operator Number Identification 
ONLY Used by shareware authors who over-price, ie. "Only $99.95." 
ONMS Open Network Management System
ONNA Oh No, Not Again
ONNTA Oh No, Not This Again
ONU Optical Networking Unit
OO Object Orientation/Oriented 
OOB Out Of Band(width)
OOC Out Of Character
OOD Office of Development (Central Engineering)
OODBMS Object-Oriented DataBase Management System
OODCE Object Oriented Distributed Computing Environment 
OOF Out Of Frame 
OOFNet Our Own Fucking Net
OOI Out Of Interest 
OOO Out Of Order 
OOP Object Oriented Programming 
OOPSLA Object Oriented Programming Systems, Language and Appl
OOSOOM Out of Sight, Out of Mind
OOT Object Oriented Technology 
OOTB Out Of The Box (brand new)
OOTC Obligatory On-Topic Comment
OOUI Object Oriented User Interface 
OP Operator / Option / Outside Plant 
OPAC On-line Public Access Catalogue 
OPAL On-line Presentation Access Library 
OPC Organic Photoconducting Cartridge / Originating Point Codes 
OPCR Operator Actions Program / Original Program Clock Reference 
OPEN Open Protocol Enhanced Networks 
OPEOS Outside Plant Engineering and Operations System
OPI Open Prepress Interface 
OPL Organizer Programming Language
OPM Outage Performance Monitoring / Outside Plant Module 
OPOM Organizational Program Office Manager
OPOS OLE for Point Of Sale 
OPS Off Premises Station 
OPS Operations / Oracle Parallel Server 
OPSM Outside Plant Subscriber Module 
OPT Open Protocol Technology
OPX Off Premises eXtension 
OQR Object Query Language
OQS Object Query Service
OR Originating Register 
ORB Object Request Broker / Office Repeater Bay 
ORDBMS Object-Relational DataBase Management System
ORG Organization (usually as .org) 
ORM Object Role Modeling / Optical Remote Module 
ORMS Operating Resource Management System
ORPC Object Remote Procedure Call
ORSD Object Registration Service Daemon (usually as orsd) 
OS Operating System / Operator Service / Output Spy (ITS) / OutState 
OS/2 Half an Operating System / Obsolete Soon, Too. / Operating System/2 
O-S-< In a hurry
OSAC Operator Services Assistance Center 
OSC Operator Services Center / OSCillator 
OSCA Open Systems Color Association 
OSD Open Software Description 
OSDS Operating System for Distributed Switching 
OSE Open Systems Environment / Open Software Foundation / Operations System Function 
OSF/DCE Open Software Foundation Distributed Computing Environ
OSI Open Systems Interconnect(ion) / Open Standards Interconnect(ion) / 
OSID Originating Signaling Identifier 
OSIE Open Systems Interconnection Environment 
OSINET Open Systems Interconnection NETwork 
OSIRM Open Systems Interconnection Reference Model 
OSM OS Specific Module
OSME Open Systems Message Exchange 
OSO Originating Signaling Office 
OSP Office of Sales Programs / OutSide Plant 
OSPF Open Shortest Path First (protocol) 
OSPS Operator Service Position System 
OSR OEM Service Release / OEM System Release / Operating System-Specific / Operational Support System/Services / Operator Service(s) System 
OSSWG Office System Standards Work Group 
OST Originating Station Treatment
OSTA Optical Storage Technology Association 
OSTC Open Systems Testing Consortium 
OSTP Office of Science and Technology Policy 
OSWS Operating System WorkStation 
OT Off topic / Open Transport
OTA Office of Technology Assessment 
OTB Off to bed
OTC Over the Counter / Operating Telephone Company 
OTD Off the Dock
OTDR Optical Time Domain Reflectometer(s)
OTE Off Track Excursion / Off Track Experience 
OTF On the Floor / Object Testing Framework 
OTFM Only the Facts, Mam
OTL Out To Lunch / OSI Testing Liaison 
OTM Object Transaction Monitor
OTOH On The Other Hand 
OTOOH On The Other Other Hand 
OTP One Time Programmable / Order Transaction Processing 
OTQ Out-going Trunk Queuing 
OTR Operational Trouble Report
OTS Off The Shelf 
OTT Over The Top
OTTH On the third hand 
OTTOMH Off the Top of My Head
OTTOMHAROOB Off the Top of My Head and Rolling Out of Bounds
OTW On the Whole
OU Organizational Unit 
OUI Organization Unique Identifier / Organizational Unit I
OURS Open User Recommended Solutions (user group) 
OUTWATS OUTward Wide Area Telecommunications Service 
OV OpenView 
OVD Optical Video Disk 
OVDA Optical Video Disc Association 
OW Over-Write
OWF One-Way Function / Optimum Working Frequency 
OWL Object Windows Library 
OWRTS Open - Wire Radio Transmission System 
OWTL Open - Wire Transmission Line
OWTTE Or Words to that Effect
O-Z-< In a big hurry
P&L Profit and Loss
P&P Peace and Protection
P&S Publish and Subscribe
P.S Post Scriptum 
P.S. Post Scriptum 
P/AR Peak-to-Average Radio
P/F Poll / Final bit 
P/H/A Phreakers / Hackers / Anarchists 
PA Power Alarm / Precision Architecture (RISC) / Program Address / Public Address 
PAA Peer Access Approved 
PABG Pack a Big Gun 
PABX Private Automatic Branch Exchange 
PAC Point-And-Click / Pricing and Announcement Committee / Privilege Access Certificate 
PACCEPT Presentation Accept 
PACE Program for Arrangement of Cables and Equipment 
PACS Personal Access Communications System / Picture Archiving and Communication System 
PACT Prefix Access Code Translator 
PAD Packet Assembler-Disassembler / Packet Assembly/Disassembly
PADSX Partially Automated Digital Signal Cross-Connect
PAE Page Address Extensions / Peer Access Enforcement 
PAEB Pan - American EDIFACT Board 
PAG Phreaks Against Geeks 
PAGODA Profile Alignment Group for Office Document Architecture
PAIN Pirating Artistically Intrepid Newsmongers
PAL Phase Alteration Standard / Phase Alternating Line / Programmable Array Logic 
PAM Peachtree Accounting - Macintosh / Pulse Amplitude Modulation 
PAN Peripheral Area Network / Personal Account Number 
PANS Pretty Advanced New Stuff 
PAP Password Authentication Protocol / Practical Applications of Prolog / Printer Access Protocol 
PAPAG Phreaks Against Phreaks Against Geeks 
PAR Peak-to-Average Ratio / Positive Acknowledgment with Retransmission 
PARADISE Piloting A Researcher's Directory Service in Europe 
PARC Palo Alto Research Center (Xerox PARC)
PAS Public Announcement Service/System / Public Available Standards / Publicly Available Submitter
PASI Production, Availability, Shipments, Inventory 
PAT Power Alarm Test 
PATS Parameterized Abstract Test Suite 
PAW Peachtree Accounting for Windows / Pirates Analyze Warez
PAX Private Automatic Exchange 
PB Pacific Brigade 
PBC Peripheral Bus Computer / Pipelined Burst Cache / Processor Bus Controller 
PBD Pacific Bell Directory 
PBGA Plastic Ball Grid Array
PBIS Peachtree Business Internet Suite
PBKAC Problem Between Keyboard and Chair
PBM Product Business Manager
PBMS Pacific Bell Mobile Services
PBNI Pacific Bell Network Integration 
PBS Portable Base Station
PBT Profit Before Tax
PBU Product Business Unit
PBX Personal/Private/Product/Public Branch Exchange 
PC Personal Computer / Politically correct / Primary Center / Priority Control / Production Control / Protocol Control 
PCA Peachtree Complete Accounting / Performance and Coverage Analyzer
PCAMI Personal Computing Asset Management Institute 
PCB Printed Circuit Board 
PCD Page Cache Disable (pins) 
PCDA Program Controlled Data Acquisition 
PCDOS Personal Computer Disk Operating System
PC-DOS Personal Computer Disk Operating System 
PCE Presentation Connection Endpoint 
PCEI Presentation Connection Endpoint Identifier 
PCEO Personal Computer Enhancement Operation 
PCEP Presentation Connection EndPoint 
PCFC Polytechnics and Colleges Funding Councils 
PCH Parallel CHannel 
PCI Peripheral Component Interconnect / Presentation Context Identifier / Program Controlled Interruption / Personal Computer Interface / Protocol Control Information 
PCL Printer Control Language 
PCM Plug Compatible Manufacturer / Product Capacity Manager / Profit Contribution Margin / Pulse Code Modulation 
PCMCIA People Can't Memorize Computer Industry Acronyms / Personal Computer Memory Card International Association
PCN Personal Communications Networks 
PCO Peg Count and Overflow 
PCO Point of Control and Observation 
PCONNECT Presentation Connect 
PCP PC Pursuit / Pyscho Corporate Productions
PCPM Programmable Call Progress Monitoring 
PCR Peak Cell Rate / Personal Computer Rats / Post Call Ratio / Program Clock Reference / Personal Communication System / Proxy Cache Server / Personal Communications Services / Personal Conferencing Standard / Plastic Clad Silica 
PCSA Personal Computer(ing) System Architecture
PCSG Personal Computing Systems Group
PCSN Private Circuit - Switching Network 
PCTE Portable Common Tool Environment 
PCTR Protocol Conformance Test Report 
PCTV Program Controlled TransVerters 
PCU Packet Control Unit 
PCWG Personal Conferencing Work Group 
PCYLIHOONL Please Cross Your Legs, I Have Only One Nail Left 
PD Packetization Delay / Peripheral Decoder / Phase-Change - Dual / Physical Delivery / Public domain 
PDA Personal Digital Assistant / Public Display of Affection 
PDAD Proposed Draft ADdendum 
PDAM Proposed Draft AMendment 
PDAU Physical Delivery Access Unit 
PDC Primary Domain Controller 
PDES Product Data Exchange Standard 
PDF Portable Document File / Portable Document Format / Power Distribution Frame 
PDF Printer Definition File 
PDH Plesiochronous Digital Hierarchy 
PDI Power and Data Interface 
PDIF Product Definition Interchange Format 
PDISP Proposed Draft International Standardized Profile
PDL Page Description Language 
PDM Pulse Duration Modulation 
PDN Public Data Network 
PDO Portable Distributed Object
PDP Parallel Data Processor / Peripheral Data Processing / Program Data Processor / Page Directory Pointers
PDQ Pretty Damn(ed) Quick(ly) / Peachtree Data Query
PDR Probe Data Register
PDS Please Don't Shoot / Packet Driver Specification / Parallel Data Structure / Partition DataSet / Premise Distribution System / Planetary Data System / Physical Delivery Service / Planetary Data System / Premises Distribution System / Processor Direct Slot 
PDSP Peripheral Data Storage Processor 
PDTR Proposed Draft Technical Report 
PDU Packet Data Unit / Protocol Data Unit 
PE Public Enemy / Peripheral Equipment 
PEB PCM Expansion Bus 
PECC Product Engineering Control Center 
PEDI Protocol for Electronic Data Interchange 
PEG Public, Educational, and Governmental 
PEL Picture Element 
PEM Privacy Enhanced Mail / Product Error Message
PEN Public Electronic Network 
PENTIUM Produces Erroneous Numbers Through Incorrect Understanding of Mathematics
PEP Packet Exchange Protocol / Packetized Ensemble Protocol / Performance Enhancement Package / Personal Enrichment Program / Platform Environment Profile 
PEPM Partial Evaluation and semantics-based Program Manipulation
PEPY Presentation Element Parser, YACC 
PER Packed Encoding Rules 
PERL Practical Extraction and Reporting Language 
PET Positron Emission Tomography 
PETS Parameterized Executable Test Suite 
PF Parity Flag / Poll-Final (bit) / Program Function
PFA Page Frame Address / Peachtree First Accounting
PFEP Programmable Front - End Processor 
PFM Pure Freaking Magic / Pulse Frequency Modulation 
PFPU Processor Frame Power Unit 
PG Peripheral Gateway 
PGA Pin Grid Array (socket) / Professional Graphics Adapter
PGE Paging Global Extensions
PGI Parameter Group Identifier 
PGL Peer Group Leader (ATM Forum) 
PGP Pretty Good Privacy 
PH Packet Handler / Parity High (bit) 
PHA Phreakers/Hackers/Anarchists 
PHACT Phreakers/Hackers/Anarchists/Cyberpunks/Technologists
PHANTSY Phantasy Magazine
PHD Phreak/Hacker Destroyers (usually as PhD) 
PHIGS Programmer Hierarchical Interactive Graphics System 
PHUCK Phone Hackers United Crash Kill
PHUK Phreak/Hack, United Kingdom (sometimes as P-H-UK
PHUN Phreaker/Hackers Underground Network
PI Politically Incorrect / Private Investigator / Parameter Identifier / Peripherals Interface / Physical Inventory / Pirate Incorporated / Processing Instruction / Protocol Identifier 
PIA Pain in the as* / Peripheral Interface Adapter / Plug-In Administrator / 
PIC Politically incorrect / Personal Identification Code / Plastic Insulated Cable / Polyolefin Insulated Cables / Preferred InterExchange Carrier / Primary Inter-exchange Carrier / Primary Independent Carrier / Programmable Interrupt Controller
PICS Platform for Internet Content Selection / Plug-in Inventory Control System / Protocol Implementation Conformance Statement / Prgrammable Interrupt Controller
PID Proprietary Information Disclosure / Protocol IDentifier 
PIE Personal Interactive Electronics 
PIF Phase Interface Fading / Program Information File / Program Information File (usually as .PIF) / 
PIFT Protocol Interbank File Transfer 
PIG Product Information Guide
PIL Pirates In Legion
PIM Personal Information Manager / Personal Information Manager / Protocol Independent Multicast 
PIM Port Interface Module 
PIMP Personal Internet Mail Processor 
PIN Personal Identification Number 
PINE Program for Internet News and E-mail 
PING Packet InterNet Groper 
PINX Private Integrated Services Network Exchange 
PIO Programmed Input/Output / P Internet Protocol / Packet Interface Port 
PIPE Primary Integrated Platform Environment 
PIR Probe Instruction Register / Protocol Independent Routing
PIRCH Pathetic IRC CHat
PITA Pain In The Ass 
PITB Pain in the butt
PITR Product Inter-operation Test Report 
PITS Pie In The Sky 
PIU Path Information Unit 
PIXEL Picture Element 
PIXIT Protocol Implementation Extra Information for Testing 
PJL Printer Job Language 
PKC Public Key Cryptography
PKCS Public Key Crypto System 
PKE Public Key Encryption 
PKI Public - Key Infrastructure 
PL Parity Low (bit) / Physical Layer / Presentation Layer / Private Line 
PL/1 Programming Language / 1 
PL/M Programming Language for Microcomputers 
PLA Programmed Logic Array 
PLB Picture-Level Benchmark 
PLCC Plastic Leaded-Chip Carrier / Plastic Leadless Chip Carrier 
PLCP Physical Layer Convergence Procedure 
PLCP Physical Layer Convergence Protocol
PLD Phase Lock Demodulator / Programmable Logic Device 
PLDI Programming Language Design and Implementation 
PLE Public Local Exchange 
PLILP Programming Language, Implementations, Logics and Prog
PLL Phase Locked Loop 
PLOKTA Press Lots Of Keys To Abort 
PLOU Physical Layer Overhead Unit 
PLP Packet Layer Protocol/Procedure / Packet Level Procedure
PLS Please / Physical Layer Signaling / Programmable Logic Sequencer 
PLSAP Physical Layer Service Access Point 
PLU Primary Logical Unit 
PLV Production-Level Video 
PM Pardon Me / Performance Management / Peripheral Module / Phase Modulation / Physical Medium / Plant Management / Private Message / Protocol Machine 
PMA Performance Measurement Analysis / Physical Medium Attachment 
PMAC Packet Media Access Controller / Peripheral Module Access Controller
PMBI Pardon my butting in 
PMBX Private Manual Branch Exchange 
PMCR Probe Mode Control Register
PMD Physical Medium Dependent (Sublayer) / PostMaster Daemon (usually as pmd) 
PMETC Pardon Me, etc.
