A...

AA        Auto Answer
AAA   Authentication, Authorization and Accounting
AAB       All-to-All Broadcast
AAL       Asynchronous Transfer Mode Adaption Layer
AAM   Automatic Acoustic Management
AAP       Applications Access Point [DEC]
AARP      AppleTalk Address Resolution Protocol
AAS       All-to-All Scatter
AASP      ASCII Asynchronous Support Package
AAT       Average Access Time
AATP      Authorized Academic Training Program [Microsoft]
.ABA      Address Book Archive (file name extension) [Palm]
ABC    *  Atanasoff-Berry Computer  (First digital
          calculating machine that used vacuum tubes)
ABEND     Abnormal End
ABI       Application Binary Interface
ABIOS     Advanced BIOS
ABIST     Automatic Built-In Self-Test [IBM]
ABLE      Adaptive Battery Life Extender
ABM   Asynchronous Balanced Mode
ABR       Available Bit Rate
ABRD   Automatic Baud Rate Detection
ABRS      Automated Book Request System [British Library]
ABS       Address Book Synchronization [IBM] + Absolute
ABT       Abort
ABTS      ASCII Block Terminal Services
AC        Autocheck + Automatic Computer + Alternating Current
ACAP      Application Configuration Access Protocol
ACC       Accumulator
ACCMAIL   Accessing the Internet Via Email
ACD       Automatic Call Distribution
AC/DC   Alternating Current/Direct Current
ACDI      Asynchronous Communications Device Interface
ACE       Access Control Encryption/Entry +
          Adobe Certified Expert +
          Advanced Computing Environment [SCO] +
          Adverse Channel Enhancements [Microcom] +
       *  Automatic Computing Engine
ACF       Access Control Field +
          Advanced Communications Function
ACH       Automated Clearing House
ACIAS     Automated Calibration Interval Analysis System
ACIS      American Committee for Interoperable Systems
ACK       Acknowledgment
ACL       Access Control List + Asynchronous Connection-Less (link)
ACM       Association for Computing Machinery
          Audio Compression Manager [Microsoft]
ACMS      Application Control Management System
ACP       Ancillary Control Program + Auxiliary Control Process
ACPI      Advanced Configuration and Power Interface
ACR       Allowed Cell Rate
ACROSS    Automated Cargo Release and Operations
          Service System
ACS       Access + Access Control Set + Access Control System +
        * Advanced Computer System [IBM] +
          Anti Curl System + Asynchronous Communication Server
ACSS      Audio Cascading Style Sheets
ACTS      Automated Computer Time Service
ACTT      Advanced Communication and Timekeeping Technology [Seiko]
ACU       Automatic Calling Unit
ACVC      Ada Compiler Validation Capacity
A/D       Analog to Digital
ADA       Automatic Data Acquisitions +
          (Programming Language named after Augusta Ada Lovelace)
ADB       Apple Desktop Bus
ADC       Adaptive Data Compression (protocol) [Hayes] +
          Add with Carry + Analog to Digital Converter
ADCCP     Advanced Data Communication Control Procedures/Protocol
ADD       Automatic Document Detection [WordPerfect]
ADF       Automatic Document Feeder +
          Automatically Defined Function
.ADF      Adapter Description File (file name extension)
ADI       AutoCad/AutoDesk Device Interface (driver)
ADL       Address Data Latch
ADLAT     Adaptive Lattice Filter
ADLC      Adaptive Lossless Data Compression [IBM] +
          Asynchronous Data Link Control
ADMACS    Apple Document Management And Conrol System
ADMD      Administrative Management Domain [X.400]
.ADN      Add In Utility (file name extension)
          [Lotus 1-2-3] [LDC]
ADO       ActiveX Data Objects
ADP       AOLserver Dynamic Pages + Automatic Data Processing
ADPCM     Adaptive Differential Pulse Code Modulation
ADR       Address
ADS       Application Development Solutions [AT&T] +
          Application Development System +
          Automatic Distribution System
ADSC      Address Status Changed +
          Adobe Document Structuring Conventions
ADSI      Active Directory Service Interface [Microsoft] +
          Analog Display Services Interface
ADSL      (See DSL)
ADSP      AppleTalk Datastream Protocol
ADSR      Attack, Decay, Sustain, Release
ADT       Abstract Data Type + Application Data Types
ADU       Automatic Dialing Unit
AE        Above or Equal
AEB       Analog Expansion Bus [Dialogic]
AEC       Architecture, Engineering, Construction
.AERO   Aviation Industry (Domain Name) [Internet]
AES       Advanced Encryption Standard
AESA      ATM End System Address
AF        Auxiliary carry Flag
AFA       Accelerated File Access
AFC   Antiferro-Magnetically Coupled (media) [IBM] +
          Automatic Font Change + Automatic Frequency Control
AFD       Automatic File Distribution
AFDW      Active Framework for Data Warehousing [Microsoft]
AFI       Authority and Format Identifier
AFII      Association for Font Information Interchange
AFIRM     Automated Fingerprint Image Reporting and Match
AFIS      Automated Fingerprint Identification System
.AFM      Adobe Font Metrics (file name extension) [Adobe Systems]
AFP       Advanced Function Presentation [IBM] +
          Advanced Function Printing +
          Appletalk Filing Protocol [Macintosh]
AFS       Andrew File System (protocols)
AFTP      Advanced/Anonymous File Transfer Protocol
AGA       Advanced Graphics Adapter
AGC       Automatic Gain Control
AGP       Accelerated/Advanced Graphics Port
AGRAS     Antiglare-Antireflective-Antistatic
AGU       Address-Generation Unit
AH   Authentication Header (protocol)
AHS       Automated Highway Systems
AI        Analog Input + Artificial Intelligence
AIA       Applications Integration Architecture [DEC]
AIC       AIXwindows Interface Composer [IBM]
AIFF      Audio Interchange File Format
AIIM      Association for Information and Image Management
AIM       AOL Instant Messenger
AIN       Advanced Intelligent Network [Bell Atlantic]
AIP   Application Infrastruture Provider
AIR       Architecture Implementation Review
AIS       Automated Identification System [NCIC] +
          Automated Information Systems
AISB      Association of Imaging Service Bureaus
AISP      Association of Information Systems Professionals
AIT       Advanced Intelligent Tape (drive) [Sony]
AIX       Advanced Interactive Executive [IBM]
ALAT   Advanced Load Address Table
ALC       Arithmetic and Logic Circuits +
          Automatic Level Control
ALE       Address Latch Enable +
          Application Linking and Embedding
ALGOL     Algorithmic Oriented Language (see IAL)
ALIBI     Adaptive Location of Internetworked Bases
          of Information
kALICE   Artificial Linguistic Internet Computer Entity
ALINK     Active Link [HTML]
ALIWEB    Archie Like Indexing in the Web [Internet]
ALN       Asynchronous Learning Network
ALP   Automatic Language Processing
ALR       Advanced Logic Research, Inc.
ALT       Alternate (mode)
ALT.      Alternate lifestyle [USENET Newsgroup Category]
ALU       Arithmetic Logic Unit
AMA       Automatic Message Accounting
AMANDDA   Automated Messaging and Directory Assistance
AMASS     Archival Management and Storage System
AMD       Active Matrix Display + Advanced Micro Devices, Inc.
AMI       Alternate Mark Inversion + American Megatrends, Inc. +
          Application Messaging Interface
AMMA      Advanced Memory Management Architecture
          [Everex Systems]
AMPS      Advanced Mobile Phone Service
AMR   Audio Modem Riser
ANCOVA    Analysis of Covariance
ANDF      Architecture-Neutral Distribution Format
ANI       Automatic Number Identification
.ANI      Animated Cursor (file name extension) [Microsoft]
ANN       Artificial Neural Network
.ANN      Annotations (file name extension) [IBM]
ANOVA     Analysis Of Variance
ANSI      American National Standards Institute
ANX       Automotive Network Exchange [Chrysler/Ford/
          General Motors]
AO        Analog Output
AOCE      Apple Open Collaboration Environment
AO/DI     Always On/Dynamic ISDN
AOE       Application Operating Environment [AT&T]
AOL       America Online
AOS       Add Or Subtract
AP        Adjunct Processor + Application Processor
A/P       Accounts Payable
APA       Adaptive Packet Assembly +
          All Points Addressable +
          Arithmetic Processing Accelerator
APAR      Authorized Program Analysis Report [IBM]
APAREN    Address Parity Enable [IBM]
APCUG     Association of PC User Groups
APDU      Application Protocol Data Units
API       Application Program Interface
APIC      Advanced Programmable Interrupt Controller (bus) [Intel]
APIS      Advanced Passenger Information System
APL     * A Programming Language (Mathematics)
APM       Advanced Power Management [IBM]
APNIC     Asia-Pacific Network Information Center [Internet]
APOP      Authenticated Post Office Protocol
.APP      Application (file name extension) [R:Base]
APPC      Advanced Program-to-Program Communications [IBM]
APPI      Advanced Peer-to-Peer Internetworking
APPLETS   Applications
APPN      Advanced Peer-to-Peer Networking [IBM]
APPS      Applications
APRP      Adaptive Pattern Recognition Processing
APS       Advanced Photo System + Advanced Printing Service [IBM]
          Asynchronous Protocol Specification
APSE      ADA Programming Support Environment
APT       Address Pass Through +
          Advanced Parallel Technology +
          Automatically Programmed Tools
A/R       Accounts Receivable
ARA       AppleTalk Remote Access
ARAG      Antireflective-Antiglare
ARAS      Antireflective-Antistatic
.ARC      Archive (file name extension)
ARCA      Advanced RISC Computing Architecture
ARCnet    Attached Resource Computer Network
.ARJ      Compressed File (file name extension) [Jung]
ARL       Adjusted Ring Length
ARLL      Advanced Run Length Limited
ARM       Advanced RISC Machine (processor) +
          Annotated Reference Manual +
          Asynchronous Response Mode
ARMA      Association of Records Managers and Administrators
ARP       Address Resolution Protocol [Novell]
ARPANET   Advanced Research Projects Agency Network
ARPL      Adjust Requested Privilege Level
ARS   Activity Reporting System [Unisys]
ART   Adaptive Resonance Theory (algorithm)
ARTA      Apple Real Time Architecture
ARTIC     A Real-Time Interface Coprocessor [IBM]
ARTS      Asynchronous Remote Takeover Server
.ARTS     Cultural Groups (Domain Name) [Internet]
ARTT      Asynchronous Remote Takeover Terminal
ARQ       Automatic Repeat Request
ARU       Audio Response Unit
AS        Autonomous System [Internet]
ASAI      Adjunct Switch Application Interface [AT&T]
ASAP      As Soon As Possible +
          Automatic Switching And Processing
AS3AP     ANSI SQL Standard Scalable and Portable
ASB       Advanced System Buffering [Intel]
.ASC      ASCII text (file name extension)
ASCC    * Automatic Sequence Controlled Calculator [IBM]
ASCII     American Standard Code for Information Interchange
ASD   Application Structure Database [Microsoft] +
   Automatic Skip Driver [Microsoft]
ASF       Active/Advanced Streaming Format [Microsoft]
ASIC      Application-Specific Integrated Circuit
ASIT      Advanced Security and Identification Technology
ASL       Adaptive Speed Levelling
ASLM      Apple Shared Library Manager [Macintosh]
.ASM      Assembler Source Language (file name extension)
ASMP      Asymmetric Multprocessing
ASN       Abstract Syntax Notation + Autonomous System Number
ASO       Automated Systems Operations
ASP       Active Server Page [Microsoft] +
          Application/Authorized Service Provider +
   Aspect Oriented Programming +
          Association of Shareware Professionals
.ASP      Active Server Page (file name extension)
ASPI      Advanced SCSI Programming Interface [Adaptec]
ASP.NET   .NET-Based Active Server Pages
ASPS      Advanced Signal Processing System
ASR       Address Space Register + Automatic Send-Receive +
          Automatic Speech Recognition +
   Automatic System Recovery
AST       AST Research, Inc. (named from first initials of
          the founders: Albert Wong, Safi Qureshey, Thomas Yuen)
AS/U      Advanced Server for Unix
ASYNC     Asynchronous
AS/400    Application System/400 [IBM]
AT        Advanced Technology + Attention
ATAPI     Advanced Technology Attachment Packet Interface
ATC   Advanced Transfer Cache
ATDP      Attention Dial Pulse
ATDT      Attention Dial Tone
ATE       Automated Test Equipment
ATG       Advanced Technology Group
ATH       Attention Hang-Up (Modem command)
ATL       Active Template Library
ATM       Adobe Typeface Manager + Air Traffic Management +
          Asynchronous Transfer Mode + Automated Teller Machine
ATPS      AppleTalk Printing Services [Macintosh]
ATR       Automatic Terminal Recognition
ATS       Administrative Terminal System +
          Apple Terminal Services
AT&T      American Telephone and Telegraph
ATTN      Attention
ATTRIB    Attribute (also ATR)
ATX       Advanced Technology Extended [Intel]
ATZ       Attention Restore configuration profile from
          nonvolatile RAM (Modem command)
.AU       Audio (file name extension)
AUDIT     Automated Data Input Terminal
AUI       Attachment/Autonomous Unit Interface
AUP       Acceptable Use Policy [Internet]
AUTO      Automatic
AUTOEXEC  Automatic Execution
AUX       Auxiliary + (First Serial Port)
AV        Audio/Video + Audiovisual + Authenticity Verification
AVA       Audio Visual Authoring [IBM]
AVC       Audio Visual Connection [IBM]
AVD       Alternating Voice and Data
AVG       Average
AVI       Audio Visual Interleave [Microsoft]
AVL   AVL Tree (named after its founders:
   Adelson, Veiskii and Landis
AVP       Attribute-Value Pair
AVR       Automatic Voice Recognition
AVT       Applied Voice Technology
AVVID   Architecture for Voice Video & Integrated Data [Cisco]
AWE       Advanced Wave Effects [Creative Lab]
AWG       American Wire Gage
AWK       (Unix language named after its authors...
          Al Aho, Peter Weinberger and Brian Kernighan)
AWS       Advanced Workstations and Systems (group) [IBM]
AWT       Abstract Window Toolkit [Java]
AX        Architecture Extended + Automatic Transmission

B...