PMFBI Pardon Me For Butting In 
PMFJI Pardon Me For Jumping In 
PMG Product Marketing Group
PMI Physical Medium Independent (Sublayer) / Private Memory Interconnect 
PMIGBOM Put Mind In Gear Before Opening Mouth 
PMJI Pardon My Jumping In / Pardon me, Jumping in 
PMMU Paged Memory Management Unit 
PMN Performance Monitoring 
PMOS Pisitive-channel Metal Oxide Semiconductor
PMP Peed My Pants / PMP Point to MultiPoint 
PMR Poor Mans Routing
PMS Pantone Matching System / Paranoid Media Scrutinization / Peoples Message Service / Public Message Service 
PMT Packet-Mode Terminal / Planning Methodology Team
PMU Precision Measurement Unit 
PMX Packet Multiplexer / Private Message Exchange 
PMYMHMMFSWGAD Pardon Me, You Must Have Mistaken Me for Someone Who Gives A Damn
PN Personal Name / Positive Notification 
PNA Private Network Adapter 
PNB Pacific Northwest Bell 
PNC Personal Number Calling 
PND Present Next Digit 
PNG Portable Network Graphics 
PNIC Private Network Identification Code 
PNNI Private Network to Network Interface / Private Network-Node Interface 
PNO Public Network Operator 
PNP Plug aNd Play / Plug N Play (usually as PnP) 
PNPN Positive-Negative-Positive-Negative (devices) 
PO Purchase Order 
POA Power Open Association / Power of Attorney
POAC Probe Origin Authentication Check 
POAHF Put On A Happy Face
POB Peripheral Order Buffer 
POC Point of Contact
POCE Pantone Open Color Environment 
POD Piece Of Data
PODC Principles Of Distributed Computing 
POF Programmable Operator Facility 
POH Path OverHead / Power On Hours
POI Point Overhead Indicator 
POM Point of Manufacturing
PON Passive Optical Network 
PONSI Program On Non-collegiate Sponsored Instruction 
POOR Protectors Of Our Rights 
POP Point Of Presence / Post Office Protocol / Programmable Option Select 
POP3 Post Office Protocol version 3 
POPL Principles Of Programming Languages 
POPs Points of Prescence (points of local access to the net)
POQ Pis* Off Quickly
POQADCB Pis* Off Quickly and Don't Come back
POS Point Of Sale / Programmable Option Select
POSC Petrotechnical Open Software Corporation 
POSI Promoting OSI 
POSIX Portable Operating System Interface eXtension 
POSSLQ Person of Opposite Sex Sharing Living Quarters 
POST Power On - Self Test 
POT Point Of Termination 
POTS Plain Old Telephone Service 
POV Point of view
PP Parallel Port / Post Pay / Pre Pay 
PP&E Production, Planning, and Execution
PPA Privacy Protection Act / Professional Prepress Alliance 
PPARC Particle Physics and Astronomy Research Council 
PPC Program - to - Program Communication / Peer - to - Pee
PPCI Presentation Protocol Control Information 
PPD Peripheral Pulse Distributor / Post Script Printer Description / Post-Script Printer Description / Product Phase Down / Presentation Protocol Data Unit 
PPI Pixels Per Inch (usually as ppi) / Programmable Peripheral Interface
PPIC Phose-Phree-Inner-Circle 
PPL PeoPLe / Periodic Payment License
PPM Pages Per Minute (usually ppm) / Pages Per Month / Parts Per Million / Presentation Protocol Machine / Principal Period Maintenance / Pulse Position Modulation 
PPN Private Packet Network / Programmer Project Number; now known as ID# or UserId / Project Program Number / Public Packet Switching
PPOPP Principles and Practice Of Parallel Programming 
PPP Petty Pet Peeve / Point to Point Protocol
PPP/MP Point-to-Point Protocol/Multilink Protocol 
PPPMP Point-to-Point Protocol Multilink Protocol 
PPQN Pulses Per Quarter-Note (MIDI) 
PPS Packets Per Second / Product Performance Surveys / Public Packet Switching / Public Packet Switching Network / Pulses Per Second 
PPSDN Public Packet - Switched Data Network 
PPSN Public Packet - Switched Network 
PPSU Personal Printer Spooling Utility 
PPTM Protocol Profile Testing Methodology 
PPTP Point-to-Point Tunneling Protocol 
PQFP Plastic Quad Flat Pack (socket) 
PR Prepare / Path Replacement 
PRA Parabolic Reflector Antenna / Primary Rate Access 
PRAM Parallel Random Access Memory / Programmable Random Access Memory / Parameter Random Access Memory 
PRB Packet Receive Buffer 
PRCA Puerto Rico Communications Authority 
PRDMD Private Directory Management Domain 
PRE Prefix 
PREFUSE Presentation Refuse 
PREMIS PREMises Information System 
PREVIS Previsualization 
PRG Purge 
PRI (ISDN) Primary Rate Interface / Primary Rate Interface
PRID PRotocol IDentifier 
PRIMOS Prime Operating System
PRM Protocol Reference Model 
PRMD Private Mail Domain / Private Management Domain 
PRML Partial Response - Maximum Likelihood
PRN Printer 
PROFS PRofessional OFfice System
PROGRES PROgramming with Graph REwriting Systems 
PROLOG PROgramming in LOGic (programming language) 
PROM Programmable Read-Only Memory 
PROMATS PROgrammable MAgnetic Tape System 
PROMIS Prosecutors Management Information Systems
PROTEL PRocedure Oriented Type Enforcing Language 
PRS Personal Response System 
PRTC Puerto Rico Telephone Company 
PRTM Printing Response Time Monitor 
PRTSC Print Screen (usually as PrtSc) 
PRW Peachtree Report Writer
PS Personal System / Physical Sequence / Programmed Symbols / Physical Sequential / Post Scriptum / PostScript / Preferred Service / Presentation Service / Print Server / Program Store / Proposed Standard 
PS/2 Personal System/2
PSAP Presentation Service Access Point / Public Safety Answering Point (911)
PSC Peachtree Support Center / Prime Service Contractor / Print Server Control / Protection Switching Circuit / Public Safety Calling system / Public Service Commission 
PSD Power Spectral Density 
PSDC Public Switched Digital Capability 
PSDN Packet-Switched Data Network / Public Switched Data Network
PSDS Public Switched Digital Service 
PSDU Presentation Service Data Unit 
PSE Packet Switch Exchange / Page Size Extension / Power Series Expansion 
PSEC Picosecond (one trillionth of a second) 
PSEL Presentation Selector 
PSF Permanent Swap File 
PSG Peripheral and Supplies Group / Product Shipping Guide
PSH Push (flag) 
PSI Packet Switching Interface / Performance Summary Interval / Performance Systems International / Pounds per Square Inch / Process to Support Interoperability / Programmable Serial Interface 
PSIU Packet Switch Interface Unit 
PSK Phase-Shift Keying 
PSM (SQL) Persistent Stored Modules / Packet Service Module / Phase Shift Modulation / Position Switching Module 
PSN Packet Switched Network / Packet Switching Node / Public Switched Network
PSO Pending Service Order 
PSP Presentation Services Process 
PSPDN Packet Switched Public Data Network 
PSR Probe Status Register
PSRAM Pseudo-Static Random Access Memory
PSRG Privacy and Security Research Group 
PSS Packet Switch Stream / Packet Switched Services / Performance Support Systems / Professional Software Services 
PSS1 Private Signalling System 1 
PST Pre-Structured Technology (development process) 
PSTN Public Switched Telephone Network 
PSU Portable Storage Unit / Program Storage Unit / Power Supply Unit
PSW Program Status Word 
PT Pass Through / Payload Type / Please Token / Program Timer 
PTA Personal Telecommunications Assistant 
PTAN Performance Testing Alliance for Networks 
PTAT Private Trans Atlantic Telecommunications 
PTB Powers that be 
PTC Part Time Crackers / Public Telephone Companies 
PTE Packet Transport Equipment / Path Terminating Entity / Path Terminating Equipment 
PTG Physical Technology Group 
PTI Payload Type Identifier 
PTL Pirates That Live / Praise The Lord 
PTM Pulse Time Modulation 
PTMM Please Tell Me More
PTN Personal Telecommunications Number 
PTNX Private Telecommunications Network eXchange 
PTO Public Telecommunication network Operator / Public Telephone Operator 
PTP Peer-To-Peer / Point-To-Point 
PTR Pointer 
PTS Position and Trunk Scanner / Profile Test Specification 
PTSE PNNI Topology State Element (ATM Forum) 
PTSP PNNI Topology State Packet 
PTT Postal Telegraph and Telephone / Postal Telephone and Telegraph
PTTXAU Public TeleTex Access Unit 
PTW Primary Translation Word 
PTXAU Public Telex Access Unit 
PU Physical Unit 
PUC Peripheral Unit Controller / Public Utilities Commission / Public Utility Commission 
PUCP Physical Unit Control Point 
PUN Physical Unit Number
PUP PARC Universal Packet (protocol) 
PV Parameter Value 
PVC Permanent Virtual Channel / Permanent Virtual Circuit(s) / Permanent Virtual Connection / Permanent Virtual Connections / Polyvinyl Chloride 
PVCC Permanent Virtual Channel Connection 
PVI Protected mode Vrtual Interrupts
PVM Parallel Virtual Machine
PVN Private Virtual Network 
PVPC Permanent Virutal Path Connection 
PVT Permanent Virtual Terminal 
PWA Pirates With Attitude
PWD Present Working Directory (UNIX Command) 
PWI Public Windows Interface 
PWM Pulse Width Modulation 
PWS Peer Web Services
PWT Page Write - Through (pins) 
PXP Packet eXchange Protocol
Q Queue 
q=] Alternative smily with a backward hat on
QA Quality Assurance / Queue Arbitrated 
QAF Q Adapter Function 
QAM Quadrature Amplitude Modulation 
QAS Quasi-Associated Signaling
QBE Query By Example
QBIC Query By Image Content 
QBIT Qualified Bit 
QBM Query By Model 
QBOD Quality Board of Directors
QBP QuickBooks Pro
QC Quality Control 
QD Queuing Delay 
QDN Query Direct Number
QDSS Q-Bus Dragon Sub-System 
QEMM Quarterdeck Extended Memory Manager
QFA Quick File Access 
QFP Quad Flat Pack 
QIC Quarter Inch Cartridge / Quarter Inch Committee
QIO Queue Input / Output
QLLC Qualified Link Level Control / Qualified Logical Link 
QMP Quality Measurement Plan 
QMS Quality Micro Systems 
QND Quantum Network Design 
QOH Quantity On Hand 
QOS Quality Of Service (sometimes as QoS) 
QP Quattro Pro 
QPA Quality Program Analysis 
QPSK Quadrative/Quadrature Phase-Shift Keying
QPSX Queued Packet and Synchronous circuit eXchange 
QR Quick Response 
QRSS Quasi Random Signal Source 
QSIG Unified International corporate network signalling standard 
QSL Reply
QSO Conversation / QWK Support Option
QSS Quality Solution System / Quality Surveillance System 
QT Cutie / Qualification Test / Quick Time 
QTAM Queued Telecommunications Access Method 
QTML QuickTime Media Layer 
QTVR QuickTime Virtual Reality 
QTW Quick-Time for Windows
QVSS Q-Bus Viper Sub-System 
QWEST Quantum-Well Envelope State Transition
R Reminder / Ring 
R&R Rate & Route
R&SE Research & Systems Engineering
R-) Broken Glasses
R/O Read/Only
R/W Read Write
R/WM Read/Write Memory
RA Rate Adapter (0, 1, 2) / Read Audit / Recognition Arrangement / Registration Authority 
RAB RAID Advisory Board 
RABID Rebellion Against Big Irrepressible Dweebs 
RACE Research and development of Advanced Communication in Europe 
RAD Rapid Application Development / Remote Antenna Driver
RAD/RASP Remote Antenna Driver / Remote Antenna Signal Processor
RADAR RAdio Detection And Ranging 
RADD Rapid Application Development and Deployment 
RADF Reversing Automatic Document Feeder 
RADIUS Remote Authentication Dial-In User Service 
RADSL Rate Adaptive Digital Subscriber Line
RAEBNC Read and enjoyed, but no comment. 