BA   Bell Atlantic (company)
BACP      Bandwidth Allocation Control Protocol
BAK       Binary Adaptation Kit [Microsoft]
.BAK      Backup (file name extension)
BAL       Basic Assembly Language
BALUN     Balanced Unbalanced (device)
BAM       Boyan Action Module
BAPI      Business Application Programming Interface [SAP]
BARTS     Bell Atlantic Regional Timesharing
.BAS      Basic Language (file name extension)
BASH      Bourne Again Shell [Unix]
BASIC     Beginner's All-purpose Symbolic Instruction Code
BASM      Built-In Assembler
BAT       Block Address Translation
.BAT      Batch Processing (file name extension)
B2B   Business-To-Business
BBS       Bulletin Board System
B2C   Business To Consumer
BCC       Block Check Character
BCC:      Blind Carbon Copy
BCD       Binary Coded Decimal
B-CHANNEL Bearer Channel
BCL       Base Class Libraries + Batch Command Language
BCN       Beacon
BCNF   Boyce-Codd Normal Form
BCP       Best Current Practice + Bulk Copy Program
BCPL      Basic Computer Programming Language
BCR       Byte Count Register
BCS       Bar Code Sorter
BDA       Bios Data Area
BDC       Backup Domain Controller
BDE       Borland Database Engine [Borland]
BDLS      Bidirectional Loop Switching
BDM   Background Debug Mode
BDOS      Basic Disk Operating System
BDR       Bus Device Request
BDSL      (See DSL)
BE        Below or Equal
B2E       Business To Employees
BECN      Backward Explicit Congestion Notification
BEDO      Burst Extended Data Out
BEEP   Blocks Extensible Exchange Protocol
BEL       Bell
BELLCORE  Bell Communications Research
BER       Basic Encoding Rules + Bit Error Rate
BERT      Bit Error Rate Test/Tester
BF        Bad Flag
B/F       Background/Foreground
.BFC      Briefcase (file name extension) [Microsoft]
BFF       Binary File Format [IBM]
BFT       Binary File Transfer
BFTP      Batch FTP
BGA       Ball Grid Array
BGCOLOR   Background Color [HTML]
BGE       Branch if Greater or Equal
.BGI      Borland Graphic Interface (file name extension)
BGP       Border Gateway Protocol
BGT       Branch if Greater Than
BHI       Branch if Higher
BHIS      Branch if Higher or Same
BI        Binary Input
.BIB      Bibliography (file name extension)
BiDi      Bi-Directional
BIFET     Bipolar Field Effect Transistor
BIFF      Binary Interchange File Format
BIM       Beginning of Information Marker
.BIN      Binary (file name extension)
BINAC   * Binary Automatic Computer
BIND      Berkeley Internet Name Domain
BINHEX    Binary Hexadecimal
BIOS      Basic Input/Output System
BIS       Business Information System
BISDN     Broadband Integrated Services Digital Network
BIST      Built-In Self-Test
BiSYNC    (See BSYNC)
BIT       Binary Digit
BITNET    Because It's Time Network
BITNIC    Bitnet Network Information Center
BIU       Bus Interface Unit
BIW       Business Intelligence Warehouse [SAP]
BIX       Byte Information Exchange (BBS)
.BIZ      Businesses (Domain Name) [Internet]
.BK!      Backup (file name extension) [WordPerfect]
.B~K      Backup (file name extension)
BKSP      Backspace
BL        Backlit + Bit Line
BLAST   Bell Labs Layered Space Time +
          Blocked Asynchronous Transmission (protocol)
          [Communications Research Group]
.BLD      BASIC Bload Graphics (file name extension)
BLE       Branch if Less or Equal
BLER      Block Error
BLK       Block
BLMC      Buried Logic Macrocell
BLOB      Binary Large Object
BLOG   Web Log
BLOS      Branch if Lower Or Same
BMI       Branch if Minus
BMIC      BusMaster Interface Controller [Intel]
BMP       Basic Mapping Support + Basic Multilingual Plane +
          Batch Message Processing Program
.BMP      Bitmap (file name extension) [Paintbrush Format]
BNC       Bayonet Neill-Concelman (connector used with
          coaxial cable invented by Mr. Neill-Concelman) +
   British Naval Connector
BNE       Branch if Not Equal
BNF       Backus-Naur Form (also Backus-Normal Form) [developed by
          John Backus and Peter Naur]
BNS       Backbone Network Service
BO        Binary Output
BOA    Basic Object Adapter
BOB       Break-out Box
BOC       Basic Operator Console
BOF       Beginning Of File
BOM       Basic Online Memory [IBM] + Beginning Of Message
BOND      Bandwidth On Demand
BOOTP     Bootstrap Protocol [Internet]
BOPS      Billion Operations Per Second
BORPQU    Borland Pro Quattro
BORQU     Borland Quattro
BOS       Basic Operating System
BOT       Beginning Of Table + Beginning of Tape + Robot
BP        Base Pointer
BPB       BIOS Parameter Block
BPDU      Bridge Protocol Data Unit
   Berkeley Packet Filter
BPI       Bits Per Inch
BPL       Branch if Plus
BPP       Bits Per Pixel
BPR   Broadband Provisioning Registrar [Cisco]
          Business Process Re-engineering [Linux]
BPS       Bits Per Second + Bytes Per Second
BPSK      Binary Phase Shift Keying
BR        Bad Register
BRGC      Binary Reflected Gray Code
BRI       Basic Rate Interface + Brain Response Interface
BS        Backspace
BSAM      Basic Sequential Access Method
BSC       Base Station Controller + Binary Synchronous Communication
.BSC      Boyan Script (file name extension) [Boyan Communications]
BSCS      Bachelor of Science (Degree) in Computer Science
BSD       Berkely Software/Standard Distribution
BSF       Bit Scan Forward
BSI       British Standards Institute
BSM       Basic Storage Module [IBM]
BSP       Bulk Synchronous Parallelism
BSR       Bit Scan Reverse
BS-RAM    Burst Static RAM
BSS       Block Started by Symbol
BST   Binary Search Tree
BSY       Busy
BSYNC     Binary Synchronous Communications (protocol)
BT        Bit Test
BTAM      Basic Telecommunications Access Method [IBM]
BTB       Branch Target Buffer
BTC       Bit Test and Complement
BTI   Business Type Identifier
BTOA      Binary To ASCII
BTP       Batch Transfer Program
BTR       Bit Test and Reset
BTS       Base Transceiver Station + Bit Test and Set
BU        Branch Unit
BUBL      Bulletin Board for Libraries [Janet]
BUF       Buffer
BUS       Broadcast and Unknown Server
BVH       Base Video Handler
BWM       Block-Write Mode
B2X       Binary To Hexadecimal [REXX]
BYTE      Binary Element String
 

C...

C         C Programming Language
.C        C source code (file name extension) [C]
CA        Certification Authority + Collision Avoidance
CAB   Compressed Application Binary [Microsoft]
.CAB      Cabinet (file name extension) [Microsoft]
CACLS   Command-Line Access Control Lists [Microsoft]
CAD       Computer Aided Design
CADD      Computer Aided Design and Drafting
CADE      Client/server Application Development Environment
CAE       Client Application Enabler + Common Applications
          Environment + Computer Aided Engineering
CAEN      Chemically Assembled Electronic Nanocomputer
CAEX      Computer Aided Exploration
CAG       Column Address Generator
CAI       Computer Aided Instruction
CAIRN     Collaborative Advanced Interagency Research Network
CAL       Calendar + Client Access License +
          Computer Aided Learning
CALS      Computer-Aided Acquisition in Logistic Support
CAM       Common Access Method + Computer Aided Manufacturing +
          Contents Addressable Memory
CAN       Cancel + Controller Area Network
CANBUS    Conroller Area Network Bus
CAP       Carrierless Amplitude and Phase-Modulation +
          Central Arbitration Point +
          Communication Application Platform +
          Competitive Access Provider +
          Computer Aided Publishing
.CAP      Capture (file name extension)
CAPD      Computing To Assist Persons With Disabilities [Johns
          Hopkins University]
CAPE      Concurrent Art-to-Product Environment
CAPS      Capitals (Upper Case Letters) +
          Cassette Programming System
CAR   Committed Access Rate [Cisco]
CARL      Colorado Alliance of Research Libraries [Internet]
CART   Computer-Assisted Radar Tomography
CAS       Column Address Select/Strobe +
          Communications Application Specification +
          Computer Aided Styling
CASE      Computer Aided Software Engineering
CASL      Crosstalk Application Scripting Language [DCA]
CASS      Computer Assisted Search Service
CASSIS    Classified and Search Support Information System
CAT       Computer Adaptive Test + Computer Aided Testing +
          Computer Aided Tomography +
          Computer Aided Transcription + Concatenate
.CAT      Catalog (file name extension)
CATS      Computer Assisted Training System
CAT SCAN  Computerized Axial Tomography Scan
CATV      Community Antenna Television (this was the original
          name for what is now known as Cable TV)
CAU       Controlled Access Unit
CAV       Constant Angular Velocity
CAVE      Computer Automatic Virtual Environment
CBC       Cipher Block Chaining
CBCR      Channel Byte Count Register
CBDS      Connectionless Broadband Data Service
CBEMA     Computer and Business Equipment
          Manufacturers Association
CBGA      Ceramic Ball Grid Array
CBI       Computer Based Instruction\Instrumentation
CBL       Computer Based Learning
.CBL      COBOL source code (file name extension)
CBMS      Computer-Based Mail System
CBN   Community Based Networks
CBR       Case Based Reasoning + Constant Bit Rate
CBT       Computer Based Training
CBW       Convert Byte to Word
CBX       Computer-Controlled Branch Exchange
CC        Cluster Controller
CC:       Carbon Copy
CCD       Charged-Coupled Device
CCFT      Cold Cathode Fluorescent Tube
CCI       Common Client Interface
CCIE      Cisco Certified Internetwork Expert [Cisco]
CCITT     Comite Consultatif International Telegraphique et
          Telephonique/ Consultative Committee for International
          Telegraph and Telephone
CCL       Connection/Cursor Control Language
CCM       Corba Component Mode
CCNA   Cisco Certified Network Associate
CCNP   Cisco Certified Network Professional
CCP       Certified Computing Professional +
          Console Command Processor
CC/PP   Composite Capabilities/Preference Profile
CCS       Common Command Set + Common Communications Services +
          Common Communications Support +
          Continuous Composite Servo + Cryptographic Checksum
.CCS      Color Calibration System (file name extension)
CCSD      Cellular Circuit-Switched Data
CCTLD   Country Code Top-Level Domain
CD        Carrier Detect + Change Directory +
          Collision Detection + Color Display + Compact Disk
C/D       Control Data
C2D       Character To Decimal [REXX]
CDA       Compound Document Architecture [DEC]
.CDA      CD Audio-Track (file name extension)
CDBT      Compact Disk-Based Training
CDC       Connected Device Configuration +
          Control Data Corporation
CD_CHRDY  Card Channel Ready [IBM]
CD-DA     Compact Disk - Digital Audio
CDDI      Copper Distributed Data Interface
CDE       Common Desktop Environment + Complex Data Entry
CD-E      Compact Disk - Erasable
CDF       Channel Definition Format
.CDF      Comma Delimited Format (file name extension)
CDFS      Compact Disc File System [Microsoft]
CD+G      Compact Disk plus Graphics
CD-I      Compact Disk - Interactive
CDIA      Certified Document Imaging Architect
CDL       Computer Design Language
CDMA      Code Division Multiple Access
CDMF      Commercial Data Masking Facility [IBM]
CD-MO     Compact Disk - Magneto Optical
CDO   Collaboration Data Objects [Microsoft]
CDOS      Concurrent Disk Operating System
CDP     * Certificate In Data Processing (First certification
          for Computer Professionals)
CDPD      Cellular Digital Packet Data
CDR       Call Detail Record + Call Detail Recording +
          Common Data Representation
.CDR   CorelDRAW (file name extension) [Corel]
CD-R      Compact Disk - Recordable
CD-RAM    Cached RAM
CD-RDx    Compact Disk - Read Only Memory Data Exchange Standard
CDRL      Contract Data Requirements List
CD-ROM    Compact Disk - Read Only Memory
CD-ROM-XA CD-ROM Extended Architecture
CD-RTOS   Compact Disk - Real Time Operating System
CD-RW     Compact Disk - Rewritable
CDS       Current Directory Structure
CDSA      Common Data Security Architecture
CDSL      (See DSL)
.CDT      Corel Draw Template (file name extension)
CD-V      Compact Disk - Video
CD-WO     Compact Disk - Write Once
.CDX      Compound Index (file name extension) [Fox Pro]
CD-XA     Compact Disk - Extended Architecture
CE        Cache Enable + Chip Enable + Collision Elimination +
          Convert Enable
CEC   Certified E-Commerce Consultant
CEG       Continuous Edge Graphics
CEI       Conducted Electromagnetic Interference
CELP      Card Edge Low Profile (socket) [Intel]
CEMS      Constituent Electronic Mail System
CEOP      Conditional End Of Page
CER       Canonical Encoding Rules
CERN      The European Particle Physics Laboratory (initials
          originally from Conseil Europien pour la Recherche
          Nucliaire)
CERT      Computer Emergency Response Team
CFB       Cipher Feedback + Configurable Function Block
.CFG      Configuration (file name extension)
CFM       Code Fragment Manager [Macintosh] +
          Cubic Feet Per Minute
CFML      ColdFusion Markup Language
CFR       Computerized Facial Recognition
CFS       Caching/Common File System
CFV       Call For Votes [Bitnet]
CG        Control Gate
CGA       Color Graphics Adapter
CGE       Common Graphics Environment
CGI       Computer Generated Images + Computer Graphics Interface
CGI-BIN   Common Gateway Interface - Binary
.CGM      Computer Graphics Metafile (file name extension) +
          Graph (file name extension) [Lotus 1-2-3] [LDC]
CGS       Continuous-Grain Silicon
CHAP      Challenge-Handshake Authentication Protocol
CHAR      Character
CHAT      Conversational Hypertext Access Technology [Internet]
CHCK      Channel Check
CHCP      Change Code Page
CHDIR     Change Directory
CHFN      Change Finger [Unix]
CHGRP     Change Group
CHIPS     Clearinghouse Interbank Payments System
.CHK      CHKDSK (file name extension)
CHKDSK    Check Disk
CHMOD     Change Mode
CHOWN     Change Owner
CHP       Chapter
CHR       Character
CHRP      Common Hardware Reference Platform
CHS       Cylinders, Heads, Sectors
CHTML     Compressed HTML
CI        Component Interface
CIA       Current Instruction Address
CIAC      Computer Incident Advisory Capability
CICS/VS   Customer Information Control System/
          Virtual Storage [IBM]
CID       Charge-Injection Device +
          Configuration/Installation/Distribution
CIDR      Classless Inter-Domain Routing
CIF       Common Interchange/Intermediate Format +
          Crystallographic Information File +
          Customer Information Feed
CIFS      Common Internet File System
CIL   Common Intermediate Language [ECMA]
CIM       Common Information Model +
          CompuServe Information Manager +
          Computer Integrated Manufacturing
CIO       Chief Information Officer
CIOCS     Communication Input/Output Control System
CIP       Command Interface Port + Common Indexing Protocol
CIR       Committed Information Rate
CIRC      Circular Reference +
          Cross-Interleaved Reed-Solomon Code
CIS       Card Information Structure + Client Information System +
          CompuServe Information Service +
          Computer Information Systems + Contact Image Sensor +
          Customer Information System
CISC      Complex Instruction Set Computing
CIT       Computer-Integrated Telephony
CIVR      Computer and Interactive Voice Response
CIW   Certified Internet Webmaster
CIX       Commercial Internet Exchange +
          Compulink Information Exchange
CJLI      Command Job Language Interpreter
CKD       Count Key Data (device)
CLAR      Channel Local Address Register
CLASS     Client Access to Systems and Services +
          Cooperative Library Agency for Systems and Services +
          Custom Local-Area Signaling Services
CLC       Clear Carry Flag
CLD       Clear Direction Flag
CLDC   Connected Limited Device Configuration
CLEC      Competitive Local Exchange Carrier
CLI       Call-Level Interface + Clear Interrupt Flag +
          Client Library Interface + Command Line Interface +
   Common Language Infrastructure/Interface
CLIB      C Library
CLID      Calling Line Identification
CLIST     Command List
CLK       Clock
CLNP      Connectionless Network Protocol
CLOS      Common Lisp Object System
CLP       Cell Loss Priority + Constraint Logic Programming
.CLP      Clipboard (file name extension) [Microsoft]
CLR   Common Language Runtime [Microsoft]
CLS       Clear Screen + Common Language Support
CLSID     Class Identifier
CLTP      Connectionless Transport Protocol
CLTS      Clear Task Switch Flag
CLTV      Constant Linear Time Velocity
CLUI      Command Line User Interface
CLUT      Color Look-Up Table
CLV       Constant Linear Velocity
CM        Centimeter + Control Mark + Corrective Maintenance
CMA       Concert Multi-thread Architecture
CMC       Common Mail Calls + Common Messaging Calls +
          Communication Management Configuration +
          Complement Carry Flag +
          Computer-Mediated Communication [Internet]
CMD       Circuit Mode Data
.CMD      Command (file name extension)
CMF       Creative Music Format
CNIDR     Clearinghouse for Network Information and
          Discovery and Retrieval [Internet]
CMIP      Common Management Information Protocol
CMIS      Common Management Information Services/System
CML       Chemical Markup Language + Conceptual Modelling Language +
          Computer Managed Learning + Current Mode Logic
CMM       Capability Maturity Model
CMMS      Computerized Maintenance Management Software
CMMU      Cache/Memory Management Unit [Motorola]
CMOS   Coats-Mellon Operational Specification +
          Complementary Metal-Oxide Semiconductor
CMOV      Conditional Move
CMP       Compare + Computer
CMPS      Compare Word String
CMS       Call Management Server + Code Management System +
          Compiler Monitor System + Conversation Monitor System
CMTS   Cable Modem Termination System
CMVC      Configuration Management Version Control [IBM]
CMW       Compartmented Mode Workstation
CMY       Cyan-Magenta-Yellow (color model)
CMYK      Cyan-Magenta-Yellow-Black (color model)
CNA       Certified NetWare/Network Administrator
CNAPS     Co-Processing Node Architecture for Parallel Systems
CNC       Computerized Numerical Control
CNE       Certified NetWare Engineer
.CNF      Configuration (file name extension)
CNG       Calling (tone)
CNI       Certified Novell Instructor [Novell]
CNIDR     Clearinghouse for Networked Information and
   Discovery and Retrieval [Internet]
CNN       Composite Network Node
CNR       Carrier to Noise Ratio + Communication Network Riser
CNSS      Core Nodal Switching Subsystem [Internet]
.CNT      Contents (file name extension)
CNV       Conventional (pertaining to Memory)
CNVT      Convert
CNX       Certified Network Expert
CO        Central Office + Command Output + Convert Out
COAST     Card On A Stick (module)
COAX      Coaxial Cable
COB       Chip-On-Board
.COB      COBOL source code (file name extension)
COBOL     Common Business-oriented Language (See HLL)
.COD      Code List (file name extension)
CODASYL * Conference on Data System Languages (Group that
          designed COBOL)
CODE      Client-Server Open Development Environment
CODEC     Coder/Decoder + Compression/Decompression
COEM      Commercial Original Equipment Manufacturer
COFF      Common Object File Format [Unix]
COGO      Coordinate Geometry (Programming Language)
COL       Collision + Computer Oriented Language
COLD      Computer Output to Laser Disk
COLL      Collision
COM       Component Object Model [Microsoft] +
          Computer Output Microfilm
.COM      Command (file name extension) +
          Commercial Business (Domain Name) [Internet]
COM1      First serial Port (asynchronous port)
COM2      Second serial Port
COM3      Third serial Port
COM4      Fourth serial Port
COMDEX    Computer Dealers Exposition
COMET     Cornell Macintosh Terminal Emulator
COMM      Communications
COMP      Compare
COMP.     Computers [USENET Newsgroup Category]
COMSAT    Communications Satellite Corporation
CON       Console (includes Keyboard and Screen)
COND      Condition
CONFIG    Configuration
CONS      Connection-Oriented Network Service
CONTONE   Continuous Tone
.COOP   Cooperatives-Business (Domain Name) [Internet]
COPICS    Communications Oriented Production Information
          and Control System [IBM]
COR       Common Object Runtime
CORBA     Common Object Request Broker Architecture
COREN     Corporation for Research and Enterprise Network
COS       Compatible Operating System
COSE      Combined Office Standard Environment +
          Common Open Software/Systems Environment
COSMIC    Computer Software Management and Information
          Center [NASA]
COSMOS    Computer System for Mainframe Operations
COSS      Common Object Services Specification
COTS      Commercial Off-The-Shelf (software)
COURRIEL  Courrier Electronique (Electronic Mail)(email)
CP        Copy Protected
CPA       Certified Public Accountant + Cost Per Action
CPAN   Comprehensive Perl Archive Network
CPC       Constant Point Calculation + Cost Per Click
CPCS      Check Processing Control System [IBM]
CPE       Central Processing Element +
          Customer Premises Equipment +
          Customer Provided Equipment
.CPE      Cover Page (file name extension)
CPFR   Collaborative Planning, Forecasting and Replenishment
CPG       Clock Pulse Generator
CPI       Characters Per Inch + Clock Per Instruction +
          Common Programming Interface [IBM]
.CPI      Code Page Information (file name extension) [MS-DOS]
CPI-C     Common Programming Interface for Communications [IBM]
CPIO      Copy In and Out [Unix]
CPL       Current Privilege Level
.CPL      Control Panel (file name extension)
CPLD      Complex Programmable Logic Device
CPM       Critical Path Method
CP/M      Control Program for Microcomputers [Digital Research]
CPO   Chief Privacy Officer
CPRM   Content Protection for Recordable Media
CPS       Characters Per Second + Cycles Per Second
CPT       Command Pass Through
CPU       Central Processing Unit
CPW       Commercial Processing Workload [IBM]
CR        Carriage Return
CRAM   Challenge-Response Authentication Mechanism +
          Cyberspatial Reality Advancement Movement
CRAYON    Create Your Own Newspaper
CRC       Cyclic Redundancy Check
.CRD      Cardfile (file name extension) +
          Chord (music file name extension)
CREN      Computer Research Education Network +
          Corporation for Research and Education Networking
CRF       Cable Retransmission Facility + Cross Reference File
CRI       Color Reproduction Indices
CRL   Certificate Revocation List
CR/LF     Carriage Return/Line Feed
CRM       Customer Relationship Management
CROM      Control Read Only Memory
CRT       Cathode Ray Tube
CRTC      CRT Controller
CRUD      Create, Retrieve, Update, Delete
CS        Chip Select + Clear to Send + Code Segment
C/S       Client/Server
CSA       Calendaring and Scheduling API [IBM]
CSAR      Channel System Address Register
CSCW      Computer Supported Cooperative Work
CSD       Circuit-Switched Data +
          Computer Services Department +
          Corrective Service Diskette [IBM]
CSDS      Circuit Switched Data Service
CSE       Certified System Engineer
CSFI      Communication Subsystem For Interconnection
CSG       Constructive Solid Geometry +
          Consulting Services Group [Lotus]
CSI       Command Sequence Introducer + CompuServe Incorporated
CSID      Call Subscriber Identification
CSL       Computer Sensitive Language
CSLIP     Compressed Serial Line Interface Protocol [Internet]
CSM       Code Set Map (file) + Communications Services Manager +
          Control Strip Module [Macintosh]
CSMA/CA   Carrier Sense Multiple Access/with Collision Avoidance
CSMA/CD   Carrier Sense Multiple Access/with Collision Detection
CSMS      Customer Support Management System
CSN       Card-Select Number
CSNET     Computer Science Network
CSO       Central Services Organization
CSP       Certified Systems Professional +
          Chip-Scale Packaging +
          Commercial Service Provider +
   Commercial Subroutine Package +
          CompuCom Speed Protocol [CompuCom] +
          Communicating Sequential Processes +
          Cross System Product [IBM]
CSPDN     Circuit Switched Public Data Network
CSRAM     Custom Static RAM
CSS     * Continuous System Simulator (Language)
CSS       Cascading Style Sheet [Microsoft] +
          Contact Start-Stop + Content Scrambling System
CSSM      Client-Server Systems Management [IBM]
CS/SS     Card Service/Socket Service
CSTA      Computer-Supported Telephony Applications
CSU       Channel Service/Switching Unit
CSV       Circuit-Switched Voice +
          Comma-Separated Value/Variable +
          Common Services Verbs (interface) [Microsoft]
C2T   Cable Changing Technology
C&T       Chips and Technologies
CTB       Cipher Type Byte
CTC       Channel To Channel + Counter/Timer Chip
CTCP      Client-To-Client Protocol
CTI       Computer-Telephony Integration
CTL   Complex Text Layout
CTOS   Cassette Tape Operating System +
          Computerized Tomography Operating System +
          Convergent Technologies Operating System
CTPA      Coax-to-Twisted-Pair Adapter
CTRCO   * Calculating,Tabulating,Recording Company (The name of
          this company was changed to "International Business
          Machines" by Thomas J. Watson, Sr.)
CTRL      Control
CTS       Clear To Send + Computer Telephony Solution [IBM] +
          Customer Telephone System
CTSS    * Compatible Time Sharing System
CUA       Common User Access [IBM]
CUB       Cursor Backward
CUD       Cursor Down
CUE       Custom Updates and Extras (card) [Egghead Software]
CUF       Cursor Forward
CUI       Character-Oriented User Interface +
          Common User Interface [IBM]
CUP       Cursor Position
CUPID     Completely Universal Processor I/O Design [AST]
.CUR      Cursor (file name extension)
CUSIP     Committee for Uniform Security Identification
          Procedures [U.S. Treasury]
CUT       Control Unit Terminal
CUTE      Clarkston University Terminal Emulator
CUU       Cursor Up
CVF       Compressed Volume File
CVGA      Color Video Graphics Array
CVIA      Computer Virus Industry Association
CVS   Concurrent Versions System
CVT       Convert
CVW       CodeView for Windows
CWA   Competitive Web Analysis
CWD       Convert Word to Double Word +
          Change Working Directory [Internet]
CWIS      Campus Wide Information Service/System [Internet] +
          Community Wide Information Service/System [Internet]
C2X       Character To Hexadecimal [REXX]
CXML   Commerce Extensible Markup Language
CYL       Cylinder
CYMK      Cyan-Yellow-Magenta-Black (color model)
 

D...