RAF Record Address File 
RAG Registration and Advisory Group 
RAI Remote Alarm Signal 
RAID Redundant Array of Independent Disks / Redundant Array of Inexpensive Disk/Drives
RAM Random Access Memory / Remote Access Modem 
RAMAC RAID Architecture with Multilevel Adaptive Cache
RAMDAC Random Access Memory Digital To Analog Converter 
RAMP Reliability, Availability, Maintainability Program 
RAND Rural Area Network Design 
RAO Regional Accounting Office / Remote Automation Objects / Revenue Accounting Office 
RAR Return Address Register 
RARE Reseaux Associes pour la Recherche Europeenne (Europe - see TERNA) 
RARP Reverse Address Resolution Protocol 
RAS Remote Access Server / Remote Access Service / Row Address Strobe
RASC Residence Account Service Center 
RASP Remote Antenna Signal Processor
RBB Residential Broadband
RBDS Radio Broadcast Data System 
RBG Realtime Business Group 
RBHC Regional Bell Holding Company 
RBOC Regional Bell Operating Company(ies)
RBOR Request Basic Output Report 
RBS Robbed Bit Signaling 
RC MAC Recent Change Memory Administration Center / Read Committed (isolation level) / Reduced Cost / Regional Center / Remote Control / Resistance-Capacitance / Routing Control 
RCAC Remote Computer Access Communications service 
RCC Radio Common Carrier / Remote Cluster Controller / Reverse Command Channel
RCD Receiver-Carrier Detector 
RCF Remote Call Forwarding 
RCLDN Retrieval of Calling Line Directory Number 
RCM Remote Carrier Module 
RCSC Remote Spooling Communications Subsystem
RCU Radio Channel Unit 
RCV Receiver 
RCVR Receiver
RD (modem) Receive Data / Remove Directory (DOS) / Route Descriptor 
RDA Remote Data Access / Remote Database Access 
RDAU Remote Data Access Unit 
RDB Relational DataBase 
RDBA Remote DataBase Access 
RDBMS Relational DataBase Management System / Remote DataBase Management System 
RDC Remote Data Concentrator 
RDES Remote Data Entry System 
RDF Radio Direction Finding / Rate Decrease Factor 
RDI Remote Defect Identification / Remote Defect Indicator / Remote Defect Ind 
RDL Relational Database Language 
RDL-SQL Relational Database Language - Structured Query Language 
RDLSQL Relational Database Language Structured Query Language 
RDM Report Display Manager
RDN Relative Distinguished Name 
RDO Remote Data Objects 
RDP Reliable Datagram Protocol 
RDS Radio Digital System 
RDSN Region Digital Switched Network 
RDT Radio Digital Terminal / Recall Dial Tone / Referenced Data Transfer / Remote Digital Terminal / Restricted Data Transmissions 
RE Repeat / Returned / Recall (a supplementary service) / Reference Equivalent / Regarding 
REBI Reliability of Electronic Business Information 
REC RARE Executive Committee / Record (as in tape Record-ing) / Regional Engineering Center 
RECS Reseller Electronic Communication System
REHI Hello Again (returned/repeat - Hi!)
REJ Reject 
REM Remark / Remote Equipment Module / Ring Error Monitor 
REMF Reverse ElectroMagnetic Force 
REMOB REMote OBservation
REMOBS REMote OBservation System 
REN Rename (DOS) / Ring Equivalence Number / Ringer Equivalence Number 
REP Repeater Expansion Port / Repertory Dialing
RES Reserved 
RESCU Remote Emergency Satellite ResCue Unit 
RET Resolution Enhancement Technology (usually as REt) 
RETLA Really Extended Three Letter Acronym 
REV Revenue / Revision
REXEC REmote eXECutable/Execution 
REXX REstructured eXtended eXecuter (language) 
RF Radio Frequency / Resume Flag 
RF/DC Radio Frequency / Data Communication 
RF/ID Radio Frequency Identification 
RFA Remote File Access 
RFC [Internet] Request For Comment / Radio Frequency Choke 
RFD Regional Frequency Divider / Request For Discussion
RFDC Radio Frequency Data Communication 
RFI Radio Frequency Interface/Interference / Request for Information
RFID Radio Frequency Identification 
RFNM Request For Next Message
RFP Request For Proposal 
RFQ Request For Quotation 
RFS Remote File Server/Service / Remote File System 
RFT Request For Technology / Revisable Form Text / Revisable Format Text 
RFTDCA Revisable Form Text Document Content Architecture
RG Radio Government 
RGB Red-Green-Blue 
RH Relative Humidity / Request Header / Response Header 
RHOB Relevant Hierarchical Operational Binding 
RI Reference Implementation / Rename Inhibit / Ring In (MAU Connector) / Ring Indication / Ring Indicator (signal) / Routing Indicator / Routing Information 
RIB Routing Information Base 
RID Remote Isolation Device 
RII Routing Information Indicator 
RIN Relative Intensity Noise 
RIOT Revolution In Our Time
RIP Rest in Peace / Raster Image Processor / Remote Imaging Protocol / Revolutionizing International Piracy / Router Information Protocol / Routing Information Protocol 
RIPE Reseaux IP Europeenne 
RIS Remote Installation Service 
RISC Reduced Into Silly Code / Reduced Instruction Set Computer(ing) / Reduced Instruction Set Code
RISD Reference Information Systems Development 
RISE Retrieval and Interchange of Standards in Europe 
RISLU Remote Integrated Services Line Unit 
RJ Registered Jack (as in RJ-11 and RJ-45) 
RJE Remote Job Entry 
RL Real life
RLCM Remote Line Concentrating Module 
RLE Run Lenth Encoded (graphic format) 
RLL Run Length Limited 
RLM Remote Line Module 
RLOGIN Remote Login 
RLSD Received Line Signal Detector 
RLT Remote Line Test 
RM Reference Manual/Model / Resource Management
RMA Return Merchandise Authorization 
RMAS Remote Memory Administration System 
RMATS Remote Maintenance And Testing System 
RMB Right Mouse Button
RMDIR Remove Directory (DOS) 
RMDM Reference Model of Data Management 
RMF Remote Management Facility 
RMI (Java) Remote Method Invocation 
RMON Remote Monitor standard / Remote network MONitoring 
RMONMIB Remote network MONitoring Management Information Base 
RMP Remote Maintenance Protocol 
RMR Remote Message Register(s) 
RMS Root Mean Squared / Record Management Services
RMTP Reliable Multicast Tranport Protocol
RN Receipt Notification / Reference Noise
RNA Ring, No Answer (communication or telephone term for a problem) 
RNE Reseau National d'Essal (National Network for Testing) 
RNG Random Number Generator 
RNOC Regional Network Operations Center 
RNR Receiver Not Ready 
RO Read Only / Receive Only / Remote Operations / Ring Out (MAU connector) 
RO(T)FL rolling on the floor laughing
ROA Return On Assets 
ROAC Report Origin Authentication Check 
ROADS Resources Organisation And Discovery in Subject based Services 
ROB Remote Order Buffer 
ROC Regional Operating Company 
ROCIE Riverside/Orange County/Inland Empire (Net) 
ROER Remote Operations ERror 
ROFFNAR Rolling on the Floor for no Apparent Reason
ROFL Rolling On (the)Floor Laughing [appropriate response for good jokes] {ROTFL for illiterate people}
ROFLAPMP Rolling On (the)Floor Laughing And Peeing My Pants
ROFLASTC Rolling On (the) Floor Laughing And Scaring The Cat
ROFLGO Rolling On (the) Floor Laughing Guts Out 
ROFLMAO Rolling On (the) Floor Laughing My A** Off
ROFLOL Rolling on the Floor Laughing Out Loud
ROFLOLBAG Rolling on the Floor Laughing Out Loud Busting a Gut
ROFLUTS Rolling On (the)Floor Laughing Unable to Speak
ROFLWMP Rolling on the Floor Wetting My Pants
ROFPML Rolling on the Floor Peeing Myself Laughing
ROH Receiver Off-Hook 
ROI Return On Investment
ROIV Remote Operations InVoke 
ROLAP Relational On-Line Analytical Processing 
ROLC Routing Over Large Clouds 
ROM Read Only Memory 
ROP Raster OPerations 
ROPM Remote Operations Protocol Machine 
RORE Remote Operations Return Error 
RORJ Remote Operations ReJect 
RORS Remote Operations ReSponse 
ROS Read-Only Store 
ROSE Remote Operations Service Element 
ROT Reign of Terror
ROTBA Reality on the Blink Again
ROTF Rolling On The Floor 
ROTF,L - Rolling On The Floor, Laughing 
ROTFL roll(ing) on the floor laughing (also, ROF,L; ROFL) 
ROTFLABIC Rolling On The Floor Laughing and biting into carpet 
ROTFLAHMS Rolling On The Floor Laughing And Holding My Side 
ROTFLBTC ROTFL biting the carpet 
ROTFLBTCUTS ROTFLBTC .. unable to stop 
ROTFLGO ROTFL... guts out 
ROTFLLTC ROTFL... licking the glue 
ROTFLMAO Rolling On the Floor, Laughing My A** Off
ROTFLSTC ROTFL... scaring the cat 
ROTL Remote Office Test Lines
RPC Registered Protective Circuitry / Remote Procedure Call 
RPDFT Robustly Path Delay Fault Testable 
RPE Remote Peripheral Equipment 
RPG Remote Password Generator / Report Program Generator (programming language) / Role Playing Game(s) 
RPI Rockwell Protocol Interface 
RPL Remote Procedure Load / Remote Program Load 
RPM Reduced Parts Menu / Relentless Pursuit of Magnificence / Remote Process Management / Revolution Per Minute (usually rpm) / Rotations Per Minute
RPN Reverse Polish Notation 
RPOA Recognized Private Operating Agency 
RPQ Request for Price Quotation 
RPS Redundant Power Supply 
RPV Remotely Piloted Vehicle
RQS Rate/Quote System
RQSM Regional Quality Service Management 
RQT Reliability Quality Test 
RR Ready to Receive / Receiver Ready / Repeatable Read (isolation level) / Reply requested
RRO Reports Receiving Office 
RRT Reverse Recovery Time 
RS Recommended Standard / Record Separator (ASCII) / Remote Single-layer / Resume Session / Ring Station 
RSA Reference System Architecture / Repair Service Attendant / Rivest, Shamir and Adleman (Encryption algorithm) 
RSA-PPDU ReSynchronize Acknowledge Presentation Protocol Data Unit 
RSAPPDU ReSynchronize Acknowledge Presentation Protocol Data Unit 
RSAT Reliability and System Architecture Testing 
RSB Repair Service Bureau 
RSC Remote Switching Center / Residence Service Center
RSCS Remote Source Control System / Remote Spooling and Control/Communications Subsystem
RSE Remote Single-layer Embedded / Removable Storage Elements
RSEXEC Resource Sharing EXECutive
RSFG Route Server Functional Group (ATM Forum) 
RSH Remote SHell / Restricted SHell
RSI Repetitive Strain Injury 
RSL Received Signal Level / Remote Ship List
RSLE Remote Subscriber Line Equipment 
RSLM Remote Subscriber Line Module 
RSN Real Soon Now (usually sarcastically) / Remote Switching Module
RSO Regional Standards Organization 
RSPPDU ReSynchronize Presentation Protocol Data Unit 
RS-PPDU ReSynchronize Presentation Protocol Data Unit 
RSPX Remote Sequenced Packet eXchange 
RSRB Remote Source Route Bridging 
RSS Reception Support Statement / Remote Switching System
RSTE/E Resource System Time Sharing - Enhanced/Extended/Environment 
RSU Remote Switching Unit 
RSVP Rdb Solutions Vendor Program / Resourse reSerVation Protocol / Revolutionary Surrealist Vandal Party
RT Real-Time / Reliable Transfer / Roundtable / Routing Table / Routing Type 
RT/DSS Real-Time/Decision Support Service
RTA Real-Time Accelerator / Remote Trunk Arrangement
RTAB Reliable Transfer ABort 
RTAS Real-time Technology and Application Symposium 
RTBG RealTime Business Group 
RTC Real-Time Clock / RARE Technical Committee 
RTCP Real time Transport Control Protocol
RTD Resistance Temperature Detector 
RTDox read the documentations
RTE Remote Terminal Emulation 
RTEL Reverse TELnet 
RTF Rich Text Format 
RTFFAQ Read The F**king FAQ
RTFI Read the Friendly Instructions
RTFM Read the "fine" manual / read the f#$%ing manual / Read the (Flipping) Manual. / Realtime Traffic Flow Measurement 
RTI Remote Terminal Identification 
RTK Right - To - Know 
RTKNET Right - To - Know NETwork 
RTM Read the manual / Resistor-Transistor Logic / Run Time Library / Regional Telecommunications Management / Remote Test Module
RTMP Routing Table Maintenance Protocol 
RTN Routing Transit Number 
RTNR Ringing Tone No Reply 
RTOAC Reliable Transfer Open Accept 
RTORJ Reliable Transfer Open Reject 
RTORQ Reliable Transfer Open Request 
RTOS Real Time Operating System
RTP Real-time Transport Protocol
RTPM Reliable Transfer Protocol Machine 
RTS Real-Time System / Reliable Transfer Service / Remote Testing System / Request To Send / Residual Time Stamp 
RTSE Reliable Transfer Service Element 
RTSP Real Time Streaming Protocol 
RTT Round - Trip Time 
RTTI Run-Time Type Identification 
RTTY Radio Teletype
RTU Remote Trunking Unit 
RTV Real-Time Video 
RU Read Uncommitted (isolation level) / Request Unit / Response Unit 
RUA Remote User Agent 
RUCUS Rhodes University Computer Users Society 
RUIP Remote User Information Program 
RUM Remote User Multiplex 
RUOK Are You OK?
RVD (MIT) Remote Virtual Disk
RVI Reverse Interrupt 
RW Read - Write 
RWC Remote Work Center 
RWCC Regional Workshop Coordinating Committee 
RWSCC Regional WorkShop Coordinating Committee 
RX Receive (Transmission or Data) / Remote Exchange
RZ Return to Zero 
RZI Return to Zero, Inverted
S&NIJUG Scottish and Northern Ireland Janet User Group 
S Shareable / Sleeve
S/MIME Secure Multimedia Internet Mail Extensions 
S/WAN Secure Wide Area Network 
S2MP Scalable Shared memory MultiProcessor 
SA Assistant Scoutmaster / Selective Availability / Source Address / Storage Array / Study Administration 
SAA Service Aspects and Applications / Systems Application Architecture 
SAAL Signalling ATM Adaptation Layer 
SABB Storage Array Building Block 
SABM Set Asynchronous Balanced Mode 
SABME Set Asynchronous Balanced Mode Extended 
SABRE Semi-Automatic Business Research Environment 
SAC Service Area Code / Special Area Code / Service Area Computer / Simplified Access Control / Single Attachment Concentrator / 
SACF Single Association Control Function 
SACK Selective ACKnowledgment 
SAF Subnetwork Access Facility 
SAFE Security And Freedom through Encryption / Security Awareness From Education
SAFENET Survivable Adaptable Fiberoptic Embedded Network 
SAFTE SCSI Accessed Fault-Tolerant Enclosure 
SAF-TE SCSI Accessed Fault-Tolerant Enclosure 
SAG SQL Access Group / Street Address Guide 
SAGE Semi-Automatic Ground Environment 
SAI Serving Area Interface 
SAIL Stanford Artificial Intelligence Lab 
SAK Selective AcKnowledgment 
SALI Standalone Automatic Location Identification/Information
SALSER Scottish Academic Libraries Serials Project 
SAM Secure Access Multiport 
SAMA Step-by-step Automatic Message Accounting 
SAMNET (UK) Sub-Auroral Magnetometer Network 
SAN System Area Network / Storage Area Network
SAO Single Association Object 
SAP Secondary or Separate Audio Program / Service Access Point / Service Advertising Protocol 
SAPI Service Access Point Identifier / Speech Application Programming Interface 
SAR Some Assembly Required / Segmentation And Reassembly / Store Address Register
SARC Symantec Antivirus Research Center
SARF Security Alarm Reporting Function 
SARM Set Asynchronous Response Mode 
SARTS Switched Access Remote Test System 
SAS Single Attachment Station/System / Special Access Surcharge / Statistically Assigned Sockets / SWITCH Access System / Switched Access Services 
SASE Self Addressed Stamped Envelope / Special Application Service Element / System And Support Engineering 
SASFE SEF/AIS Alarm Signal, Far End 
SASI Shugart Associates System Interface
SASO Saudi Arabian Standards Organization 
SAT Special Access Termination / Supervisory Audio Tone
SATAN Security Administrator Tool for Analyzing Networks 
SATF Security Audit Trail Function 
SATNET SATellite NETwork
SATS Selected Abstract Test Suite 
SAW Surface Acoustic Wave 
SBA Shipping and Billing Authorization
SBB System Building Block 
SBC Single Board Computer 
SBCN Sitting Behind the Computer, Naked
SBCS Single - Byte Character Set 
SBD silent but deadly (fart) [Beavis & Butthead] cos because
SBDN Southern Bell Data Network 
SBI Storage Bus Interconnect 
SBIR Small Business Innovation Research (program) 
SBIT Startup Built In Test 
SBL Softbridge BASIC Language 
SBMS Southwestern Bell Mobile Service 
S-BOX Skunk Box 
SBP Serial Bus Protocol (sometimes as SBP-2) 
SBR Storage Business Review
SBS Satellite Business Systems / Skyline Business Systems 
SBT Software Business Technologies 
SC Scanner Controller / Sectional Center / SubCommittee / Subscriber Connector 
SCA Short Code Address / Strategic Capital Acquisitions / Subsidiary Communication Authorization / Swiss Cracking Association 
SCAI Switch to Computer Application Interface 
SCAM SCSI Configured Auto-Magically
SCAT Special Computerized Attack Team / Stromberg-Carlson Assistance Team
SCC Satellite Communications Control / Specialized Common Carrier(s) / Standards Council of Canada / Switching Control Center 
SCCP Signaling Connection Control Part 
SCCS Specialized Common Carrier Service / Switching Control Center System
SCD Software Chronical Digest 
SCE Service Creation Environment
SCF Sectional Center Facility / Selective Call Forwarding 
SCFM Sub-Carrier Frequency Modulation 
SCI Scalable Coherent Interface / Strategic Computing Initiative
SCIT Semi-Conductor and Interconnect Technologies 
SCL Switch to Computer Link 
SCLM Software Configuration and Library Manager
SCM Software Configuration Management / Station Class Mark / Subscriber Carrier Module 
SCMP System Cooperative Marketing Program
SCNR Sorry CouldN't Resist 
SCNR Sorry, CouldN't Resist 
SCO SemiConductor Operations / Serving Central Office 
SCONUL Standing Council of National and University Libraries 
SCOP Standing Conference of Principals of Colleges 
SCOT Stepper Central Office Tester 
SCOTS Surveillance and Control Of Transmission System 
SCP Service/Signal/System Control Point / Signal Conversion Point / System Control Program 
SCPAM Simple Coded - Pulse Amplitude Modulation 
SC-PAM Simple Coded - Pulse Amplitude Modulation 
SCPC Single-Channel Per Carrier / Single-Channel Per Connection
SCPD Supplementary Central Pulse Distributor 
SCR Selective Call Rejection / Silicon Control Rectifiers / Sustainable Cell Rate / Sustained Cell Rate / Satellite Communications Systems 
SCS Silicon Controlled Switches / SNA Character String / SWITCH Central System / System Communication Services / System Conformance Statement 
SCSA Signal Computing System Architecture 
SCSI System Can't See It / Small Computer Standard/System/Storage Interface
SCT Screen Capture Text 
SCTO Soft Carrier Turn-Off 
SCTR System Conformance Test Report 
SCU Selector Control Unit 
SCUSA Standards Council of the United States of America
SCX Specialized Communications eXchange 
SD (modem) Send Data / Start Delimiter 
SD&D Specific Development & Design
SDA Security Domain Authority / Silicon Dream Artists / Software Design Automation 
SDAP Standard Document Application Profile 
SDC Software Distribution Center 
SDE Submission and Delivery Entity 
SDF Screen Definition Facility / Standard Data Format 
SDH Synchronous Digital Hierarchy 
SDI Standard Disk Interconnect / Standard Drive Interface / Strategic Defense Initiative / Supplier Declaration of Inter-operation 
SDIF SGML Document Interchange Format 
SDIS Switched Digital Integrated Service 
SDK Software Development Kit / Software Developer's Kit 
SDL Shielded Data Link / Specification and Description Language 
SDL/GR Specification and Description Language Graphical Representation 
SDL/PR Specification and Description Language Phrase Representation 
SDLC Synchronous Data Link Control 
SDLGR Specification and Description Language Graphical Representation 
SDLP Standard Device Level Protocol 
SDLPR Specification and Description Language Phrase Representation 
SDM Space Division Multiplexing / Shareware Distribution Network / Software Defined Network 
SDNS Secure Data Network System 
SDSN Secure Data System Network
SDO Standards Development Organization 
SDOC Selective Dynamic Overload Controls 
SDP Service Delivery Point / Store Delivery Point
SDR Store Data Register 
SDRAM Synchronous Dynamic Random Access Memory 
SDRP Source Demand Routing Protocol 
SDS Sales and Distribution Systems / Switched Data Service / Synchronous Data Set 
SDSAF Switched Digital Services Applications Forum 
SDSC San Diego Supercomputer Center / Synchronous Data Set Controller 
SDSE Shadowed Directory Service area specific Entry 
SDSF System (Spool) Display and Search Facility
SDSI Simple Distributed Security Infrastructure 
SDSL Single-line Digital Subscriber Line / Symmetric Digital Subscriber Loop 
SDTV Standard-Definition Television 
SDU Service Data Unit 
SDX Storage Data Acceleration(Xceleration)
SE Session Entity / Society Elite / Sweden / Switching Element 
SEA Self Extracting Archive (usually as .SEA) / Society for Electronic Access / System Enhancement Associates 
SEAL Screening External Access Link / Secure Electronic Authorization Laboratory / Secure Electronic Authorization Laboratory / Simple and Efficent Adaption Layer
SEAS Signaling Engineering and Administration System 
SEC Second (usually as sec) / Single Edge Contact
SECAM SEquential And Memory / Sequential Couleur Avec Memoire / Systeme En Couleur Avec Memoire 
SECB Severely Errored Cell Block 
SEDA Staff and Education Development Association 
SEE Systems Equipment Engineering 
SEF Severely Errored Framing / 
SEF/AIS Severely Errored Framing Alarm Indication Signal 
SEG Semiconductor Engineering Organization
SEH Structured Exception Handling 
SEI Software Engineering Institute 
SEIS Software Engineering & Information Systems (research group) 
SEK Swedish Electrical Commission 
SEL Selector 
SELV Safety Extra-Low Voltage (circuit) 
SEM System Error Message
SEP Someone Else's Problem
SEPP Secure Electronic Payment Protocol (specification) 
SEQUEL Structured English QUEry Language 
SERC Science and Engineering Research Council 
SES Service Evaluation System 
SESFE Severely Errored Second Far End 
SESP Severely Errored Second Path 
SET Secure Electronic Transaction(s) (specification) 
SETE Smiling Ear To Ear
SETS Selected Executable Test Suite 
SF Science Fiction / Sign Flag / Single Frequency / Summarization Function / Supervision-control Frequency / Switching Fabric 
SFA Sales Force Automation 
SFAIAA So Far As I Am Aware 
SFD Simple Formattable Document 
SFE Secure Front End
SFI Single Frequency Interface / Society for the Freedom of Information 
SFLA Stupid Four Letter Acronym 
SFMC Satellite Facility Management Center 
SFQL Structured Full-text Query Language 
SFS Suomen Standardisoimisliitto (Standards Association of Finland) 
SFT System Fault Tolerance 
SFU Store and Forward Unit 
SG Signal Ground / Study Group / Supergroup
SGA Sysops Guild Association 
SGAUA Scitex Graphic Arts Users Association 
SGFS Special Group on Functional Standardization 
SGI Silicon Graphics, Inc. 
SGISP Special Group on International Standardized Profiles 
SGML Standard Generalized Markup Language / Standard Generic Markup Languange 
SGML-B Standard Generalized Markup Language - Binary 
SGMLB Standard Generalized Markup Language Binary 
SGMP Simple Gateway Management Protocol / Simple Gateway Monitoring Protocol 
SGND Signal Ground 
SGRAM Synchronous Graphics Random Access Memory
SH Shared 
SHA Secure Hash Algorithm / Swedish Hackers Association 
SHDSL Single-Line - High-bit-rate Digital Subscriber Line
S-HDSL Single-Line - High-bit-rate Digital Subscriber Line
SHEFC Scottish Higher Education Funding Council 
SHERIFF Statistical Heuristic Engine to Reliably and Intelligently Fight Fraud 
SHF Super High Frequency 
SHIBNI SHIpped But Not Invoiced 
SHID Slaps Head In Disgust
SHIT See here - you're gonna get kicked :)
SHM Shi* Happens, Mate
SHS Secret Hackers Society 
SHT Short Holding Time 
SHTML Super HyperText Markup Language
S-HTTP Secure HyperText Transfer Protocol 
SHV Standard High Volume 
SI Shift In (ASCII) / Source Index / SPDU Identifier / Status Indicator / Step Index 
SIA Semiconductor Industry Association / Stable Implementation Agreements 
SIC Serial Interface Card / Silicon Integrated Circuit / Standard Industrial Classification 
SICS Sitting in Chair Snickering / Service Implementation Conformance Statement
SID Satanic Incarnate of Doom / Security IDentifier / Signaling Identifier / Source Identifier / Sudden Ionospheric Disturbance / Switch Interface Device / System IDentification 
SIDF System Independent Data Format 
SIDH System Identification Home
SIF Standard Input Format
SIG Special Interest Group 
SIGCAT Special Interest Group on CD-Rom Applications and Technology 
SIGWEB Special Interest Group on the World Wide Web 
SIIN Shi* if I Know
SIL Semiconductor Injection Laser 
SILS Standard for Interoperable LAN Security 
SIM Service Industry Marketing / Subscriber Identity Module
SIMA Strategic (Support?) Initiative for Multimedia Application 
SIMCA sitting in my chair amused 
SIMD Single Instruction Multiple Data 
SIMM Single Inline Memory Module, a common form of memory. Most amiga cards use 72 pin SIMMs. Most PC SIMMs are not amiga compatible.
SIMP Satellite Information Message Protocol 
SINA Static Integrated Network Access 
SIO Security Information Object 
SIP Single In-line Package / SMDS Interface Protocol 
SIPL State In Programming Languages 
SIPP Single In-line Pin Package / Single Internet Protocol Plus 
SIPRNET Secret IP Router Network (usually as SIPRnet) 
SIR Speaker Independent Recognition 
SIRDS Single Image Random Dot Stereograms 
SIS Structured Information Store / Standardisering-skommissionen In Sverige (Swedish Standards Committee) 
SIT Special Information Tones 
SITA Society for International Telecommunications for Aeronautics 
SITD Still in the dark 
SIVR Speaker Independent Voice Recognition 
SJG Steve Jackson Games 
SJWG Security Joint Working Group 
SK Sofdox Krackers
SKIP Simple Key management for Internet Protocols
SKISM Smart Kids Into Sick Methods 
SKU Stock Keeping Unit 
SL Section Leader / Session Layer 
SLA Service Level Agreement 
SLAC Stanford Linear Accelerator Laboratory
sLag So Lovely a Guy
SLAP Sounds Like A Plan
SLC Semiconductor Laser Configurations / Service Level Contract / Software License Configurator / Subscriber Line Charges / Subscriber Loop Carrier 
SLD Second Level Domain 
SLE Screen List Editing / Screening Line Editor 
SLED Single Large Expensive Disk 
SLF Smurf Liberation Front
SLI Southern Lights Incorporated (usually as SLi) 
SLIC Subscriber Line Interface Card / Subscriber Line Interface Circuit 
SLIM Subscriber Line Interface Module 
SLIP Serial Line Interface Protocol / Serial Line Internet Protocol 
SLMR Silly Little Mail Reader
SLR Service Level Reporter / Single Lens Reflex (camera) 
SLS Sequential Logic Systems / Storage Library System
SLT System Load Tape 
SLU Secondary Logical Unit / Serial Line Unit
SM Snail Mail / Standby Monitor / Switching Module
SMA Sub-Miniature Assembly 
SMAE Systems Management Application Entity 
SMAP Systems Management Application Process 
SMAPI Simple Messaging Application Programming Interface 
SMART Source Migration And Reporting Tool 
SMAS Supplementary MAin Store / Switched Maintenance Access System
SMASE Systems Management Application Service Element 
SMASF Switched Maintenance Access System Frame
SMASPU Switched Maintenance Access System Power Unit
SMB Server Message Block (protocol) 
SMC Secretariat Management Committee / Sleep Mode Connection / Standard Microsystems Corporation 
SMCC Sun Microsystems Computer Company
SMD Storage Module Device 
SMDF Subscriber Main Distributing Frame 
SMDI Simplified Message Desk Interface / Storage Module Disk Interconnect / Subscriber Message Desk Interface
SMDL Standard Music Description Language 
SMDR Station Message Detailed(ing) Recording 
SMDS Switched Multimegabit Data Service / Switched Multi-Megabit Data Service / Switched Multi-Megabit Data Services
SME Society of Manufacturing Engineers 
SMF Single Mode Fiber 
SMFA Systems Management Functional Area 
SMG Super Master Group
SMI Structure of Management Information / System Management Interrupt
SMIB System Management Information Base 
SMIME Secure Multimedia Internet Mail Extension / Secure Multipurpose Internet Mail Extensions
SMIS Specific Management Information Service 
SMISE Specific Management Information Service Element 
SMK Shared Management Knowledge 
SMM System Management Mode
SMO Serious Mode On / System Management Overview 
SMOff Serious Mode Off 
SMOP Simply a Matter Of Programming / Small Matter Of Programming
SMP Service Message Blocks / Symetric MultiProcessing / Session Management Protocol / Standby Monitor Present / Symmetrical Multiprocessing 
SMPDU Service Message Protocol Data Unit / System Management Protocol Data Unit 
SMPTE Society of Motion Picture and Television Engineers
SMRAM System Management Random Access Memory
SMRP (AppleTalk) Simple Multicast Routing Protocol 
SMRT Signal Message Rate Timing 
SMS Self-Maintenance Services / Service Management System / Service Management Systems / Short Message Service / Station Management System / Storage Management Services / Storage Management Subsystem / Systems Management Server 
SMSA Standard Metropolitan Statistical Area 
SMSP Storage Management Services Protocol / Simple Mail Transfer Protocol / Simple Mail Transport Protocol 
SMU Strategic Marketing Unit
SN Sequence Number 
SNA Systems Network Architecture 
SNACP SubNetwork Access Protocol (usually as SNAcP) 
SNADS Systems Network Architecture Distribution Services
SNAFU - Situation Normal, All "fixed" Up or Fouled UP or Fu**ed Up
SNAP Sub-Network Access Protocol
SNARE SubNetwork Address Resolution Entity 
SNCP Single Node Control Point 
SNDCF SubNetwork Dependent Convergence Facility / SubNetwork Dependent Convergen 
SNDCP SubNetwork Dependent Convergence Protocol 
SNERT Snot-Nosed Egotistical Rude Teenager
SNET Southern New England Telephone 
SNG Secured Network Gateway 
SNI Siemens Nixdorf Informationsysteme / Subscriber Network Interface 
SNICF SubNetwork Independent Convergence Facility 
SNICP SubNetwork Independent Convergence Protocol 
SNMP Simple Network Management Protocol 
SNP Sequence Number Protection 
SNPA SubNetwork Point of Attachment 
SNPC Software New Products Committee
SNR Signal to Noise Radio
SNRM Set Normal Response Mode 
SNS Satellite Navigation System 
SO Shift Out (ASCII) / Significant Other aka Spouse, boyfriend/girlfriend) / System Option 
SOA Safe Operating Area 
SOAC Service Order Analysis Control 
SOB Do you really need *me* to explain this one? Well, Son of a Female Dog
SOC Service Oversight Center / Systems and Option Catalog
SOCC Standard Optical Cable Code 
SOCCA Specification Of Coordinated and Cooperative Activities 
SODIMM Small Outline Dual Inline Memory Module 
SO-DIMM Small Outline Dual Inline Memory Module 
SOE Silly/Stupid Operator Error / Standard Operating Environment / Standards of Excellence
SOF Save our Freeware
SOGITS Senior Officials' Group for Information Technology Standardization 
SOGT Senior Officials' Group for Telecommunications 
SOH Section OverHead / Service Order History / Start Of Header / Start Of Heading (ASCII) 
SOHO Small Office, Home Office 
SO-J Small Outline J-lead
SOL Sh*t Outta Luck / Sons Of Liberty.