D/A       Digital to Analog
DAA       Data Access Arrangement +
          Decimal Adjust for Addition +
   Digest Access Authentication
DAB       Digital Audio Broadcasting
DAC       Data Acquisition and Control + Device Access Code +
          Digital to Analog Converter +
          Dual Attachment Concentrator
DACL      Discretionary Access Control List
DAD       Desktop Application Director [Borland]
DAE       Digital Audio Extraction
DAI       Distributed Artificial Intelligence
DAL       Data Access Language [Apple Computer] +
          Data Access Layer + Disk Access Lockout
DAM       Data Acquisition and Monitoring
DAMPS     Digital AMPS
DAO       Data Access Object [Microsoft] + Disk At Once
DAP       Data Access Protocol [DEC] +
          Developer Assistance Program
   Dynamic Application Partitioning [IBM]
DAPIE     Developers Application Programming Interface Extensions
DARI      Database Application Remote Interface [IBM]
DARMS     Digital Alternate Realization of Musical Symbols
DART      Digital Audio Reconstruction Technology
DAS       Decimal Adjust for Subtraction +
          Dual-Attached Station
DASD      Direct Access Storage Device [IBM]
DAT       Digital Audio Tape + Disk Array Technology
.DAT      Data (file name extension)
DATACOM   Data Communications
DAV       Digital Audio-Video +
   Distributed Authoring and Versioning
DAVIC     Digital Audio-Visual Council
dB        Decibel
DB        Data Base + Data Buffer + Device Bay
dBA       Adjusted Decibel
.dba   Date Book Archive (file name extension) [Palm]
DBC       Device Bay Controller
DBCS      Delivery Bar Code Sorter + Double-Byte Character Set
.DBF      Database Format (file name extension)
DBIS      Dun & Bradstreet Information Services
.DBK   Docbook (format) (file name extension)
dBm   Decibels to a Milliwatt
DBM       Data Base Manager
DBMS      Data Base Management System
DBR       DOS Boot Record
DBS       Data Base Server +
          Direct (to home) Broadcast (satellite) System
DBV       Digital Broadcast Video
DBWR   Database Writer [Oracle]
DB2       Database 2
DC        Data Collection + Data Communication + Data Control +
          Device Control + Direct Current
D2C       Decimal To Character [REXX]
DCA       Digital Communications Associates +
          Document Content Architecture [IBM]
DCAF      Distributed Console Access Facility [IBM]
DCAM      Digital Camera + Direct Chip Attach Module
DCB       Device Control Block + Disk Coprocessor Board [Novell]
DCC       Data Country Code + Digital Command Control +
          Digital Compact Cassette + Direct Cable/Client Connection
          + Display Combination Code
DCD       Data Carrier Detect
DCE       Data Circuit-Terminating Equipment +
          Data Communications Equipment +
          Distributed Computing Environment [OSF] +
          Distributed Computing Equipment
DCED      Distributed Computing Environment Daemon
DCF       Data Communication Facility [IBM] +
          Data Compression Facility +
          Data Count Field [IBM] +
          Driver Configuration File [Lotus]
D-CHANNEL Data Channel
DCI       Display Control Interface
DCL       Data Control Language + Declaration +
          DEC Command Language [DEC] +
          Device Clear + Digital Control Logic +
          Digital Command Language [Digital]
DCML   Dynamic Configuration Markup Language
DCOM      Distributed Component Object Model
DCP   Device Control Protocol +
          Digital Light Processing [TI]
DCS       Data Collection System + Data Control System +
          Desktop Color Separation + Distributed Control System
DCT       Discrete Cosine Transform
.DCT      Dictionary (file name extension)
DCU       Data-Cache Unit
DD        Day + Digital Display + Double Density
DDA       Distributed Data Access + Domain-Defined Attribute
DDB       Device Dependent Bitmap + Device Descriptor Block
DDC       Digital Data Channel [VESA] + Display Data Channel
DDCMP     Digital Data Communications Message Protocol [DEC]
DDC1      Display Data Channel One
DDCS      Distributed Database Connection Services [IBM]
DDD       Direct Distance Dialing
DDE       Direct Data Entry + Dynamic Data Exchange [Microsoft]
DDEML     Dynamic Data Exchange Manager Library [Microsoft]
DDF       Display Data Channel + Dynamic Data Formatting [IBM]
DDI       Device Driver Interface +
          Digital Document Interchange + Direct Dial In
DDK       Device Driver Kit [Microsoft Windows]
DDL       Data Definition Language + Data Description Language
DDM       Distributed Data Management
DDN       Defense Data Network
DDNS      Dynamic Domain Naming System
DDOS   Distributed Denial Of Service
DDP       Datagram Delivery Protocol +
          Distributed Data Processing
DDR       Dynamic Document Review [Symantec]
DDR-SDRAM Double Data Rate-SDRAM
DDS       Data Description Specification +
          Digital Dataphone Service [AT&T] + Design Data Sheet +
          Digital Data Storage + Distributed Database Services
DDX       Digital Data Exchange
DE        Device End
DEA       Data Encryption Algorithm + Disposable Email Address
DEC       Decrement + Device Clear + Digital Equipment Corporation
DECNET    Digital Equipment Corporation Networking (protocol)
DEF       Desktop Functional Equivalent [Compaq]
.DEF      Definitions + Defaults (file name extensions)
DEFRAG    Defragment
DEK       Data Encryption Key
DEL       Delete
DELSTR    Delete String [REXX]
.DEM      Demonstration (file name extension)
DEN   Directory Enabled Network +
          Document Enabled Networking [Novell-Xerox]
DER       Distinguished Encoding Rules
DES       Data Encryption Standard + Data Entry Sheet
.DES      Description (file name extension)
DET       Device Execute Trigger
DEV       Device
DF        Data Field + Default + Destination Field +
          Device Flag + Double Flag
DFC       Data Flow Control
DFD   Data Flow Diagram
DFDR      Digital Flight Data Recorder
DFM       Design For Manufacturability [IBM]
DFP       Digital Flat Panel
DFS       Distributed File System
DFSMS     Data Facility Storage Management Subsystem [IBM]
DFT       Design For Testability + Diagnostic Function Test +
          Discrete Fourier Transform +
          Distributed Function Terminal
DFU       Data File Utility
DGIS      Direct Graphics Interface Standard
DHCP      Dynamic Host Configuration Protocol
DHL       Dynamic Head Loading
.DHP      Dr. Halo PIC (file name extension)
DHTML     Dynamic HTML
DI        Data In + Destination Index
DIA       Document Interchange Architecture [IBM]
DIB       Device Independent Bitmap +
          Directory Information Base +
          Dual Independent Bus [Intel]
DIBOL     DEC Business Oriented Language
.DIC      Dictionary (file name extension)
DICOM   Digital Imaging and Communications in Medicine
DID       Direct Inward Dialing
DIDS      Distributed Intrusion Detection System
DIF       Data Interchange Format
DIFFSENS  Differential Sense
DIIP      Direct Interrupt Identification Port
DIME   Direct Internet Message Encapsulation
DIMM      Dual In-Line Memory Module
DIN       Deutsche Industrie Norm (German equivalent of EIA)
DIO       Data Input-Output
DIP       Dialup Internet Protocol [Internet] +
          Digital Imaging Processing +
          Dual In-line Package + Dual In-line Pin
DIR       Directory (file)
DIS       Draft International Standard +
          Dynamic Impedance Stabilization [CompuCom]
DISA      Data Interchange Standards Association +
          Direct Inward System Access
DISP      Displacement (offset)
DIT       Directory Information Tree
DIV       Divide
DIVE      Direct Interface Video Extension [OS/2 Warp]
DIVX      Digital Video Express
DIW       D-Inside Wire [AT&T]
DIX   Digital-Intel-Xerox (Original Ethernet Standard)
.DIZ      Description In Zip (file name extension)
DL        Download (also D/L)
DL/1      Data Manipulation Language 1 [IBM]
DLB       Dynamic Load Balancing
DLC       Data Link Control (protocol) [IBM] +
          Distributed Loop Carrier
DLCI      Data Link Connection Identifier
DLD       Display List Driver
DLE       Data Link Escape
DLL       Dynamic Link Library
DLM       Distributed Lock Manager + Dynamic Link Module
DLP       Digital Light Processing [TI]
DLPI    Data Link Provider Interface
DLR       DOS LAN Requester
DLS       Data Link Switching [IBM]
DLT       Digital Linear Tape
DM        Distributed Memory
DMA       Direct Memory Access/Addressing +
          Document Management Alliance
DMAC      DMA Controller
DMACS     Distributed Manufacturing Automation & Control Software
DMD       Digital Micromirror Device [TI]
DME       Direct Memory Execution +
          Distributed Management Environment
DMF       Distribution Media Format [Microsoft]
DMI       Desktop Management Interface
DML       Data Manipulation Language +
   Dialog Markup Language [W3C]
DMM       Digital Multimeter
DMMS      Dynamic Memory Management System
DMOS      Double-diffused Metal-Oxide Semiconductor
DMP       Dot Matrix Printer
DMPC      Distributed Memory Parallel Computer
DMPP      Distributed Memory Parallel Processor
DMQS      Display Mode Query and Set [IBM]
DMS       Data Management Software + Data/Document
          Management System
DMSD      Digital Multistandard Decoding
DMSDK   Digital Media Software Development Kit [SGI]
DMSS      Distributed Mass Storage System
DMT       Digital/Discrete Multi-Tone
DMTF      Desktop Management Task Force
DMY       Day Month Year
DN        Down
DNA   Deoxyribonucleic Acid
DNC       Direct Numerical Control
DNIC      Data Network Identification Code
DNIS      Dialed Number Identification Service
DNS       Domain Naming System
DO        Data Out + Distributed Objects
DOA   Dead On Arrival
.DOC      Document + Documentation (file name extensions)
DOCSIS   Data Over Cable-Service Interface Specification
DOCSV     Data Over Circuit-Switched Voice
DOE       Distributed Objects Environment/Everywhere
DOIP      Dial Other Internet Providers [IBM]
DO-IT     Disabilities, Opportunities, Internetworking and
          Technology
DOLAP   Desktop OLAP
DOM       Document Object Model [W3C]
DOMF      Distributed Object Management Facility
DOS       Denial Of Service + Disk Operating System
DOSEM     DOS Emulation
.DOT   Document Template (file name extension)
DOV       Data Over Voice
DOW       Day Of Week
DP        Data Processing
DPA       Demand Protocol Architecture [3Com] +
          Document Printing Architecture
DPAM      Demand Priority Access Method
DPAREN    Data Parity Enable [IBM]
DPB       Drive Parameter Block
DPC       Direct Program Control
DPI       Distributed Protocol Interface + Dots Per Inch
DPL       Descriptor Privilege Level
DPM       Digital Panel Meter
DPMA      Data Processing Management Association
DPMI      DOS Protected Mode Interface [Microsoft]
DPMS   Digital Power Management Signaling +
          Display Power Management Support
DPO       Data Phase Optimization
DPS       Document Processing System
DPSK      Differential Phase Shift Keying
DPtoTP    Display Coordinates to Tablet Coordinates
          (converting)
DQDB      Distributed Queue Dual Bus
DQL       Data Query Language
DR        Data Received
D/R       Direct or Reverse
DRAM      Dynamic Random Access Memory
DRAW      Direct Read After Write
DR.BOND   Dial-up Router Bandwidth On Demand [NEC]
DRDA      Distributed Relational Database
   Algorithm/Architecture [IBM]
DR-DOS    Digital Research-Disk Operating System
DRDW      Direct Read During Write
DRI       Declarative Referential Integrity +
          Digital Research Incorporated
DRM       Digital Rights/Distributed Resource Management
DRO       Data Request Output + Destructive Read-Out
DRS       Document Registration System
.DRS      Driver Resource (file name extension) [WordPerfect]
DRV       Drive
.DRV      Device Driver (file name extension) (Also see .DVR)
.DRW      Draw + Drawing (file name extensions)
DS        Data Segment + Data Send + Data Server + Double Sided
D/S       Dhrystone Per Second
DS3   Digital Signal Level 3
DSA       Digital Signature Algorithm + Directory System Agent
DSAP      Destination Service Access Point
DSD       Direct Stream Digital [Sony-Philips]
DSDD      Double Sided, Double Density (diskette)
DSE       Data Storage Equipment
DSEA      Display Station Emulation Adapter
DSECT     Dummy Control Section
DSHD      Double Sided, High Density (diskette)
DSIG   Digital Signature
DSIS      Distributed Support Information Standard
DSL       Digital Subscriber Line
  ADSL Asymmetric DSL
  BDSL Broadband DSL
  CDSL Consumer DSL [Rockwell]
  FDSL Fixed Directory Subscriber List
  HDSL High-Bit-Rate DSL +
   High-Data-Rate DSL
  IDSL Integrated Services Digital Network DSL
  RDSL Rate-Adaptive DSL
  SDSL Single-Line DSL +
   Symmetric DSL
  VDSL Very-High-Bit-Rate DSL
  VADSL Very-High-Rate Asymmetric DSL
  VDSL Very-High-Data-Rate DSL
DSL       Dynamic Simulation Language
DSLAM     Digital Subscriber Line Access Multiplexer
DSM       Distributed Shared Memory +
   Domain-Specific Modeling
DSMA      Digital Sense Multiple Access
DSML   Directory Services Markup Language
DSN       Data Source Name + Delivery Service Notification
DSO   Dynamic Shared Object
DSOM      Distributed System Object Model
DSP   Delivery Service Partner +
          Digital Signal Processing/Processor +
   Digital Sound Processor +
          Directory Synchronization Protocol [Lotus]
DSPT      Display Station Pass-Thru [IBM]
DSQD      Double Sided, Quad Density (diskette)
DSR       Data Set Ready + Device Status Register +
          Device Status Report
DSS       Decision Support System + Digital Signature Standard +
          Direct-Sequence Spread Spectrum +
          Direct Station Selector
DSSI      Digital Standard Systems Interconnect [DEC]
DSSS      Direct-Sequencing Spread Spectrum
DSSSL     Document Style Semantics and Specifications Language
DSTN      Double Supertwisted Nematic
DSU       Data Service/Switching Unit + Digital Service Unit
DSVD      Digital Simultaneous Voice and Data
DSW       Data Status Word + Device Status Word
DSX       Digital Signals Cross-Connect
D2T2      Dye Diffusion Thermal Transfer (printing)
DTA       Disk Transfer Area
.DTA      Data (file name extension)
DTC       Desktop Conferencing
DTCP   Digital Transmission Copy Protection
   [Hitachi, Intel, Panasonic, Sony, Toshiba]
DTD       Document Type Definition
DTE       Data Terminal Equipment + Dumb Terminal Emulator
DTF       Distributed Test Facility
DTL       Dialogue Tag Language [IBM] + Diode-Transistor Logic
DTM       Digital Terrain Mapping
DTMF      Data Tone Multiple Frequency + Dual Tone Multifrequency
DTP       Desktop Publishing + Distributed Transaction Process
DTR       Data Terminal Ready + Data Transfer Rate
DTS   Distributed Traffic Shaping [Cisco]
DTSS      Dartmouth Time Sharing System
DTV       Desktop Video + Digital Television
DTVC      Desktop Video Conferencing
DU        Disk Usage
DUA       Directory User Agent
DUAT      Direct User Access Terminal
DUN       Dial-Up Networking [Microsoft]
DUNCE     Dial Up Network Connection Enhancement
DV        Digital Video
.DV       DESQview Script (file name extension)
DVC       Desktop Video Conferencing + Digital Video Camera
DVD       Digital Video Disk
DVD-A   Digital Video Disk-Audio
DVD-R     Digital Video Disk-Recordable
DVD-RAM   Digital Versatile Disc-RAM
DVD-ROM   Digital Versatile Disc-ROM
DVE       Digital Video Effect
DVI       Digital Video Interactive + Digital Visual Interface
.DVI      Device Independent (file name extension)
DVM       Digital Volt Meter
DVMRP     Distance Vector Multicast Routing Protocol [Internet]
DVOF   Digital Video Over Fiber
DVR       Digital Video/Voice Recorder
.DVR      Device Driver (file name extension) (Also see .DRV)
DW        Data Warehousing
DWDM      Dense Wavelength Division Multiplexer
DWG       Drawing
DWMT      Discrete Wavelet Multitone
DWT   Discrete Wavelet Transform
D2X       Decimal To Hexadecimal [REXX]
.DXB      Drawing Interchange Binary (file name extension)
          [AutoCAD]
DXC       Data Exchange Control
DXF       Data Exchange File + Drawing Exchange Format
DXI       Data Exchange Interface
DYNSLT   Dynamic Select [IBM]
DYNSRC    Dynamic Source
 