SOM Start Of Message 
SONAR Service Order Negotiation And Retrieval 
SONDS Small Office Network Data System 
SONET Snychronous Optical NETwork
SOP Standard Operating Procedure / Sum Of the Pieces / Same old stuff 
SOS Save our Shareware
SOSIG Social Science Information Gateway 
SOST Special Operator Service Treatment
SOT Short Of Time / (SoT) The Sea of Tranquility
SOTMG Short Of Time Must Go
SP Security Protocol / Service Provider / Sharp Private / Signal Processor / Signaling Point / Stack Pointer
SPA Software Publishers Association 
SPAG Standards Promotion and Application Group 
SPAM SPiced hAM. Hormel's canned meat. 
SPAN Space Physics Analysis Network 
SPARC Scalable Performance Architecture 
SPC Southern Pacific Communications / Stored Program Control
SPCS Stored Program Control Systems
SPCSS Stored Program Control Switching System 
SPD Software Product Description 
SPDA Supplier Data Program
SPDL Standard Page Description Language 
SPDU Session Protocol Data Unit 
SPE Synchronous Payload Envelope 
SPEC Standard Performance Evaluation Corporation 
SPF Shortest Path First 
SPG Software Product Group 
SPH Sets Per Hour 
SPI Safeguarding Proprietary Information / Self-Paced Instruction / Serial Peripheral Interface / Subsequent Protocol Identifier 
SPID Service Profile Identification / Service Protocol Identifier 
SPKI Simple Public Key Infrastructure 
SPLaT Society for the Preservation of Lasting Anarchy and Terrorism
SPM Session Protocol Machine / Sheets Per Minute / Software Performance Monitor 
SPMF Servo Play Mode Function 
SPN Signal Processor Network 
SPOOL Simultaneous Peripheral Operation OnLine 
SPP Sequenced Packet Protocol / Ship Plan / Standard Parallel Port
SPS Self Preservation Society / Software Product Services / Standby Power Supply
SPTS Single Program Transport Stream 
SPUC Serial Peripheral Unit Controller 
SPUC/DL Serial Peripheral Unit Controller / Data Link 
SPX Sequenced Packet eXchange 
SQD Signal Quality Detector 
SQE Signal Quality Error 
SQL Structural Query Language
SQL/DS Structured Query Language / Data System 
SQL-DMO Structured Query Language - Distributed Management Objects 
SQM Software Quality Management 
SQUID Super-conducting Quantum Interference Device 
SR Source Routing 
SRA Selective Routing Arrangement 
SRAM Static Random Access Memory 
SRB Source Route Bridging 
SRC Source (code) / System Resource Center
SRE Scully Rational Explanation / Standards for Robot Exclusion
SREJ Selective Reject 
SRF Specifically Routed Frame 
SRG Shareware Reference Guide / Strategic Relations Group
SRI Stanford Research Institute 
SRL Singing Return Loss 
SRT Source Routing Transparent 
SRTC Service Right-to-Copy
SRTS Synchronous Residual Time Stamp 
SRUAPDU Status Report User Agent Protocol Data Unit 
SR-UAPDU Status Report User Agent Protocol Data Unit 
SS (U.S.) Secret Service / Server-to-Server / Session Service / Signaling System / Socket Services / Special Services / Stack Segment / Standard System 
SS/DD Single - Sided, Double Density 
SS6 Signaling System 6
SS7 Signaling System 7
SSA Serial Storage Architecture 
SSAN Social Security Account Number
SSAP Session Service Access Point / Source Service Access Point 
SSAS Station Signaling and Announcement System/Subsystem
SSB Single Side Band / Software Supply Business
SSBAM Single-Side Band Amplitude Modulation
SSBSC Single SideBand Suppressed Carrier 
SSC Special Services Carrier/Center 
SSCF Service Specific Coordination Function 
SSCOP Service Sepecified COnvergence Protocol / Service Specific Connection Oriented Protocol 
SSCP System/Subsystem Services Control Point / Service Specific Convergence Sublayer 
SSD Solid State Disk 
SSDD Same stuff different day 
SSDU Session Service Data Unit 
SSEL Session Selector 
SSFD Solid State Floppy Disk
SSG Software Systems Group / Strategic Studies Group / Suburban Survival Guide 
SSI Small Scale Integration 
SSL Secure Sockets Layer (security protocol) / Standard Security Label
SSM Single Segment Message 
SSN Social Security Number 
SSN Switched Service Network 
SSO Satellite Switching Office 
SSODB Secret Society Of Dark Birds 
SSP Service Switching Point / Switching Service Point / Sponsor Selective Pricing / System Status Panel 
SSPA Solid State Power Amplifier
SSPC System Status Panel Controller
SSPI Security Service Provider Interface
SSPRU System Status Panel Relay Unit
SSS Server Session Socket / Software Support Services / Strowger Switching System 
SST Single Sideband Transmitter 
SSTDMA Spacecraft Switched Time Division Multiple Access
SSTTSS Space-Space-Time-Time-Space-Space Network
ST Seagate Technology (as in ST506 and ST412 interfaces) / Segment Type / Start / Straight Tip 
STA Spanning Tree Algorithm 
STANO Surveillance Target Acquisition and Night Observation 
STAR Systems and Technology Applications Requirements 
STB Start of Text Block 
STC Serving Test Center / Switching and Testing Center / Switching Technical Center 
STD STandarD
STD Subscriber Trunk Dialing 
STDA StreetTalk Directory Assistance 
STDM Statistical Time Division Multiplexing 
STE Section Terminating Equipment (SONET) / Signal Terminal Equipment / Spanning Tree Explorer 
STEP Software Test and Evaluation Panel 
STF Standard Transaction Format 
STFU Shut The Fu*k Up
STG Strategic Technologies Group 
STI Single Tuned Interstage
STI/ST-TMP Star Trek, first movie/The Motion Picture 
STII/ST-WOK Star Trek, second movie/'Wrath of Khan' 
STIII/ST-SFS Star Trek, third movie/'Search for Spock' 
STIV/ST-TVH Star Trek, fourth movie/'The Voyage Home' 
STM Scanning-Tunneling electron Microscope / Synchronous Transfer Mode
STMF State Management Function 
STMI Synchronous Transport Module i (usually as STM-i)
STM-I Synchronous Transport Module i (usually as STM-i)
STN Super Twisted Nematic (material) 
STOC Symposium on the Theory Of Computing 
Storage Management Subsystem
STP Shielded Twisted Pair / Shielded Twisted Pair / Signal Transfer Point / Signal Transfer Protocol
STR Synchronous Transmit Receive 
STS Shared Tenant Service / Space-Time-Space Network / Synchronous Time Stamp / Synchronous Transport Signal 
STS3C Synchronous Transport System level 3 Concatenated (usually as STS-3c) 
STT Secure Transaction Technology 
ST-TNG Star Trek, The Next Generation 
ST-TOS Star Trek, The Original Series 
STV/ST-TFF Star Trek, fifth movie/'The Final Frontier' 
STVI/ST-TUC Star Trek, sixth movie/'The Undiscovered Country' 
STX Start of TeXt (ASCII) 
SU Service User 
SUA Stored Upstream Address 
SUABORT Session User Abort 
SUB Subaddressing 
SUBLIB SUBroutine LIBrary
SUE Stupid User Error
SUFF Suffix 
SUM Smart Uplink Module 
SUN Stanford University Networks
SUNet Stanford University Network
SUP What's up
SUT System Under Test 
SUV Sport Utility Vehicle 
SVC (frame relay) Switched Virtual Channel / Switched Virtual Circuit
SVCI Switched Virtual Circuit Identifier 
SVD Simultaneous Voice / Data 
SVGA Super Video Graphics Adapter
SVGA Super Video Graphics Array 
SVID System V Interface Definition 
SVN Switched Virtual Network 
SVP Switched Virtual Path 
SVPN Secure Virtual Private Network 
SVS Switched Voice Service 
SW Shareware 
SWAG Scientific Wild A** Guess
SWAK Sealed With A Kiss
SWAN Satellite Wide Area Network / Secure Wide Area Network 
SWaT Special Warez Acquisition Team
SWB SouthWestern Bell 
SWC Serving Wire Center 
SWG Special Working Group / Sub-Working Group / Standards Working Group 
SWIFT Society for Worldwide Interbank Financial Telecommunications 
SWIM Super Woz Integrated Machine
SWL Screaming with Laughter
SWM Semiconductor Worldwide Management 
SWMBO She Who Must Be Obeyed 
SWMC (DMTF) Support Management Working Committee 
SWO Standards Writing Organization 
SWOA Social Workers On Acid (usually as SWoA) 
SWS SoftWare Services 
SX Simplex (signaling) 
SXS Step-by-Step / SxS Strowger Switch
SYC SYstem Control / Synchronize (flag) / SYNchronous / idle (ASCII) 
SYL See you later
SYS See You Soon / System 
SYSCON System Configuration 
SYSEX SYStem EXclusive (message) 
SYSGEN SYStem GENeration 
SYSOP SYStem OPerator, aka God 
Sysop Systems Operator; person who manages a Forum 
T Tera / Terabyte / Tip
T&C Time and Charge
T1/OS T1 Carrier Outstate
T1FE T1 Carrier Front End
TA Thanks Again / Terminal Adapter / Transfer Allowed / Transferred Account 
TAAS Trunk Answer from Any Station 
TAC Technical Assistance Center / Telnet Access Card / Terminal Access Circuit / Terminal Access Controller 
TAD Telephone Answering Device 
TADP Tests and Analyses of Data Protocols 
TAE Transportable Applications Environment
TAFN That's All For Now 
TAFT That's a frightening thought 
TAG Tchnical Advisory Group 
TALiSMAN Teaching and Learning in Scottish Metropolitan Area Networks
TAM Telephone Aswering Machine 
TAMU Texas A&M University
TAN Technical Assistance Center / Telecomm and Networks
TANJ There Ain't No Justice 
TANSTAAFL There Ain't No Such Thing As A Free Lunch 
TAP Technical Assistance Program/Party / Test Access Port / Telephone Assistance Plan / Trans-Atlantic Project
TAPI Telephony Application(s) Program(ming) Interface
TAPIn Training and Awareness Programme in Networks 
TAR Tape Archive
TARFU things are really fouled up 
TARR Test Action Request Receiver 
TAS Telephone Answering Service / The Apostle Syndicate
TASC Technical Assistance Service Center / Technology Applications Sub Committee / Telecommunications Alarm Surveillance and Control System
TASD The Association of Social Disorder
TASI Time Assignment Speech Interpolation
TAT Theoretical Arrival Time / Trans-Atlantic Telephone
TAU Technical Advisory Unit (for UKERNA) / Telematic Access Unit 
TAVL Threaded Adelson - Velskii - Landis (programming method) 
TAXI Transparent Asynchronous Transmitter/Receiver Interface 
TB Terabit (usually as Tb) / TeraByte / Transparent Bridging / Treasury Board 
TBBS The Bread Board System
TBC Time-Based Corrector / Token Bus Controller 
TBD To Be Determined
TBG Telecomm Business Group
TBITS Treasury Board Information Technology Standard 
TBPS Terabits Per Second (usually as Tbps) / TeraBytes Per Second (usually as TBps) 
TBR Technical Basis for Regulation 
TBS Treasury Board Secretariat 
TBT Technology Based Training
TBU Terminals Business Unit
TC Technical Committee / Terminal Controller / Test Conductor / Timing Center / Timing Counter / Toll Center / Toll Charge / Transaction Capabilities / Transfer Cost / Transmission Convergence (sublayer) / Transport Connection 
TCAM Telecommunications Access Method
TCAP Telecommunications Alarm Surveillance / Transaction Capabilities Application Part / Transaction Capabilities Applications Port
TCAS T-Carrier Administration System
TCB Taking Care of Business / Trouble Came Back / Transmission Control Block / Trusted Computing Base / Technical Consulting Center
TCC Trunk Class Code
TCCC Technical Committee for Computer Communications 
TCE The Cutting Edge
TCFW Too cute for words
TCG Teleport Communications Group / Test Call Generation
TCH The Crowbar Hotel
TCI The Criminaly insane / Tele-Communications Inc. / Test Cell Input 
TCIF Telecommunications Industry Forum
TCL TAE Command Language / Tool Command Language (usually as Tcl) 
TCM Test Compression Multiplexer / Time Compression Multiplexor(ing) / Trellis Coded Modulation
TCN Telecommunications Networks 
TCNS Thomas - Conrad Network System 
TCO Test Cell Output 
TCOY Take Care Of Yourself
TCP Transmission Control Protocol / Tape Carrier Package / Test Coordination Procedure 
TCP/IP Transmission Control Protocol/Internet Protocol
TCPA Telephone Consumers Protection Act 
TCQAM Trellis Coded Quadrature Amplitude Modulation
TCR Transient Call Record
TCRTR Technical Committee Reference Technical Report 
TCR-TR Technical Committee Reference Technical Report 
TCS The Criminal Syndicate / The Criminal Syndicate (The Crime Syndicate)/ Trans-Caribbean System (sometimes as TCS-1) / Transmission Convergence Sublayer 
TCS-1 Trans-Caribbean System-1 
TCSEC Trusted Computer System Evaluation Criteria 
TCU Transmission Control Unit 
TD Table Data / Transmit Data (signal) / Typed Data 
TDAS Traffic Data Administration System
TDC Tape Data Controller / Terrestrial Data Circuit
TDCC Transport Data Coordinating Committee
TDD Telecommunications Device for the Deaf
TDDI Twisted-pair Distributed Data Interface 
TDED Trade Data Elements Directory 
TDF Trunk Distribution Frame 
TDI Transit Delay Indication 
TDID Trade Data Interchange Directory 
TDJ Transfer Delay Jitter 
TDM Too Damn Many / Time Division Multiplexing / Time-Division Multiplexing
TDMA Time Division Multiple Access
TDMATBICPLY This Doesn't Mean A Thing But It Confuses People Like You
TDMS Terminal Data Management System
TDR Time Domain Reflectometer(y) 
TDS Transit Delay Selection 
TDSAI Transit Delay Selection And Indication 
TDT The Dream Team
TE Terminal Equipment / Transverse Electric
TED Technology, Entertainment, Design 
TEDIS Trade Electronic Data Interchange System 
TEHO Tail End Hop Off
TEI Terminal End-point Identifier 
TELCO Telephone Company 
TELNET Telecommunications Network / Terminal Emulation Link Network 
TELOP TELeconference OPerator
TELSAM Telephone Service Attitude Measurement
TELSET Telephone Set 
TEM Transverse Electromagnetic 
TEMPEST Transient ElectroMagnetic Emanations STandard
TEN Telephone Equipment Network 
TERC Technology Education Research Center 
TERENA Trans-European Research and Education Networking Association 
TERM Terminal
TF Trap Flag 
TFA Transparent File Access 
TFBS The Fucking Boy Scouts
TFLAP T-Carrier Fault Locating Applications Program
TFM Tagged Font Metric (file) 
TFP TOPS Filing Protocol 
TFS Trunk Forecasting System
TFT Thin Film Transistor
TFTP Trivial File Transfer Protocol / Telnet File Transfer Protocol 
TG Task Group / Technical Guide
TGA Targa (graphic file format) 
TGAL Think Globally, Act Locally
TGB Trunk Group Busy 
TGC Terminal Group Controller
TGID Trunk Group Identification Number
TGIF Thank God Its Friday 
TGITM The Ghost In The Machine
TGL Third Generation Language (3GL)
TGN Trunk Group Number
TGT Ticket - Granting Ticket 
TGW Trunk Group Warning 
TH Table Header / Transmission Header / Trouble History
THANX Thanks 
THC The Hellfire Club
THD Ten High Day 
THD Total Harmonic Distortion
THENET Texas Higher Education Network (sometimes as THEnet) 
THG The Humble Guys
THP The Hill People
THT Token Holding Time 
THX Thanks 
THZ TeraHertz (usually as THz) 
TI Texas Instruments / Time In 
TIA Thanks in advance / Telecommunications Industry Association / Telematic Internetworking Application / Telephone Information Access / The Internet Adapter 
TIAS Telematic Internetworking Abstract Service 
TIATLG Truly, I Am The Living God 
TIC Tongue In Cheek / Token-ring Interface Coupler / TID Transaction IDentifier 
TID Traveling Ionospheric Disturbance 
TIDE Traffic Information Distributor and Editor 
TIDL Transaction Interface Definition Language 
TIFF Tagged Image File Format (graphic file format .tif) 
TIG Topology Information Group (ATM Forum) 
TIGA Texas Instruments Graphics Architecture
TIGER The Internet Gateway and E-Mail Router (Previously known as PIMP) 
TII Technology Independent Interface
TILII Tell It Like It Is
TIMS Transmission Impairment Measuring Sets 
TIN Tracking Identification Number 
TINA Telecommunications Information Networking Architecture 
TINA-C Telecommunications Information Networking Architecture Consortium 
TINAC Telecommunications Information Networking Architecture Consortium 
TINALO This is Not a Legal Opinion
TINAR This is Not a Recommendation
TINWIS That is Not What I Said
TIP Terminal IMP / Terminal Interface Package / Terminal Interface Processor 
TIRIS Texas Instruments Registration and Information System 
TIRKS Trunk Integrated Record Keeping System
TIRPC Transport Independent Remote Procedure Call 
TIS Technical Information Systems
TIU Telematic Internetworking Unit 
TIUA Teknekron Infoswitch Users Association 
TKK The Kiwi Killers
TL Transport Layer 
TLA Three-Letter Acronym (such as this, see also ETLA and DETLA) 
TLAP TokenTalk Link Access Protocol 
TLA's Three Letter Acronyms (such as this)
TLB TransLAN Bridge / Translation Look-aside Buffer
TLD Top Level Domain
TLF Trunk Line Frame 
TLFF Technical Level Feeders Forum 
TLG The Living God 
TLI Transport Library Interface / Transport Layer Interface 
TLM Trouble Locating Manual
TLMA Telematic Agent 
TLMAU Telematic Access Unit 
TLN Trunk Line Network
TLP Transmission Level Point
TLSPP Transport Layer Sequenced Packet Protocol 
TLTP Teaching and Learning Technology Programme / Trunk Line and Test Panel
TLTSN Teaching and Learning Technology Support Network
TLV Type Length Value 
TLX Telex 
TLXAU Telex Access Unit 
TM Trust Me / Terminal Management / Transverse Magnetic
TMC Telemarketing Communications / The Movie Channel / Traffice Management Control (center) / Traffic Management Center 
TMDF Trunk Main Distributing Frame
TMF Test Management Function 
TMI too much info
TMIY Take me, i'm yours
TMMS Telephone Message Management System
TMN Telecommunications Management Network / Time Management Networking
TMP Test Management Protocol 
TMPDU Test Management Protocol Data Unit 
TMR Transient Memory Record 
TMRS Traffic Measurement and Recording System 
TMS Telecommunications Message Switcher / Telephone Management System / Time Multiplexed Switch / Transient Memory Record
TMSCP Tape Mass Storage Control Protocol
TMSWG Traffic Management Sub-Working Group 
TMU Transmission Message Unit 
TN Telephone Number / Transaction Number 
TNC Terminal Node Controller / The Networking Center / Threaded Navy Connector / Threaded Neill-Concelnan connector / Threaded Nut Connector
TNDS Total Network Data System
TNIC Transit Network Identification Code 
TNN Trunk Network Number 
TNO The New Order
TNOP Total/Traffic Network Operation Plan
TNOTVS There's Nothing on Television, so...
TNPC Traffic Network Planning Center
TNS Tolmes News Service / Transaction Network Service 
TNSTAAFL There's No Such Thing As A Free Lunch 
TNT Till Next Time
TNTL Trying not to laugh
TNV Telephone Network Voltage (circuit) 
TNX Thanks
TNX Thanks TNX 1.0E6 Thanks a million
TO Test Object 
TOAO The One and Only
TOBG This oughta be good
TOEM Technical Original Equipment Manufacturer
TOF Top Of File / Top Of Form 
TOM Text Object Model 
TONIC The Online Netskills Interactive Course 
TOP Technical Office Protocol / Technology and Organizational Performance
TOPS Tapes and Optical Products / Timesharing Operating System / Traffic Operator Position System
TOS Technical and Office Systems / Terms Of Service
TOY Thinking Of You
TP Toll Point / Transaction Processing / Transport Protocol (class 0, 1, 2, 3, or 4) / Twisted Pair (wire) 
TP-4 Transport Protocol 4
TPA Third Party Application
TPAD Terminal Packet Assembler / Disassembler 
TPC The Phoney Coders / Transaction Processing Performance Council / Trans-Pacific Cable / Two Phase Commit
TPCC Third Party Call Control 
TPD Third Party Developer
TPDDI Twisted Pair Distributed Data Interface 
TPDU Transport Protocol Data Unit 
TPE Twisted Pair Ethernet 
TPI Tracks Per Inch / Transport Protocol Interface 
TPL Traditional Product Line
TPM TeleProfessional Magazine 
TPMP Total Performance Measurement Plan
TPPD Twisted Pair - Physical-media Dependent
TPPMD Twisted Pair Physical Media Dependent 
TPS This Program Sucks / Transactions Per Second (usually tps) 
TPS(S) This Program Sucks, (Severely)
TPT Third Party Transfer 
TPTAE Third Party Transfer Application Entity 
TPTB The Powers That Be 
TQC Total Quality Control
TQFP Thin Quad Flat Pack
TQM Total Quality Management 
TR (modem) Terminal Ready 
TR Table Row
TR Task (state segment) Register 
TR Technical Report 
TR Test Register
TR Test Responder 
TR Transfer Register
TRAC Technical Recommendation Application Committee 
TRAC Telecommunications Research and Action Center 
TRAC Transactional Records Access Clearinghouse 
TRDMC Tears Running Down My Cheeks
TREAT Trouble Report Evaluation Analysis Tool
TREAT Trouble Report Evaluation and Analysis Tool 
TRI The Remote Informer
TRIB Transmission Rate In Bits 
TRIL Token Ring Interoperability Lab 
TRIN Trinity
TRIP Transcontinental ISDN Project 
TRMTR Transmitter
TRON The Real-time Operating system Nucleus (project)
troo true 
TRP Technology Reinvestment Project 
TRPC Transaction Remote Procedure Call
TRR Tip-Ring Reverse
TRS Tandy Radio Shack / The RapeWare Syndicate
TRSI The Red Sector Inc. 
TRSL Test Requirements Specification Language 
TRSZ The Red Salamander Zaruga (Hey, he offered me chocolate :-) .) 
TRT Token Rotation Timer 
TRWS The Rape Ware Syndicate
TS Time Slot 
TS Time Stamp / Toxic Shock / Traffic Shaping / Transport Service / Transport Stream 
T's&C's Terms and Conditions
TSA Target Service Agent / Technical Support Alliance 
TSAN The Sysop's Area Network / The Sysops Association Network / Tri-State Area (sysop's) Network / Tri-State Area Sysop's Network
TSAP Transport Service Access Point 
TSAPI Telephony Server/Services Application Program Interface 
TSC Telecommunications Security Council
TSCPF Time Switch and Call Processor Frame / Time Switch and Central Processor Frame
TSDU Transport (layer) Service Data Unit 
TSE Terminal Switching Exchange 
TSEL Transport SELector 
TSF Tone Set File 
TSG Telecommunications Systems Group / Timing Signal Generator
TSI Time Slot Interchange(r)
TSJD Texas Size Jelly Donut - official food of Texas sysops 
TSN Terminal Switching Network / The Sierra Network (renamed ImagiNation) 
TSO Technical Services Organization / Terminating Service Office / Time Sharing Option
TSO/E Time Sharing Option / Extensions
TSOHF Total Sense of Humor Failure
TSORT Transmission System Optimum Relief Tool
TSP Technology Strategy and Planning / Test Supervisor / Traffic Service Position
TSPI Telephony Service Provider Interface 
TSPS Traffic Service Position System
TSQL Transact - Structured Query Language 
T-SQL Transact - Structured Query Language 
TSR Terminate and Stay Resident (Computer Program) / Telemarketing Sales Rule / The Syndicate Report
TSS (ITU) Telecommunications Standardization Section / Task State Segment / Time Sharing System / Trunk Servicing System
TSS&TP Test Suite Structure and Test Purposes 
TSSDU Typed data Session Service Data Unit 
TSST Time-Space-Space-Time Network
TST Time-Space-Time Network
TSU Time Sharing User
TT Text Telephone / Trunk Type
TTA Teacher Training Agency / Telecommunication Technology Association 
TTAP Trust Technology Assessment Program
TTBOMK To the Best of My Knowledge
TTC Telecommunications Technology Council / Terminating Toll Center
TTCN Tree and Tabular Combined Notation 
TTCN.GR Tree and Tabular Combined Notation Graphical Representation 
TTCN.MP Tree and Tabular Combined Notation Machine Processable 
TTCNGR Tree and Tabular Combined Notation Graphical Representation 
TTCNMP Tree and Tabular Combined Notation Machine Processable 
TTD Target Transit Delay / Temporary Text Delay 
TTF True Type Font
TTFN Ta Ta For Now [a sign off]
TTI Terminal Transmission Identification / Transmitter Terminal Identification 
TTITMF This thing is too much fun
TTL Time To Live / Transistor-to-Transistor Logic
TTL4N That's The Lot For Now 
TTM Time to Market / To The Moderator
TTML Tagged Text Markup Language 
TTN Tandem Tie-line Network 
TTP Trunk Test Panel
TTRT Target Token Rotation Time 
TTS Text To Speech / Transaction Tracking System / Trunk Time Switch / Trunk-to-Trunk Transfer
TTTN Tandem Tie Trunk Network
TTUL Talk (or Type) To You Later 
TTX Teletex 
TTXAU Teletex Access Unit 
TTY TeleTYpe(writer)
TTYC Teletypewriter Controller
TTYL Talk To You Later 
TTYL(8R) talk to you later
TTYRS Talk To You Real Soon
TTYS Talk to you soon
TUBA TCP and UDP with Bigger Addresses 
TUC Total User Cell (count) 
TUCC Triangle University Computing Center 
TUCD Total User Cell Difference 
TUFD The User File Died
TUFF The Underground Fone Foundation
TUG TeX User's Group 
TUGOS The United Guild Of Sysops
TUIMG Telecom/Utilities Industry Marketing Group
TUP Telephone User Part 
TUR Traffic Usage Recorder(ing) / Trunk Usage Recording / Trunk Utilization Report 
TUTLA Totally Useless Three Letter Acronym 
TV TeleVision
TVC Trunk Verification by Customer 
TV-H TV Line
TVM Thanks Very Much
TVRO TeleVision - Receive Only
TVS Trunk Verification by Station 
TV-V TV Frame
TWA The Warez Alliance
TWA Two-Way Alternate 
TWAIN Technology Without An Interesting Name
TWAT The Winner ANSI Team (usually as TWaT) 
TWCB The Whacko Cracko Brothers
TWICS Two Way Information Communication System 
TWIG Technical Wizard Interest Group 
TWIRP Two-Way Infra-Red Protocol?
TWS Two Way Simultaneous 
TWTA Traveling Wave Tube Amplifier
TWX Teletypewriter Exchange
TWX Telex II
TX Transmit (data) / Transmission 
TXS Telephone eXchange Strowger 
TYCLO Turn your CAPS LOCK off. (Quit shouting.) 