E...

EA        Effective Address + Extended Attribute [OS/2]
EAI   Enterprise Application Integration
EAP   Extensible Authentification Protocol
EAR       External Access Register
EARN      European Academic Research Network
EAROM     Electrically Alterable Read Only Memory
EARS      Electronic Access to Reference Services +
          Electronic Authoring and Routing System [DEC] +
          Explicit Archive and Retrieval System [Langley Research]
EATA      Enhanced AT Bus Attachment
EAX       Environmental Audio Extensions [Creative]
EB        Exabyte (1,024 petabytes)
          (One Billion Billion characters of information)
EBASIC   Extended BASIC
EBC       EISA Bus Controller
EBCT      Electron Beam Computed Tomography
EBCDIC    Extended Binary Coded Decimal Interchange Code [IBM]
EBI       Equivalent Background Input +
          Extended Background Investigation
EBNF      Extended Backus-Naur Form
EBOOK   Electronic Book
EBPP   Electric Bill Presentment and Payment
EBT       Electronic Benefits Transfer
EC        Electronic Commerce + Error Control
ECAL      Enjoy Computing And Learn
ECAT      Electronic Card Assembly and Test [IBM]
ECB       Electronic Codebook + Event Control Block
ECC       Elliptic Curve Crypto + Error Check Code +
          Error Checking and Correction + Error Correction Code
ECD       Enhanced Color Display + Enhanced Compact Disk
ECHO      European Commission Host Organization [Internet]
ECI       External Call Interface
ECL       Emitter Coupled Logic
ECM       Electronic Control Module
ECMA      European Computer Manufacturers Association
ECN   Electronic Communications Network
ECNE      Enterprise Certified NetWare Engineer [Novell]
ECP       Enhanced/Extended Capabilities Port [Microsoft]
ECS       Enhanced Chip Set
ECTL      Electronic Communal Temporal Lobe
ECU       EISA Configuration Utility
ED        Erase Display
EDA       Electronic Design Automation +
          Embedded Document Architecture [Go Corporation]
EDB       Embedded Database
EDC       Electronic Digital Computer +
          Enhanced Data Correction +
          Error Detection and Correction
EDDC      Extended Distance Data Cable
EDE       Encrypt-Decrypt-Encrypt
EDGAR     Electronic Data Gathering, Analysis and Retrieval
EDGE   Enhanced Data-Rates for Global Evolution
EDI       Electronic Data Interchange +
          Electronic Document Interchange [DEC]
EDIF      Electronic Design Interchange Format
EDIFACT   EDI for Administration Commerce and Transport
EDL       Edit Decision List
EDLC      Ethernet Data Link Control
EDLIN     Editor (Line Text)
EDMS      Electronic Document Management System
EDO       Extended Data Out
EDOS      Enhanced DOS for Windows
EDP       Electronic Data Processing
EDPM      Electronic Data Processing Machine
EDRAM     Enhanced/Eraseable/Extended Dynamic Random Access Memory
EDS       Electronic Data Systems (corporation)
EDSAC   * Electronic Delay Storage Automatic Computer
.EDU      Educational Institutions (Domain Name) [Internet]
EDVAC   * Electronic Discrete Variable Automatic Computer
          (First stored-program digital computer)
EE        Extended Edition [IBM]
EEC       Extended Error Correction
EEG       Electroencephalogram
EEL       Epsilon Extension Language
EEM       Extended Memory Management
EEMAC     Electrical & Electronic Manufacturers of Canada
EEMS      Enhanced Expanded Memory Specification
EEPROM    Electrically Erasable Programmable Read-Only Memory
EES       Escrow Encryption Standard
EFA       Extended File Attribute
EFF       Electronic Frontier Foundation
EFI       Electromechanical Frequency Interference +
          Electronics For Imaging +
   Extensible Firmware Interface
EFIGS     English, French, Italian, German, Spanish
EFL       Emitter Follower Logic
E-FORM    Electronic Form
EFS       Encrypting File System
EFTS      Electronic Funds Transfer System
EGA       Enhanced Graphics Adapter
EGP       Exterior Gateway Protocol
EGREP     Extended Global Regular Expression Print [Unix]
EHCI   Enhanced Host Controller Interface
EHLLAPI   Emulator High Level Language Application
          Programming Interface [IBM]
EIA       Electronic Industries Association
EIDE      Enhanced Integrated Drive Electronics
EIM   Electronic Image Management
EIS       Executive Information System
EISA      Extended Industry Standard Architecture
EJB       Enterprise JavaBeans
EL        Electroluminescent (display) + Erase Line
ELAN      Emulated Local Area Network
ELC       Embedded Linking and Control
ELCPS   Embedded Linux Consortium Platform Specification
ELD   Electronic License Distribution
ELEC   Enterprise Local Exchange Carrier
ELF       Executable and Linking Format +
          Extremely Low Frequency
ELS       Entry Level System
EM        Electronic Mail + Emphasized + End of Medium +
          Expanded Memory
EMA       Electronic Mail Association +
          Enterprise Management/Memory Architecture
EMACS     Editing Macros [Unix]
E-MAIL    Electronic Mail
EMB       Extended Memory Block [LIM/AST]
EMBARC    Electronic Mail Broadcast to a Roaming Computer
          [Motorola]
EMC       Electromagnetic Compatibility + Enhanced Memory Chip +
          E-Mail Connection + Extended Math Coprocessor
EMCC    * Eckert-Mauchly Computer Company (World's first computer
          company, founded by Presper Eckart and John Mauchly,
          who invented and built the first UNIVAC)
EMF   Extended Metafile Format [Microsoft]
EMI       Electromagnetic Interference +
   Encryption Mode Indicator
.EML      Electronic Mail (file name extension)
EMM       Expanded Memory Manager
EMR       Electro-Magnetic Radiation +
          Enhanced Metafile Record
EMS       Electronic Mail System +
   Electronic Message Service +
   Energy Management System +
   Enhanced Messaging Service +
          Expanded Memory Specification [LIM]
EMSAPI    Extended Messaging Services Application
          Programming Interface
EMWAC     European Microsoft Windows NT Academic Centre
.ENC      Encoded (file name extension)
ENDEC     Encoder/Decoder
ENDS      Ends Segment
ENIAC   * Electronic Numerical Integrator Analyzer and
          Computer (First fully electronic digital computer)
ENQ       Enquiry
ENSS      Exterior Nodal Switching Subsystem [Internet]
EOA       End Of Address
EOB       End Of Block
EOC       End Of Conversion
EOF       End Of File + Enterprise Objects Framework
          [Next Computer]
EOI       End Of Interrupt + End Or Identify
EOJ       End Of Job
EOL       End Of Line + End Of List
EOM       End Of Message
EOR       Exclusive OR (Also XOR)
EOS       Earth Observing System [NASA] + End Of String +
   Error Correction Code on SIMM
EOSDIS    Earth Observing System Data and Information System [NASA]
EOT       End Of Table + End Of Tape (marker) + End Of Text +
          End Of Transmission
EP        Electrophotographic Engine
EPIC      Explicitly Parallel Instruction Computing (chip) [Intel]
EPL       Effective Privilege Level
EPLD      Electrically Programmable Logic Device
EPM       Enhanced Editor for Presentation Manager [IBM] +
          Enterprise Process Management [IBM]
EPP       Enhanced Parallel Port
EPROCESS  Executive Process
EPROM     Electrically Programmable Read Only Memory +
          Erasable Programmable Read Only Memory
.EPS      Encapsulated PostScript (file name extension)
EPSF      Encapsulated PostScript Files
ERA       Extended Registry Attributes
ERAS      Electronic Routing and Approval System [Hughes Aircraft]
ERD       Emergency Repair Disk + Entity Relationship Diagram
ERIC      Educational Resources Information Center [Internet]
ERLL      Enhanced Run Length Limited
ERMA    * Electronic Recording Method, Accounting
          [General Electric]
EROM      Erasable Read Only Memory
EROS      Earth Resources Observation System
          [U.S. Geological Survey]
ERP       Enterprise Resource Planning
ERR       Error
ER/RC     Extended Result/Response Code
ERU       Emergency Recovery Utility [Microsoft]
ES        Extra Segment
ESA       Enterprise Systems Architecture [IBM] +
          European Space Agency
ESC       EISA System Component + Escape
ESCD      Extended System Configuration Data
ESCM      Extended Services Communications Manager [IBM]
ESCON     Enterprise System Connection (Architecture) [IBM]
ESC/P     Epson Standard Code for Printers
ESD       Electronic Software Distribution +
          Electrostatic Discharge + Emergency Startup Disk
ESDI      Enhanced Small/System Device Interface
ESDRAM    Enhanced SDRAM
ESF       Extended Superframe
ESI       End System Identifier +
          Enhanced Serial Interface (specification) [Hayes]
ESMR      Enhanced Specialized Mobile Radio
ESN       Electronic Security/Serial Number
ESP       Emulation Sensing Processor +
          Encapsulating Security Payload (header) +
          Enhanced Serial Port [Hayes] + Enhanced Service Provider +
          Enterprise System Platcorm + Estimated Selling Price +
   Eudora Sharing Protocol [Qualcomm]
ESR       Event Service Routine
ESS       Electronic Switching System
ESU       Electro-Static Unit
ET        Enhanced Telephony [Microsoft] +
   Enhancement Technology
ETACS     Extended Total Access Communication System [IBM]
ETANN     Electrically Trainable Analog Neural
          Network (chip) [Intel]
ETB       End of Transmission Block
ETC       Electronic Toll Collection +
          Enhanced Throughput Cellular (modem protocol) [AT&T]
E-TEXT    Electronic Text
ETF       Enriched Text Format
ETOM      Electron-Trapping Optical Memory
ETPL      Endorsed Tempest Products List
ETS       Econometric Time Series
ETX       End Of Text
EU        Execution Unit
EUC       End User Computing + Extended Unix Code [IBM]
EUDORA    (Named after author of story:
          "Why I Live at the P.O.", Ms. Eudora Welty)
EUI       End-User Interface
EULA   End-User License Agreement
EUVL   Extreme Ultraviolet Lithography
EVE       Extensible VAX Editor
EVGA      Extended Video Graphics Array +
          Extended Video Graphics Adapter
EWAN      Emulator Without A Good Name [Internet]
EWS       Employee Written Software [IBM]
ExCA      Exchangeable Card Architecture [Intel]
.EXE      Executable (file name extension)
EXE2BIN   Program used to convert an (.EXE) file to binary
          format (.COM) file
EXIF   Exchangeable Image File Format
EXM       Enterprise Messaging Exchange [Lotus]
EXP       Exponent
EXT       External
EXTRN     External Reference
E-ZINE    Electronic Magazine
 

F...