TYL Talk to You Later
TYMNET Timeshare Inc. Network
TYT Take Your Time
TYVM thank you very much 
U& CRL Universities and Colleges Research Libraries 
U/L Universal / Local 
U/L Upload, send to the BBS 
UA Underground America / Universal Access / Unnumbered Acknowledgment / User Account / User Agent 
UAA United Anarchists of America
UAE Unrecoverable application error (Bane of Windows' users!) / User Agent Entity 
UAL User Agent Layer 
UAM User Authentication Method 
UAOS User Alliance for Open Systems 
UAPDU User Agent Protocol Data Unit 
UART Universal Asynchronous Receiver-Transmitter
UAS UnAvailable Second 
UASFE UnAvailable Second, Far End 
UASL User Agent SubLayer 
UAV Unmanned Air Vehicle 
UBCIM Universal Bibliographic Control / International MARC 
UBD User Brain Damage
UBR Unspecified Bit Rate
UC United Couriers
UCAS Universities and Colleges Admissions Service 
UCC Uniform Code Council / Uniform Commercial Codes 
UCD Uniform Call Distribution
UCE Unsolicited Commerical E-mail
UCET Universities Council for the Education of Teachers
UCF Underground Computing Foundation / Untouchable Cracking Force
UCHG Universities and Colleges Hardware Group 
UCISA Universities and Colleges Information Systems Association (Formerly UCTG) 
UCL University College, London 
UCM Universal Cable Module
UCMISG Universities and Colleges Management Information Services Group 
UCNG Universities and Colleges Networking Group 
UCoSDA Universities' and Colleges' Staff Development Agency 
UCR Under Color Removal 
UCS Uniform Communication Standard / Universal Component System 
UCSG Universities and Colleges Software Group, a sub group of UCISA, 
UCTG Universities and Colleges Training Group (Now UCISA) 
UCTLIG Universities and Colleges Teaching, Learning and Information Group 
UD Unit Data 
UDA User-Defined Applications 
UDC Universal Digital Channel / User Defined Command 
UDF Universal Disk Format / Universal Data Format / User Defined Functions 
UDLC Universal Data Link Control 
UDMA Ultra Direct Memory Access
UDP User Datagram Protocol
UDT User Defined Type 
UDVM Universal Data Voice Multiplexer
UE User Element 
UFC Universities Funding Council 
UFD User Friendly Diagnostics
UFS Unix File System 
UGC University Grants Committee 
UHF Ultra - High Frequency 
UHQ Ultra High Quality (image technology) 
UI Unit Interval / UNIX International / Unnumbered Information / Unnumbered Interrupt / User Interface 
UIC User Identification Code
UID User Identification
UIDE User Interface Design Environment 
UIF United Ignorance Front
UIMS User Interface Management Systems 
UIS Universal Information Services 
UIST User Interface Software and Technology (symposium)
UITP Universal Information Transport Plan
UK United Kingdom 
UKERNA United Kingdom Educational and Research Network Association (formerly the JNT) 
UKOLN The United Kingdom Office for Library and Information Networking 
UKRA United Kingdom Registration Authority 
UL Upload, send to the BBS / Underwriters Laboratories / Unordered List / User Location 
ULA Upper Layer Architecture 
ULCC University of London Computing Centre 
ULCT Upper Layer Conformance Testing 
ULL Unix Linkable Library
ULP Upper Layer Protocol / Upper Layer Process 
ULTRA Underground Legion of Terroristic Research Activists
UMA Upper Memory Area
UMB Upper Memory Block
UMD User Manager for Domains 
UME UNI Management Entity 
UML Unified Modeling Language 
UMPDU User Message Protocol Data Unit 
UMSLG University Medical-School Librarians Group 
UN United Nations
UNA Upstream Neighbors Address 
UNC Uniform Naming Convention / Universal Naming Convention 
UNHIOL University of New Hampshire InterOperability Lab 
UNI User-to-Network Interface / User-to-Network Interface (ATM specification) 
UNICODE Unique, Universal, and Uniform character enCoding 
UNISTAR UNIversal Single call Telecommunications Answering and Repair 
UNISTAR Universal Single-Call Telecommunications Answering & Repairing
UNITE User Network Interface to Everything 
UNIVAC Universal Automatic Computer
UNIX Uniplexed Information and Computer Systems
UNJEDI United Nations Joint Electronic Data Interchange 
UNMA Unified Network Management Architecture
UNN Urine Nation News
unPC Politically incorrect
UNTDI United Nations Trade Data Interchange 
UOF Unusual Order Form
UP Uni-Processor 
UPC Universal Product Code / Update Protect Checking / Usage Parameter Control / Utility Port Conditioner
UPH Units Per Hour 
UPI United Phreaker's Incorporated / United Press International 
UPN Universal Product Number 
UPS Uninterruptable Power Supply/System / United Parcel Service / United Pirate Syndicate
UPT Universal Personal Telecommunications 
UPU Universal Postal Union 
URBAN Undaground Rap Blastin Asiatic Newsletter 
URG Urgent (flag) 
URI Uniform Resource Indicator
URL Uniform Resource Locator
URL Uniform Resource Locator / Universal Resource Locator 
URL Universal Resource Locator 
URN Underground Rip-Off Network
URR Urgent reply requested
URSI Union Radio Scientifique Internationale 
US Unit Separator (ASCII) / United States 
USA Undedicated Switch Access / United Software Association / United States Alliance (Amiga Group) / United States of America 
USA/FLT United Software Association/Fairlight
USART Universal Synchronous Asynchronous Receiver / Transmitter 
USB Universal Serial Bus / Upper Side Band
USC User Steering Committee
USCIC U.S. Country Information Center
USDA Uncle Sam's Demo Agency
USDN United States Digital Network
USFDC U.S. Financial Data Center
USIBC U.S. Integrated Business Center
USIPA United States Internet Providers Association 
USITA United States Independent Telephone Association
USL Unix System Laboratories 
USM UnSharp Masking 
USMP U.S. Manufacturing Planning
USNC United States National Committee 
USO Universal Service Order
USOC Universal Service Ordering Code 
USP Universal Sampling Plan
USPL U.S. Price List
USPS United States Postal Service 
USR U.S. Robotics
USRA Universities Space Research Association 
USRT Universal Synchronous Receiver Transmitter 
USSS United States Secret Service 
UST Unresolved Sexual Tension [X-Philes (fans)]
USV User Services 
UT Upper Tester 
UTAM Unlicensed Transition And Management 
UTC Universal Time Coordinated (usually listed as Universal Coordinated Time) 
UTG United Traders of Germany
UTMC United Technologies Microelectronics Center
UTOPIA Universal Test and Operations PHY Interface for ATM 
UTP Unshielded Twisted-Pair 
UTTP Unshielded Telephone Twisted Pair 
UTX Universal Transaction eXchange
UUCICO Unix to Unix Copy Incoming Copy Outgoing
UUCP UNIX to UNIX copy [an archaic file transfer program]
UUID Universal Unique IDentifier 
UUS User to User Signalling 
UUT Unit Under Test 
UVC Universal Voice Channel
UXU Underground Experts United
V Version / Volt 
V&V Verification and Validation
V)=| Pacman Champion
V.FC V.Fast Class 
V+TU Voice Plus Teleprinter Unit 
VA Virtual Address
VAC Value-Added Carrier / Voltage Alternating Current / Volts - A/C Current
VAD Value Added Dealer/Distributor 
VADD Value Added Disk Driver
VADS Value Added Data Services 
VADSL Very-High-Rate Asymmetric Digital Subscriber Line
VAL Value / Voice Application Language
VAM Virtual Access Method
VAN Value Added Network
VAN Value-Added Network 
VAP Value-Added Process
VAR Value-Added Reseller / Value-Added Retailer
VARP VINES Address Resolution Protocol 
VAS Value Added Service 
VAST Variable Array Storage Technology
VAX Virtual Access Extended/eXtension
VAX/VMS Virtual Address Extension/Virtual Memory System
VAXft VAX Fault Tolerant
VAXFT Virtual Address Extension Fault Tolerant (usually VAXft) 
VB Variable Block / Visual Basic 
VBA Visual Basic for Applications
VBE/AI VESA BIOS Extension/Audio Interface
VBI Vertical Blanking Interface
VBI Vertical Blanking Interval 
VBN Vermittelandes BreitbandNetz 
VBNS Very-high-speed Backbone Network Service / Very-high Bandwidth Network Service
VBPJ Visual Basic Programmer's Journal 
VBR Variable Bit Rate
VBS Visual Basic Script 
VC Virtual Call / Virtual Channel / Virtual Circuit / Virtual Container / Virtual Community 
VCC Virtual Channel Connection
VCCI Voluntary Control Council for Interference 
VCD Virtual Communications Driver
VCI Virtual Channel Identifier / Virtual Circuit Identifier
VCL Virtual Channel Link / Visual Component Library
VCOS Visual Caching Operating System
VCP Video Cassette Player
VCPI Virtual Control Program Interface
VCR Victims of Credit Reporting (victims advocacy group) / Video Cassette Recorder
VCS Virtual Circuit Switch / Virtual Circuit System 
VCXO Voltage - Controlled Crystal Oscillator 
VD Video Dox
VDA Visual Data Analysis 
VDC Volts(age) Direct Current
VDD Version Description Document / Virtual Device Driver
VDDM Virtual Device Driver Manager
VDE Video Display Editor / Visual Development Environment / Verband Deutscher Elektrotechniker 
VDI Virtual Device Interface 
VDM Virtual DOS Machine
VDMAD Virtual Direct Memory Access Device
VDS Virtual DMA Services
VDSL Very-high-bit-rate Digital Subscriber Line / Very-high-data-rate Digital Subscriber Line
VDT Video Dial Tone / Video Display Terminal / Visual Display Terminal / Volume Definition Table 
VDU Video Display Unit / Visual Display Unit
VEGA Video-7 Enhanced Graphics Adapter
VEMM Virtual Expanded Memory Manager
VEMMI VErsatile MultiMedia Interface
VER Version 
VERONICA Very Easy Rodent-Oriented Netwide Index to Computerized Archives 
VERR VERify Read access
VERTIS Vehicle, Road, and Traffic Intelligence Society (of Japan) 
VERW VERify Write access
VESA Video Electronics/Equipment Standards Association
VETLA Very Enhanced TLA
VEX Video Extensions for X-windows 
VF Virtual Floppy / Voice Frequency
VFAT Virtual File Allocation Table
VFC Vector Function Chainer / Video Feature Connector / Version.First Class / Video Feature Connector
VFD Vacuum Fluorescent Display
VFP Vertical Forms Printing
VFRP VINES Fragmentation Protocol 
VFS VINES File System / Virtual File Store / Virtual File System 
VFT Voice Frequency Telegraph 
VFU Vertical Forms Unit
VFW Video For Windows
VFY Verify
VG Voice Grade
VGA Video Graphics Adapter / Video Graphics Array
VGB Voice Grade Budget
VGC Video Graphics Controller
VGF Voice Grade Facility
VHDL VHSIC Hardware Description Language
VHF Very High Frequency
VHS Very High Speed / Virtual Host Storage
VHSIC Very High Speed Integrated Circuit
VI Visual Interactive
VIA Vax Information Architecture / Virtual Interface Architecture
VICAR Video Image Communication And Retrieval
VICI Vendor Independent Component Imaging 
VICP VINES Internet Control Protocol 
VICS Voluntary Interindustry Communications Standards (committee) 
VIDS VICAR/Video Interactive Display Subsystem
VIE Virtual Information Environment
VIF VIrtual Interface / Virtual Interrupt Flag
VIM Vendor Independent Mail/Messaging / Video Interface Module
VIN Vehicle Identification Number
VINCE Vendor Independent Network Control Entity 
VINES VIrtual NEtwork Software / Virtual Networking System 
VIO Video Input/Output / Virtual Input/Output
VIP Versatile Interface Processor / VINES (Virtual Networking System) Internet Protocol / Visual Information Processing / VIsual Programmer / Variable Information Processing / Video Information Provider / Virtual Interrupt Pending
VIPC VINES InterProcess Protocol 
VIPER Verifiable Integrated Processor for Enhanced Reliability
VIPR Visual Imperative PRogramming (language) 
VIPS Video Image Printer Systems
VIS Video Information System / Visual Instruction Set / Voice Information System
VISC Video Instruction Set Computing 
VITAL Virtually Integrated Technical Architecture Lifecycle 
VIU Voiceband Interface Unit
VIUF VHDL International Users Forum 
VJHEADER Van Jacobsen Header
VL VESA Local (bus) / Virtual Link 
VLA Volume Licensing Agreement
VLAN Virtual Local Area Network
VLB VESA Local Bus
VLBUS Vesa Local-Bus
VLD Variable-Length Decoder
VLDB Very Large DataBase 
VLF Very Low Frequency
VLIC Very Large Integrated Circuit
VLIW Very Large Instruction Word
VLM Very Large Memory (architecture) / Virtual Loadable Module
VLSI Very Large Scale Integrated circuitry / Very Large Scale Integration 
VLSIPS Very Large Scale Immobilized Polymer Synthesis
VLT Variable List Table
VM Virtual (8086) Mode / Virtual Machine / Virtual Memory / Voice Messaging 
VM/CMS Virtual Machine Conversation Monitor System 
VM/SP Virtual Machine / System Product 
VM/SP Virtual Machine/System product
VMA Virtual Memory Address
VMB Voice Mail Box
VMB Voice Mail Box / Virtual Machine Boot
VMC VESA Media Channel
VMCF Virtual Machine Communications Facility
VMCMS Virtual Machine Conversation Monitor System 
VMD Virtual Manufacturing Device 
VME Versa Module Eurocard / Virtual Memory Environment / Virtual Mode Extensions (OS/2)
VME Versa Module Europa (IEEE 1014) 
VMI Vertical Motion Index 
VMM Virtual Machine Manager / Virtual Memory Manager
VMOS Vertical Metal Oxide Semiconductor
VMP Virtual Modem Protocol
VMR Volt-Meter Reverse
VMRS Voice Message Relay System
VMS Virtual Memory (Operation) System / Voice Message System / Voice Mail System / Voice Management System 
VMSP Virtual Machine System Product
VMT Virtual Memory Technique
VMTP Versatile Message Transaction Protocol 