FAB       Computer-Chip Fabrication Plant
FAC       File Access Code
FAMOS     Floating Gate Avalanche MOS
FANS      Future Air Navigation System
FAP       File Access Protocol
FAPI      Family Application Program Interface
FAQ       Frequently Asked Question
FARNET    Federation of American Research Networks [Internet]
FASIC     Function and Algorithm-Specific Integrated Circuit
FAT       File Allocation Table
FAX       Facsimile
.FAX      Fax (file name extension)
FBC   Find By Content
FC/AL     Fiber Channel/Arbitrated Loop
FCB       File Control Block
FCC       Federal Communications Commission
FCC:      File Carbon Copy
FCCSET    Federal Coordinating Council for
          Science, Engineering and Technology
FC/EL     Fiber Channel/Enhanced Loop
FCI       Flux Changes per Inch
FCL       Fibre Channel Loop
FCPGA   Flip Chip Pin Grid Array [Intel]
FCR       FIFO Control Register
FCRAM   Fast-Cycle RAM
FCS       Fiber Channel Standard + Frame Check Sequence
FD        Floppy Disk + Floppy Drive + Full Duplex
FDC       Floppy Disk Controller
FDDI      Fiber Digital Device Interface +
          Fiber Distributed Data Interface
FDHD      Floppy Drive High Density
FDISK     Fixed Disk
FDM       Frequency Division Multiplexing
FDMA      Frequency Division Multiple Access
FDSL   (See DSL)
FDX       Full Duplex
FEC       Forward Error Correction
FECN      Forward Explicit Congestion Notification
FED       Field Emission/Emitter Display
FEFO      First-Ended, First-Out
FEP       Front End Processor
FEPI      Front End Programming Interface
FEPROM    Flash EPROM
FERAM     Ferroelectric RAM
FESDK     Far East Software Development Kit [Microsoft]
FET       Field Effect Transistor
FF        Flip-Flop + Form Feed
FFDC      First Failure Data Capture [IBM]
FFS       Fast File System
FFST      First Failure Support Technology [IBM]
FFT       Fast Fourier Transform + Final Form Text [IBM]
FG        Floating Gate
FGREP     Fixed Global Regular Expression Print [Unix]
FHS       Fan Heat-Sink
FHSS      Frequency-Hopping Spread Spectrum
FIA   File Integrity Assessment
FIB   Forwarding Information Base
FIF       Fractal Image Format
FIFO      First-In, First-Out
FILO      First-In, Last-Out
FINDSTR   Find Strings
FIP       File Processor Buffering
FIPS      Federal Information Processing Standard
FIR       Fast Infrared + Finite Impulse Response
.FIRM     Business or Firm (Domain Name) [Internet]
FIRST     Forum of Incident Response and Security Teams
FITS   Flexible Image Transport System
FIU       Fingerprint Identification Unit [Sony]
FIX       Federal Internet Exchange
FK   Foreign Key
FLA       Four Letter Acronym
FLC       Ferro-electric Liquid Crystal
FLD       Field
FLL       FoxPro Link Library [Microsoft Fox Pro]
FLOPS     Floating Point Operations Per Second
.FLR      Folder (file name extension)
FMD   Fluorescent Multilayer Disk
FMRI   Functional Magnetic Resonance Imaging
FMS       Forms Management System
FMT       Format
FMV       Full Motion Video
FNT       Font
FOCUS     Forum of Control Data Users
FOD       Fax On Demand
FOG       First Osborne Group
FOIP      Fax Over Internet Protocol
FOIRL     Fiber Optic Inter Repeater Link [IEEE]
FOLDOC    Free On-Line Dictionary Of Computing
.FON      Font + Phone + Phone Directory (all file name
          extensions)
.FOR      Fortran source code (file name extension)
FORTH     (Programming Language)(See HLL)
FORTRAN   Formula Translator (Programming Language)(See HLL)
FOSE      Federal Office Systems Exposition
FOSI      Format Option Specification Instance
FOSSIL    Fido/Opus/Seadog Standard Interface Layer
FPC       Floating Point Calculation
FPCE      Floating-Point C Extension (specification)
FPGA      Field Programmable Gate-Array
FPLA      Field Programmable Logic-Array
FPM       Fast Page Mode
FPP       Fixed Path Protocol + Floating Point Processor
FPR       Floating-Point Register
FPS       Favorite Picture Selection + Frames Per Second
FPT       Forced Perfect Termination
FPU       Floating Point Unit
FPX   FlashPix (format) [Kodak]
FQDN      Fully Qualified Domain Name [Internet]
FRAD      Frame Relay Access Device +
          Frame Relay Assembler/Disassembler
FRAG      Fragment + Fragmentation
FRAM      Ferroelectric Random-Access Memory
FRC       Functional Redundancy Checking
FRED      Frame Editor + Front-End to Dish
FRPI      Flux Reversals Per Inch
.FRS      WordPerfect Graphics Driver (file name extension)
FS        File Separator
FSB       Front Side Bus
FSD       File System Driver [OS/2]
FSE       Full Screen Editor
FSF       Free Software Foundation [Internet]
FSK       Frequency Shift Keying
FSN       Full Service Network
FSO   Free Space Optics
FSP       File Service Protocol
FSR       Free System Resources
FST       Flat Square Tube (monitor)
F/T       Full Time
FTAM      File Transfer, Access and Management +
          File Transfer and Access Method
FTL       Flash Transition Layer [Intel]
FTM       Flat Tension Mask [Zenith]
FTP       File Transfer Protocol [Internet]
FTPD      File Transfer Protocol Daemon
FTTB   Fiber To The Basement
FTTC      Fiber To The Curb
FTTN   Fiber To The Neighborhood
FTS       Federal Telecommunication System
FTX       Fault Tolerant Unix
FUI       File Update Information
FUNC      Function
FVT       Full Video Translation +
   Functional Verification Test
FWTK   Firewall Toolkit
FXP   File Exchange Protocol
FYI       For Your Information
 

G...

GA        General Availability
GAAP      Generally Accepted Accounting Principles
GAL       Generic Array Logic
GAPI      Gateway Application Programming Interface
GART      Graphics Address Relocation Table
GATT      Graphics Address Translation Table
Gb        Gigabit (1,024 megabits) +
          (One Billion Bits of Information)
GB        Gigabyte (1,024 megabytes) +
          (One Billion Characters of Information)
GCC       GNU C-Compiler [Unix]
GCCD      Glass-Passivated Ceramic Chip Diode
GCR       Group Code Recording
GDA       Global Data Area + GNOME Data Access
GDB   GNU Debugger
GDDM      Graphics Data Display Manager
GDG       Generation Data Group [IBM]
GDI       Graphical Device Interface
GDLC      Generic Data Link Control [IBM]
GDP       Graphic Draw Primitive
GDT       Geometric Dimensioning and Tolerancing +
          Global Descriptor Table +
          Graphics Development Toolkit
GECOS     General Electric Comprehensive Operating System
GEIS      General Electric Information Service (company)
GEM       Graphics Environment Manager (DRI Program)
GENIE     General Electric Network for
          Information Exchange
GEO       Geostationary Earth Orbit
GEOS   Global Entity Ordering System +
GEOS      Graphic Environment Operating System [Geoworks]
GET       Get Execute Trigger
GFI       General Format Identifier + Ground-Fault Interceptor
GGP       Gateway-Gateway Protocol [Internet]
GHZ       Gigahertz
.GID      Topics (file name extension) [Microsoft]
.GIF      Graphics Interchange Format (file name extension)
GIG-E   Gigabit Ethernet
GIGO      Garbage In, Garbage Out
GII       Global Information Infrastructure
GILS      Government Information Locator Service
GIMP   GNU Image Manipulation Program
GIMPS     Great Internet Mersenne Prime Search
GINA      Graphical Identification and Authentication
GIS       Geographic Information System +
          Global Information Solutions [AT&T]
GIX       Global Internet Exchange [Internet]
GKS       Graphical Kernel System
GL        Graphics Language
G/L       General Ledger
GLIS      Global Land Information System [US Geological Survey]
GLM       General Linear Models
GLOBE     Global Learning by Observations to Benefit
          the Environment [Internet]
.GLY      Glossary (file name extension) [Microsoft Word]
GMDI   Gigabit Media-Dependent Interface
GML       Generalized Markup Language
GMP       Global Mobile Professional
GMR       Giant Magneto-Resistive (read head technology)
GMS       Global Management System +
          Global Messaging Service [Novell]
GMT       Greenwich Mean Time
GND       Ground (signal/system)
GNN       Global Network Navigator
GNU       Gnu's Not Unix (operating system)
GNOME     GNU Network Object Model Environment
GOAD   GNOME Object Activation Directory
GOSIP     Government Open Systems Interconnection Profile
.GOV      Governmental (Domain Name) [Internet]
GP        Gas Plasma + General Purpose
GPF       General Protection Fault
GPI       Graphics Programming Interface
GPIB      General Purpose Information/Interface Bus
GPIO   General Purpose Input/Output
GPL   General Public License
GPR       General Purpose Register [IBM]
GPRC      Glass Passivated Rectifier Chip
GPRS   General Packet Radio Service
GPS       Global Positioning Satellite/System +
          Global Product Specification
GPSS    * General Purpose Systems Simulator (language)
GPU       Graphics Processing Unit
GRADD     Graphics Adapter Device Driver [IBM]
GRE       Generic Routing Encapsulation + Graphics Engine
GREP      Global Regular Expression Print
.GRF      Graph (file name extension)
.GRP      Group (file name extension)
GS        Group Separator
GSI       General Server Interface
GSM       Global Shared Memory +
          Global System for Mobile-Communications (network)
GSNW      Gateway Service for NetWare [Microsoft]
GSP       Generic Server Passer + Global Service Provider
GSR   Gigabit Switch Router
GSTN      General Switched Telephone Network
GTE       General Telephone Electronics (corporation)
GTF       Generalized Timing Format
GTL       Gunning Transceiver Logic
GTO       Guide To Operations [IBM]
GTP     * Geometry Theorem Prover
GTS   Generic Traffic Shaping [Cisco]
GUI       Graphical User Interface
GUID      Globally Unique Identifier +
          Global Universal Identifier
GVT       Global Virtual Time
GW-BASIC  Gee Whiz BASIC
GWES   Graphic, Windowing and Event Subsystem
.gz       Compressed file (compressed filename extension -
          using GNU gzip compression/decompression program) [Unix]
GZIP      GNU Zip
 

H...