VN Virtual Network
VNA Virtual Networking Architecture 
VNET Virtual NETwork 
VNF Virtual Network Feature
VNL Via Net Loss (plan) 
VNLF Via Net Loss Factor
VNLP Via Net Loss Plan
VOD Video On Demand
VODAS Voice Over Data Access Station
VOIP Voice over IP (usually as VoIP) 
VOL Volume 
VOLM Volume
VOM Volt Ohm Meter
VOP Velocity Of Propagation 
VOR Visions Of Reality
VOS Virtual Operating System / Verbal Operating System / Voice Operating System
VOTS VAX OSI Transport Service 
VOX Volume Element 
VP Virtual Path
VPA VAX Performance Advisor
VPC Virtual Path Connection
VPCI Virtual Path Connection Identifier 
VPD Virtual Printer Device / Vital Product Data
VPDN Virtual Private Data Network
VPDS Virtual Private Data Service
VPE Video Port Extensions / Virtual Programming Environment
VPI Virginia Polytechnical Institute / Virtual Path Identifier
VPL Virtual Path Link / Virtual Programming Language / Visual Programming Language
VPLA Visual Programming Language for Animation 
VPM Video Port Manager
VPN Virtual Page Number / Virtual Private Network
VPP Peak-Point Voltage (usually Vpp) 
VPS Voice Processing System
VPSC Vault, Process, Structure, Configuration
VPT Virtual Path Terminator 
VPT Virtual Print Technology
VQ Vector Quantication
VR Virtual Reality / Voltage Regulated/Regulator/Regulation 
VRAM Video Random Access Memory
VRC Vertical Redundancy Check 
VRDI Virtual Raster Display Interface
VRE Voltage Regulation Extended 
VRM Voltage Regulator Module
VRML Virtual Reality Markup Language / Virtual Reality Modeling Language
VROOMM Virtual Real-time Object Oriented Memory Manager
VRS Voice Response System
VRT Voltage Regulation Technology
VRTP VINES Routing Transport Protocol 
VRU Voice Response Unit
VRUP VINES Routing Update Protocol 
VS Virtual Scheduling / Virtual Storage 
VS/VD Virtual Source / Virtual Destination
VSAM Virtual Sequential Access Method / Virtual Storage Access Method 
VSAT Very Small Aperture Terminal
VSB Vestigial SideBand (modulation)
VSC VocalTec Software Compression 
VSE Virtual Storage Extended
VSF Vertical Scanning Frequency / Voice Store and Forward 
VSI Virtual Socket Interface
VSIO Virtual Serial Input Output
VSLI Very Large Scale Integration
VSM Virtual Shared Memory / Virtual Storage Management / Visual System Management
VSN Volume Serial Number
VSOS Virtual Storage Operating System
VSPC Visual Storage Personal Computing 
VSPP VINES Sequenced Packet Protocol 
VSR Voice Storage and Retrieval
VSS Voice Storage System
VSSP Voice Switch Signaling Point
VSVD Virtual Source / Virtual Destination
VSWR Voltage Standing Wave Radio
VSYNC Vertical Sync
VT Vertical Tabulation (ASCII) / Video Terminal / Virtual Terminal / Virtual Tributary 
VTAM Virtual Telecommunications Access Method
VTAME Virtual Telecommunications Access Method Entry 
VTC Volume Tape Catalog 
VTG Virtual Trunk Group 
VTI Virtual Terminal Interface
VTNS Virtual Telecommunications Network Service
VTOA Voice and Telephony Over ATM
VTOC Volume Table of Contents
VTP Virtual Terminal Protocol 
VTPP Variable Team Pricing Plan 
VTR Video Tape Recorder 
VTS Video Teleconferencing System
VTX Videotex
VU Volume Unit 
VUE Visual User Environment 
VUI Video User Interface
VUIT Visual User Interface Tool
VUP VAX Unit of Performance
VUP Vax Unit of Processing
VWB Visual WorkBench
VxD Virtual Device Driver
VXD Virtual eXtended Driver
W Watt 
w/ with
W3 World Wide Web
W3A World Wide Web Applets
W3C World Wide Web Consortium 
W4 What-Works-With-What
W4WG Windows For WorkGroups
WA Write Audit 
WAAS Wide Area Augmentation System
WAB What, Another Bill
WABI Windows Application Binary Interface
WACK Wait for Acknowledgment 
WACS Western and Central States
WAG wild ass guess 
WAIS Wide Area Information Server/Service/Search
WAITS Wide Area Information Transfer Systems
WAMKSAM Why are My Kitties (Kids) Staring at Me
WAN Wide Area Network
WAOSS Wide Angle Optoelectronic Stereo Scanner
WAP Wireless Access Protocol / Wireless Application Protocol 
WARC World Administrative Radio Conference 
WARP Weather And Radar Processor systems 
WAS Wild A** Guess / Web Application Server / Windows Application Server 
WASP Warriors Against Software Protection
WATS Website Activity Tracking Statistics / Wide Area Telecommunications Service / Wide Area Telephone Service 
WAV Wave (waveform) data file (music)
WAVES Waveform And Vector Exchange Specification 
WAYW What are you wearing?
WB Welcome back
WBC WideBand Channel 
WBEM Web-Based Enterprise Management
WBEM Web-Based Enterprise Management (initiative) 
WBS Write Back Soon / Work Breakdown Structure 
WC WildCat! (BBS Software) / Wire Center / Word Count
WCC World Congress on Computing 
WCPC Wire Center Planning Center
WCS Wireless Communication Service(s) / World Coordinate System
WCU Water Cooling Unit
WD Working Document / Working Draft 
WDCS Wideband Digital Cross-Connect System
WDF World Domination Force
WDL Window Driver Library
WDM Wave(length) Division MultiPlexing / Win32 Driver Model / Windows Driver Model 
WDRAM Windows Dynamic Random Access Memory
WDT Watch Dog Timer
WDYLL What do you look like?
WDYMBT What do You Mean by That?
WEBNFS WEB Network File System
WEC Westinghouse Electric Corporation 
WELAC Western Europe Laboratory Accreditation Cooperation 
WELL Whole Earth 'Lectronic Link
WEP Well-known Entry Point 
WEPN Worldwide Electronic Publishing Network 
WES Western Electronics Switching
WESST Western Engineering Student Society Team 
WF WorkFlow 
WFM Works For Me 
WFMC Workflow Management Coalition (usually as WfMC) 
WFMTUG World Federation of MAP / TOP Users' Group 
WFP Well Formed Path
WFQ Weighted Fair Queuing 
WFW Windows For Workgroups (sometimes as WfW) 
WG Working Group 
WGAS Who gives a sh*t? 
WGS Work Group System
WH Watt-Hour 
WHAM Waveform Hold and Modify
WHC Workstation Host Connection
WIBAMU Well, I'll be a Monkey's Uncle
WIBNI Would It Be Nice If
WIC WAN Interface Card 
WIDE Widely Interconnected Distributed Environment 
WIDL Web Interface Definition Language 
WIL Windows Interface Language 
WIMP Washed-up Information Media Phobe / Window Icon Mouse Pointer (interface) 
WIN Windows / Wissenschaftsnetz (science network) 
WINDO Wide Information Network for Data Online 
WINDOWS Will Install Needless Data On Whole System / Won't Intentionally Nacker Drive Or Wipe Spreadsheets
WINE WINdows Emulator
WINFORUM Wireless Information Networks Forum
WINGS Web Interactive Network of Government Services 
WINHEC WINdows Hardware Engineering Conference
WINS Warehouse Information Network Standards / Windows Internet Name Service
WIP Work In Progress/Process / Workcenter Information Package
WIPO World Intellectual Property Organization
wirld world
WISE WordPerfect Information System Environment
WIT Web Interactive Talk
WITT Workstation Interactive Test Tool 
WizOp Wizard Sysop; the primary Forum Administrator/Sysop 
WL Word Line / Wright-Patterson Laboratory 
WLIF Wireless LAN Interface Forum 
WM Work Manager
WMC Workflow Management Coalition
WMF Windows Metafile (usually as .WMF) / Workload Monitoring Function 
WMMOWS Wash My Mouth Out with Soap
WNIC Wide area Network Interface Co-processor
WNIM Wide area Network Interface Module
WNOHGB Where No One Has Gone Before 
WOA Work Of Art 
WOB Waste of Bandwidth
WOFTAM Waste Of Flaming Time And Money 
WOM Web Object Management
WORM Write Once - Read Many 
WOS Workstation Operating System
WOSA Windows Open Services Architecture / Windows Open Services Architecture
WOTW Word of the week
WOW Windows On Windows (layer) 
WP White Pages / Word Perfect / Word Processing / Write Protected / Working Party 
WPD Windows Printer Description (file) 
WPE World Pirate Echo
WPG WordPerfect Graphics (format) (usually .WPG) 
WPHD Write-Protect Hard Disk
WPM Words Per Minute
WPM Words Per Minute (usually as wpm) 
WPOS WorkPlace Operating System
WPS Windows Printing System / WorkPlace Shell / Word Processing Software
WPVM Windows Parallel Virtual Machine
WRAM Window Random Access Memory
WRB Web Request Broker
WRBD Web Request Broker Dispatcher
WRK Windows Resource Kit
WRQ Walker Richer + Quinn 
WRT With Regard To / With Respect To 
WRU Who Are You 
WS WorkStation
WSAPI Web Site Application Program Interface
WSAT WinSock Application Programming Interface Test 
WSF WorkStation Function 
WT Without Thinking / Write Through
WTB Wireless Telecommunications Bureau 
WTF What The F**k / Who the Fu** !
WTFDIK What the Fu#? Do I Know 
WTFIGO What The Fu** Is Going On?
WTFRU? Who the F#~$ are you?
WTG Way To Go
WTG! Way to Go! 
WTGP Want to go private?
WTH What/Who The Heck / What/Who the Hell
WTLOB watch "The Life of Brian"
WTM White Trash Magazine
WTO World Trade Organization 
WTOR Write To Operator with Reply
WTTM Without Thinking Too Much 
WUI Western Union International 
wuz was
WVIEW World View (Magazine) 
WVIEW World View Magazine
WW Weenie Warriors
WW World - Wide / Worldwide
WWAN Wireless Wide Area Network
WWIS World Wide Information System
WWMCCS WorldWide Military Command and Control System 
WWW World Wide Wait / World Wide Web
WWWW World Wide Web Worm 
WYGIWYPF What You Get Is What You Pay For 
WYLABOCTGWTR Would You Like a Bowl of Cream to go with That Remark?
WYLASOMWTC Would You Like a Saucer of Milk with that Comment?
WYMM Will You Marry Me? 
wymyn women
WYPIWYG What You Printed Is What You've Got
WYSBYGI What You See Before You Get It
WYSIAWYG What You See is Almost What You Get
WYSIAYG What You See Is All You Get 
WYSINWNWYG What You See Is No Where Near What You Get
WYSINWYG What You See Is NOT What You Get
WYSIWYG What You See Is What You Get
WYTYSYDG What You Thought You Saw, You Didn't Get
WYWO While You Were Out
X Cross / eXchange / eXpanded / eXtended / eXtension / Transfer 
X-) Cross Eyed
X-) Unconscious
X2B heXadecimal to Binary
X2C heXadecimal to Character
X2D heXadecimal to Decimal
XA eXtended Architecturee / eXtended Attribute
XALS eXtended Application Layer Structure 
XAPIA X.400 Application Program Interface Association
XB X-Bar (Crossbar)
XBAR X-Bar (CrossBAR)
XBM X Bit Map 
XBT CrossBar Tandem / X - Bar Tandem 
XCMD eXternal CoMmanD
XCOST Transfer Cost
XDF eXtended Density Format
XDR eXtended Data Representation / eXternal Data Representation
XDS X/Open Directory Service 
XFCN eXternal Function
XFE X-Bar Front End
XFMC Cross Functional Management Committee
XFN X/Open Federated Naming (specification) 
XGA eXtended Graphics Adapter/Array
XID eXchange IDentifier
XIF Xerox Image File 
XIOS eXtended Input/Output System
XIP eXecution In Place 
XMH X Mail Handler 
xmit Transmit
XML eXtensible Markup Language
XMM eXtended Memory Manager
XMP X/Open Management Protocol 
XMS eXpanded Memory Service / eXtended Memory Specification / Extended Multiprocessor (operating) System 
XNA Xerox Network Architecture 
XNS Xerox Network Services/System
XO eXactly Once 
XOFF Transmitter Off 
XOM X/Open OSI abstract data Manipulation 
XON Transmitter On 
XOR eXclusive OR
XP Experience (Common MUD term)
XPD Cross Polarization Discrimination 
XPG X.400 Promotion Group / X/Open Portability Guide 
XPRM Xerox Print Resources Manager
XPSDU eXpedited Presentation Service Data Unit 
XQL Xtructured Query Language 
XRT eXtensions for Real-Time
XSMD eXtended Storage Module Drive
XSSDU eXpedited Session Service Data Unit 
XSSI eXtended Server Side Includes
XSV Transfer Cost System Value
XT eXTended
XTC Extended Test Controller / eXternal Transmit Clock 
XTCLK eXternal Transmit CLocK
XTI X/Open Transport-layer Interface 
Xtian Christian
XTLA Extended Three Letter Acronym 
XTP eXpress Transfer Protocol / eXpress Transport Protocol
xxooxxoo Love (or hugs) & kisses
Y2K Year 2000
YAA Yet another acronym
YABA Yet Another Bloody Acronym 
YABSA Yet Another Bl**dy Stupid Acronym 
YAHOO Yet Another Hierarchical Officious Oracle
YAISB Yet Another Information Supercliche Book
YAM Yet Another Meeting / Yet Another Modem / Youngster's Against McAfee / Youths Against McAfee
YAOTM Yet Another Off-Topic Message
YBS You'll Be Sorry
YCHT You can have them
YG Young Gentleman
YHBM You Have Bin Mail
YHGASPL You Have Got A Serious Problem, Lad!
YHM You have mail
YIPL Youth International Party Line 
YKYHBxTLW You Know You Have Been x Too Long When (eg, YKYHBPDTLW - You Know You have Been Playing Doom Too Long When...)
YL Young Lady
YLNT You look nice tonight
YM Young Man
YMMV Your mileage may vary
YMMV Your Mileage May Vary - meaning, this was my experience, yours might be different.
YMMV Your Mileage May Vary. 
YMMVG Your mileage may vary greatly 
YMS Young Micro Systems
YMU Y-Net Management Unit 
YOYOW You Own Your Own Words 
YP Yellow Pages
YSN You suck, Nerd
YSS You Suck Severely
YSWUS Yea, Sure Whatever You Say!
YTD Year To Date
YTF YIG - Tuned Filter
YWSYLS You win some, you lose some
ZAI Zero Administrative Initiative
ZAW Zero Administration for Windows
ZBR Zone-Bit Recording
ZCAV Zoned Constant Angular Velocity
ZD Ziff-Davis
ZDL Zero Delay Lockout
ZDS Zenith Data Systems
ZF Zero Flag
ZIF Zero Insertion Force (socket) 
ZIP Zig-Zag In-Line Package / Zig-zag In-line Package / Zone Improvement Plan / Zone Information Protocol 
ZIS Zone Information Socket 
ZIT Zone Information Table 
ZMA Zone Multicast Access 
ZPV Zoomed Port Video
ZSL Zero Slot LAN