.H        Header (file name extension) [C]
HACMP     High Availability Cluster Multi-Processing [IBM]
HAL       Hard Array Logic + Hardware Abstraction Layer +
          House-Programmed Array Logic
HAL     * Heuristically Programmed Algorithmic (computer)
          [from 1968 movie "2001: A Space Odyssey"]
HAP       Host Access Protocol
HARP-MRI  Harmonic Phase MRI
HASP      Houston Automatic Spooling Priority (System)
HBA       Host Bus Adapter
HCL       Hardware Compatibility List
HCSS      High Capacity Storage System
HCU       Home Computer User
HD        Hard Disk + High Density
HDA       Head Disk Assembly
HDC   High Dependability Computing [Carnegie Mellon]
HDCD      High Definition Compatible Digital
HDCP   High-Bandwidth Digital Content Protection
HDD   Hard Disk Drive
HDF       Hierarchical Data Format [NCSA]
HDI       Head to Disk Interference
HDL       Hardware Description Language
HDLC      High-Level Data Link Control
HDM       Hardware Device Module
HDML      Handheld Device Markup Language
HDR       Header + High Data Rate
.HDR   Header Data (file name extension)
HDSC      High Density Signal Carrier [DEC]
HDSL      (See DSL)
HDSS      Holographic Data Storage System
HDT       Host Digital Terminal
HDTV      High Definition Television
HDVD      High Definition Volumetric Display
HDW       Hardware
HDX       Half Duplex
HEOS   High Earth Orbiting Satellite
HERC      Hercules
HEX       Hexadecimal
HFC       Hybrid Fiber-Coaxial
HFS       Hierarchical File System [Macintosh]
HFT       High Function Terminal [IBM]
HGA       Hercules Graphics Adapter
HGCP      Hercules Graphics Card Plus
HH        Hour
HIDS   Host-Based Intrusion Detection System
HIF       Hyper-G Interchange Format
HIFD      High-Density Floppy Disk
HIL       Human Interface Link [HP]
HIMEM     High Memory
HIPPI     High Performance Parallel Interface
HLCO      High Low Close Open
HLL       High Level Language
HLLAPI    High Level Language Application Programming Interface
.HLP      Help (file name extension)
HLQ       High Level Qualifier
HLS       Hue, Luminance, Saturation (color model)
HLT       Halt
HMA       High Memory Area [Microsoft] +
          Hub Management Architecture
HMD       Head Mounted Display
HMI   Human-Machine Interface
HMM       Hidden Markov Model
HMMP      Hyper-Media Management Protocol
HMOS      High Density Metal Oxide Semiconductor +
          High Speed Metal Oxide Semiconductor
HMP       Host Monitoring Protocol
HOL   High Order Logic
HOLAP   Hybrid OLAP
HOTT      Hot Off The Tree (electronic newsletter)
HOV       High Occupancy Vehicle
HP        Hewlett-Packard (Company)
HPC       Handheld Personal Computer
HPCC      High Performance Computing and Communications
HPDJ      Hewlett-Packard Desk Jet
HPFS      High-Performance File System
HPG       Hewlett-Packard Graphics
HPGL      Hewlett-Packard Graphics Language
HPIB      Hewlett-Packard Interface Bus
HPLJ      Hewlett-Packard Laser Jet
HPOM      Home Page Objects Model [Microsoft]
HPPA      Hewlett-Packard Precision Architecture
HPPI      High Performance Parallel Interface
HPR       High Performance Routing [IBM]
HPSB      High Performance Serial Bus
HPTC   High Performance Technical Computing
HPUX      Hewlett-Packard Unix
HPW       High Performance Workstation [Sun]
.HQX      BinHex (file name extension) [Macintosh]
HRIS      Human Resource Information System
HRG       High Resolution Graphics
HRMS      Human Resource Management System
HRTF      Head Related Transfer Function
HS        High Speed
HSB       Hue, Saturation, Brightness (color model)
HSC       Hierarchical Storage Controller + High Speed Channel
HSI       Hue, Saturation, Intensity
HSM       Hierarchical Storage Management
HSP       High Speed Printer/Processor
HSSI      High Speed Serial Interface
HST       High Speed Technology [U.S. Robotics]
.HST      History + Host (file name extensions)
HSV       Hue Saturation Value
HTML      HyperText Markup Language
HTTP      HyperText Transfer Protocol
HTTP-NG   HTTP Next Generation
HTTPS     HyperText Transfer Protocol Secure
HUD       Heads Up Display
HUT       Hopkins Ultraviolet Telescope
H/V       Horizontal/Vertical
HVP       Horizontal & Vertical Position
H/W       Hardware
HWCP      Hardware Code Page
HWD       Height-Width-Depth
HWDM   Hyperfine Wave Division Multiplexing
.HYP      Hyphenation (file name extension)
HYTELNET  Hypertext-browser for Telnet Accessible Sites
Hz        Hertz
 

I...

IA   Intel Architecture [Intel]
IAB       Internet Architecture Board
IAC       Inter-Application Communication [Macintosh]
IAD   Integrated Access Device
IAEC   International Address Element Code
IAG       Instruction Address Generation
IAK       Internet Access Kit [IBM]
IAL     * International Algebraic Language
          (ALGOL was first called IAL)
IANA      Internet Assigned Numbers Authority
IAP       Internet Access Provider
IAS       Internet Access Server
IAT       Import Address Table
IAUP      Internet User Account Provider
IBC       Instrument Bus Computer
iBCS      Intel Binary Compatibility Specification
IBIP      Information Based Indicia Program [U.S. Postal Service]
IBM       International Business Machines (Corporation)
IBM-GL    IBM Graphics Language
IC        Input Circuit + Integrated Circuit + Interrupt Controller
ICA       Intelligent Console Architecture +
          Intra-application Communications Area
ICANN   International Corporation for Assigned Names and Numbers
ICAP      Internet Calendar Access Protocol [Lotus]
ICAS      Intel Communicating Applications Specifications
ICB       Internet Citizen's Band
ICCP      Institute for the Certification of
          Computing Professionals
ICD       International Code Designator
ICE       In-Circuit Emulator [Intel] +
          Integrated Computing Environment [Langley Research]
ICES      Interference-Causing Equipment Standard
ICF   Internet Connection Firewall [Microsoft]
ICI       Image Component Information + Inter-CPU Interrupts
ICL       Interface Clear
ICLID     Incoming-Call Line Identification
ICM       Image Color Matching [Kodak] + Incoming Message
.ICM      Image Color Management (file name extension)
ICMP      Internet Control Message Protocol [Novell]
.ICO      Icon (file name extension)
iCOMP     Intel Comparative Microprocessor Performance [Intel]
ICP       Image Coprocessor + Integrated Channel Processor
ICQ       I Seek You (messaging program0
ICR       Intelligent Character Recognition
ICS       Internet Connection Sharing [Microsoft] +
          Intuitive Command Structure
ICSAPI    Internet Connection Services API
ICU       Instruction-Cache Unit +
          Intel Configuration Utility [Microsoft] +
          ISA Configuration Utility
ID        Identification + Identifier
IDA       Integrated Digital Access + Intelligent Disk Array +
          Intelligent Drive Array
IDAPI     Integrated Database Application Programming Interface
IDC       Integrated Database/Desktop Connector +
          Internet Database Connector [Microsoft] +
   Internet Data Center
IDDE      Integrated Development & Debugging Environment [Symantec]
IDE       Imbedded Drive Electronics +
          Integrated Development Environment [Borland] +
          Integrated Drive Electronics +
          Intelligent Drive Electronics +
          Interactive Design and Engineering +
          Interface Design Enhancement
IDEA      International Data Encryption Algorithm
IDEN   Integrated Data Enhanced Network
IDF       Intermediate Distribution Frame
IDI       Initial Domain Identifier
IDIV      Integer Divide
IDL       Interactive Data Language +
          Interface Definition Language
IDM       Integrated Document Management
IDMS      Integrated Data Base Management System
IDNX      Integrated Digital Network Exchange [IBM]
IDP       Integrated Data Processing
IDR       Intelligent Document Recognition
IDS   Intrusion Detection System
IDSL      (See DSL)
IDT       Interface Design Tool + Interrupt Descriptor Table
.IDX      Index (file name extension)
IE        Internet Explorer [Microsoft]
IEC       International Electrotechnical Commission
IEEE      Institute of Electrical and Electronics Engineers
IEF       Information Engineering Facility
IEMSI     Interactive Electronic Mail Standard
          Identification
IEN       Internet Engineering Notes
IETF      Internet Engineering Task Force
IESG      Internet Engineering Steering Group
I/F       Interface
IFC       Internet Foundation Classes
IFD       Image File Directory
IFF       Interchangeable File Format [Amiga]
IFG       Incoming Fax Gateway
IFP       Instruction Fetch Pipeline
IFS       Installable/Integated File System
IFSM      Information Systems Management
IGA       Integrated Graphics Array
IGC       Integrated Graphics Controller
IGES      Initial Graphics Exchange Standard
IGFET     Insulated-Gate Field Effect Transistor
IGMP      Internet Group Multicast Protocol
IGP       Interior Gateway Protocol
IGRP      Interior Gateway Routing Protocol [Cisco]
IGS       Internet Go Server
IHD       Integrated Help Desk [IBM]
IHV       Independent Hardware Vendor
IIF       Immediate Interface
III       Interstate Identification Index [NCIC]
IIOP      Internet Inter-ORB Protocol
IIR       Immediate Impulse Response
IIS       Internet Information Server/Services [Microsoft]
IITF      Information Infrastructure Task Force
IKE   Internet Key Exchange
IKMP      Internet Key Management Protocol
IKP       Internet Keyed Payments [IBM]
ILA       Image Light Amplifier
ILE       Integrated Language Environment [IBM]
ILEC   Incumbent Local Exchange Carrier
ILP       Instruction-Level Parallelism
ILS       International Language Support
IM   Instant Messenger
IMAC      Internet Macintosh [Apple]
IMACS     Image Management and Communication System
IMAP   Interactive Mail Access Protocol +
          Internet Message Access Protocol
IMAX      Maximum Image
IMDB      In-Memory Database
IMDS      Image Data Stream (format) [IBM]
IME       Input Method Editor
IMG       Image
.IMG   Image Data (file name extension)
IML       Initial Microcode Load [IBM]
IMP       Information/Interface Message Processor
IMPA      Intelligent Multi-Port Adapter [DCA]
IMPP   Internet Messaging and Presence Protocol
IMR       Internet Monthly Report
IMS       Information Management System +
          Intermediate Maintenance Standards
IMSI   International Mobile Subscriber Identity
IMSP      Internet Message Support Protocol
IMTC      International Multimedia Teleconferencing Consortium
IMTV      Interactive Multimedia Television
IMUL      Integer Multiply
IMUX      Inverse Multiplexer
IN        Input
INC       Increment
.IND      Index (file name extension)
.INF      Information (file name extension)
.INFO     Information Services (Domain Name) [Internet]
INFS      Internet Network File System
.INI      Initialize (file name extension)
INIT      Initialization + Initialize
INM       Integrated Network Management
INND      Internet News Daemon
INS       Input String + Integrated Network Server
INT       Integer + Internal + Interrupt +
          International (organization Domain name) [Internet]
INTA      Interrupt Acknowledge
InterNIC  Internet Network Information Center
INTO      Interrupt if Overflow occurs
I2O       Intelligent Input/Output
I/O       Input/Output
IOC       Inter-Office Channel
IOCC      Input/Output Channel Converter +
          Input/Output Controller Chip
IOCS      Input/Output Control System
IOCTL     Input/Output Control
IODE      Integrated Development and Debugging
          Environment [Symantec]
IOF   Infrared Optical Film
IOP       Input/Output Processor
IOPL      Input/Output Privilege Level
IOR       Interoperable Object Reference
IOS   Internet Operating System
IOSGA     Input/Output Support Gate Array
IP        Instruction Pointer + Intellectual Property +
   Internet Protocol
IPBF      Installed Peripheral Base Flexibility
IPC       Instructions Per Clock + Interprocess Communication
IPCMOS   Interlocked Pipeline CMOS [IBM]
IPCP      Internet Protocol Control Protocol
IPCS      Integrated PC Server
IPDC      Internet Protocol Device Control
IPDS      IBM Personal Dictation System [IBM] +
          Intelligent Printer Data Stream [IBM]
IPF   Invalid Page Format
IPFC      Information Presentation Facility Compiler [IBM]
IPI       Intelligent Peripheral Interface
IPL       Initial Program Load/Loader +
          Ion Projection Lithography
IPL     * Information Programming Language
IPM       Images Per Minute + Interpersonal Message
IPMI      Intelligent Platform Management Interface
IPNG      Internet Protocol, next generation
IPP   Integrated Performance Primitives [Intel] +
          Internet Printing Protocol
IPR   Intellectual Property Rights
IPSE      Integrated Project Support Environment
IPSEC   Internet Protocol Security
IPTC      International Press Telecommunications Council
IPX       Internetwork Packet Exchange [Novell]
IQL       Interactive Query Language
IR        Infrared
IRC       Internet Relay Chat
IRD       Integrated Receiver/Descrambler
IRDA      Infrared Data Association
IRDS      Information Resource Dictionary System
IRET      Interrupt Return
IRF       Intermediate Routing Function +
          Inheritance Rights Filter [Novell]
IRIS   Infrastructure for Resilient Internet Systems
IRL       Interactive Reader Language + Inter-Repeater Link
IRLAP     Infrared Link Access Protocol
IRLED     Infrared Light Emitting Diode
IRM       Information Resource Management + Inherent Rights Mask
IRQ       Interrupt Request
IRQL   Interrupt Request Level
IRTF      Internet Research Task Force
IRX       Information Retrieval Experiment
IS        Information System + Interrupt Status
ISA       Industry Standard Architecture (bus) [IBM] +
          Instruction-Set Architecture
ISAKMP   Internet Security Association and Key Management Protocol
ISAM      Indexed Sequential-Access Management/Method
ISAPI     Internet Server API [Microsoft]
ISBN      International Standard Book Number
ISC       Instruction Set Computer + Inter-Systems
          Communication [IBM]
ISD       Image Section Descriptor +
          Instructional Systems Design
ISDN      Integrated Services Digital Network
ISH       Information Super Highway
ISI       Internally Specified Index
ISIS      Integrated Systems and Information Services
ISKM      Internet Starter Kit for the Macintosh
ISL       Interactive System Language +
   Inter Switch Link [Cisco]
ISM       Integrated Services Model [IETF] +
          Internet Service Manager [Microsoft]
ISMF      Interactive Storage Management Facility
ISOC      Internet Society
ISO       International Organization for Standardization
ISP       Internet Service Provider + Interrupt Stack Pointer +
          Interrupt Status Port
ISPF      Interactive System Programming Facility
ISR       Information Storage and Retrieval +
          Interrupt Service Routine +
          Interrupt Status Register
ISRC   International Standard Recording Code
ISS   Internet Sharing Software
ISSN      International Standard Serial Number
ISV       Independent Software Vendor
IT        Information Technology
ITB       Information Technology Branch + Intermediate Text Block
ITC       International Typeface Corporation
ITE       Information Technology Equipment
ITF       Interactive Test Facility
ITN       Identification Tasking and Networking
ITP   Internet Transaction Processing
ITR   Information Technology Research [NSF] +
          Input Transaction Record + Internet Talk Radio
ITU       International Telecommunication Union
ITUG      International Telecommunications User Group
ITU-TIES  ITU-Telecom Information Exchange Services
ITU-TSS   ITU-Telecommunication Standards Section
ITV       Interactive Television
ITX       Intermediate Text Block
IU        Integer Unit
IUAP      Internet User Account Provider
IUS/ITB   Interchange Unit Separator/Intermediate Transmission
          Block
IVDS      Integrated Voice and Data Systems
IVIS      Interactive Video Information System
IVL       Independent Vendor League + Intel Verification Lab
IVR       Interactive Voice Response
IVS       Interactive Videodisk System
IVT       Interrupt Vector Table
IV&V      Independent Verification & Validation
I-WAY     Information Highway
IXC       Interexchange Carrier
 

J...

JA        Jump Address + Jump if Above
JAD       Joint Application Design/Development
JADE   Java Addition to the Default System
JAE       Jump if Above or Equal
JANET     Joint Academic Network
JAR       Java Archive (file format)
JAXM   Java API for XML Messaging
JBE       Jump if Below or Equal
JC        Jump if Carry set
JCA   Java Cryptography Architecture
JCL       Job Control Language
JDBC      Java Database Connectivity
JDF   Job Description format
JDK       Java Development Kit
JDSL   Java Data Structures Library
JE        Jump if Equal
JEDEC     Joint Electronic Devices Engineering Council
JEIDA     Japanese Electronics Industry Development Association
JEPI      Joint Electronic Payment Initiative
JES       Job Entry System
JFC       Java Foundation Classes
JFET      Junction Field Effect Transistor
JFIF      JPEG File Interchange Format
JFS       Journaled File System [IBM]
JG        Jump if Greater
JGE       Jump if Greater or Equal
JIPS      JANET Internet Protocol Service
JIT       Just-In-Time (compiler)
JL        Jump if Less
JLE       Jump if Less than or Equal to
JLIP      Joint Level Interface Protocol
JMAPI     Java Management Application Program Interface
JMF       Java Media Framework [Sun]
JMI   Java Metadata Interface
JMP       Jump
JMS       Java Message Service
JMX   Java Management Extensions
JNA       Jump if Not Above
JNAE      Jump if Not Above or Equal
JNB       Jump if Not Below
JNBE      Jump if Not Below or Equal
JNG       Jump if Not Greater
JNGE      Jump if Not Greater or Equal
JNI       Java Native Interface
.JNK      Junk (file name extension)
JNLE      Jump if Not Less or Equal
JNO      Jump if No Overflow
JNP       Jump if No Parity
JNS       Jump if No Sign
JOE       Java Objects Everywhere
JOHNNIAC* John Neumann Integrator and
          Automatic Computer [Rand Corp.]
JOSS    * Johnniac Open Shop System [Rand Corp.]
JPE       Jump if Parity Even
JPEG      Joint Photographic Experts Group
JPL       Jet Propulsion Laboratory
JPNF   Join-Projection Normal Form
JPO       Jump if Parity Odd
JRE       Java Runtime Environment
JS        Jump if Sign
JSP   Java Server Page
JSSE   Java Secure Socket Extension
JTAG   Joint Test Action Group [IEEE]
JTAPI     Java Telephony Application Programming Interface
JZ        Jump if Zero
JNZ       Jump if Not Zero
JSS       Java-Script Style Sheet
JUGHEAD   Jonzy's Universal Gopher Hierarchy
          Excavation and Display [Internet]
JVM       Java Virtual Machine
 

K...

K-12      Kindergarten through 12th Grade [US Education System]
KAM       Keep Alive Memory
Kb        Kilobit
KB        Keyboard + Kilobyte (1,024 bytes)
KBD       Keyboard (also KEYB)
KBD$      Keyboard [OS/2]
KBE       Knowledge Based Engineering
Kbps      Kilobits Per Second
KBps      Kilobytes Per Second
KDE   K Desktop Environment
KDT       Key Definition Table
KEFIR     Key Findings Reporter [GTE]
KEYBBE    Foreign language KEYBoard program - Belgium
KEYBBR    Foreign language KEYBoard program - Brazil
KEYBCF    Foreign language KEYBoard program - Canadian-French
KEYBCZ    Foreign language KEYBoard program - Czechoslovakia
(Czech)
KEYBDK    Foreign language KEYBoard program - Denmark
KEYBFR    Foreign language KEYBoard program - France
KEYBGR    Foreign language KEYBoard program - Germany
KEYBHU    Foreign language KEYBoard program - Hungary
KEYBIT    Foreign language KEYBoard program - Italy
KEYBLA    Foreign language KEYBoard program - Latin America
KEYBNL    Foreign language KEYBoard program - Netherlands
KEYBNO    Foreign language KEYBoard program - Norway
KEYBPL    Foreign language KEYBoard program - Poland
KEYBPO    Foreign language KEYBoard program - Portugal
KEYBSF    Foreign language KEYBoard program - Swiss-French
KEYBSG    Foreign language KEYBoard program - Swiss-German
KEYBSL    Foreign language KEYBoard program - Czechoslovakia
(Slovak)
KEYBSP    Foreign language KEYBoard program - Spain
KEYBSU    Foreign language KEYBoard program - Finland
KEYBSV    Foreign language KEYBoard program - Sweden
KEYBUK    Foreign language KEYBoard program - United Kingdom
KEYBUS    Foreign language KEYBoard program - United States
KEYBYU    Foreign language KEYBoard program - Yugoslavia
KHz       Kilohertz
KIF       Knowledge Interchange Format
KIS       Knowbot Information Service [Internet]
KPI       Kernel Programming Interface
KQML      Knowledge Query and Manipulation Language
KRS   Knowledge Retrieval System
KSDS   Keyed Sequential Data Set
KSH       Korn Shell (program) [Unix]
KSPH      Keystrokes Per Hour
KSR       Keyboard Send Receive
KVM   Keyboard, Video, Mouse (switch) +
   Kilobyte Virtual Machine
 

L...

L2F       Layer Two Forwarding [Cisco]
L2TP      Layer Two Tunneling Protocol
LADDR     Layered Device Driver Architecture [Microsoft]
LALL      Longest Allowed Lobe Length
LAN       Local Area Network
LANACS    Local Area Network Asynchronous Connection Server
LANDP     LAN Distributed Platform
LANE      Local Area Network Emulation
LANG      Language
LAP   Linux Application Platform
LAPB      Link Access Procedure Balanced (protocol)
LAPD      Link Access Procedure on the D-Channel (protocol)
LAPM      Link Access Procedure for Modems
LAR       Load Access Rights
LASER     Light Amplification by Stimulated Emission of Radiation
LASTport  Local Area Storage Transport (protocol) [DEC]
LAT       Local Access Terminal +
          Local Area Transport [DEC]
LATA      Local Access and Transport Area
LAVC      Local Area VAX Cluster
LAWN      Local Area Wireless Network
LB        Left Button (of 2 or 3 button Mouse)
LBA       Logical Block Addressing
LBL       Label
LBR       Librarian
.LBR      Library (file name extension)
LBT       Listen Before Talk
LBX       Local Bus Accelerator
LCA       Lotus Communications Architecture [Lotus]
LCC       Leadless Chip Carrier
LCCM   LAN Client Control Manager [IBM]
LCD       Liquid Crystal Display + Lowest Common Denominator
LCF       Low Cost Fiber
LCK       Library Construction Kit [Microsoft FoxPro]
LCP       Link Control Protocol
LCR       Least Cost Routing + Line Control Register
LCSD      Laminate Chip Signal Diode
LCU       Last Cluster Used
LDA       Logical Device Address
LDAP      Lightweight Directory Access Protocol [IBM]
LDC       Lotus Development Corporation
LDDS      Long Distance Discount Services (company)
LDM       Logical Disk Manager + Long Distance Modem
LDP   Label Distribution Protocol
LDT       Local Descriptor Table
LE        Less or Equal
LEA       Load Effective Address
LEAD   Live Early Adoption and Demonstration [W3C]
LEAF      Law Enforcement Access Field
LEC       Local Area Network Emulation Client +
          Local Exchange Carrier
LED       Light Emitting Diode
LEL       Link, Embed and Launch-to-edit [Lotus]
LEM       Language Extension Module
LEN       Low Entry Networking
LEO       Low Earth Orbit
LEP   Light-Emitting Polymers
LES       Local Area Network Emulation Server
.LET      Letter (file name extension)
LEX       Lexicon
LF        Line Feed
L2F   Layer 2 Forwarding (protocol) [Cisco]
LFAP      Lightweight Flow Admission Protocol
LFI       Last File Indicator
LFM   Log File Monitor
LFN       Long File Name
LFT       Low Function Terminal [IBM]
LFU       Least Frequently Used
LGA       Leadless Grid Array
LGDT      Load Global Descriptor Table
LGPL     Lesser General Public License
LIAS      Library Information Access System
.LIB      Library (file name extension)
LIC       Line Interface Coupler [IBM]
LICS      Lotus International Character Set [LDC]
LIDT      Load Interrupt Descriptor Table
LIEP      Large Internet Exchange Packet [Novell]
LIF       Low Insertion Force
LIFO      Last In, First Out
LILO      Last In, Last Out
LIM       Lotus/Intel/Microsoft
LIMA      Lotus/Intel/Microsoft/AST
LIMDO     Light Intensity Modulation Direct Overwrite
LIMM      Light Intensity Modulation Method
LIMS      Library Information Management System
LINUX     (Operating system named after Linus Torvalds)
LIP       Large Internet Packet
LIPS      Lightweight Internet Person Schema +
          Logical Inferences Per Second
LISP      List Processing (Language)(See HLL)
LISTSERV  List Server [Internet]
LIU       LAN Interface Unit
LIW       Long Instruction Word
LLC       Logical Link Control
LLDT      Load Local Descriptor Table
LLF       Low Level Format
LMB       Left Mouse Button
LMBCS     Lotus Multi-Byte Character Set [Lotus]
LMD       Last Modification Date
LMDS      Local Multipoint Distribution Service
LMI       Link/Local Management Interface
LMOS   Leave Mail On Server
LMS       Lotus Messaging Switch [Lotus]
LMSW      Load Machine Status Word
LMU       LAN Management Utilities [IBM] +
          LAN Manager for Unix
LN        Load Number + Logarithm (Natural)
LN:DI     Lotus Notes:Document Imaging
LNK       Link
LOB       Line of Business
LOC       Lines Of Code + Loop On-Line Control
LOCIS     Library of Congress Information System
LOD       Letter Of Destruction + Level Of Detail
LODSB     Load String Byte
LOG       Logarithm (Base 10)
LOGO      (Programming Language)(See HLL)
LON       Local Operating Network
LOOPE     Loop while Equal
LOOPNE    Loop while Not Equal
LOOPNZ    Loop while Not Zero
LOOPZ     Loop while Zero
LORE      Line Oriented Editor
LPAR      Logic Programming and Automated Reasoning
LPC       Local Procedure Call
LPD       Line Printer Daemon (protocol) [Berkley]
LPDU   Logical Protocol Data Unit
LPI       Lines Per Inch
LPL       Lotus Programming Language [Lotus 1-2-3] [LDC]
LPM       Lines Per Minute
LPN       Logical Page Number
LPR       Line Printer + Line Printer Remote
LPS       Low-Power Schottky
LPT       Line Printer Terminal
LPT1      First Parallel Printer Port
LPT2      Second Parallel Printer Port
LPT3      Third Parallel Printer Port
LQ        Letter Quality
LQM       Link Quality Monitoring (protocol)
LR        Link Register
LRC       Local Register Cache +
          Longitudinal Redundancy Check
LRL       Least Recently Loaded
LRM       Language Reference Manual + Least Recently-Used Master
.LRS      Language Resource (file name extension) [WordPerfect]
LRU       Least Recently Used
LSA       LAN and SCSI Adapter [IBM] + Line Sharing Adapter +
          Local Security Authority [Microsoft]
LSAPI     License Services Application Program Interface
LSB       Least Significant Bit
LSC       Least Significant Character
LSD       Least Significant Digit
LSI       Large Scale Integration
LSL       Link Support Layer + Load Segment Limit
LST       List
.LST      List (file name extension)
LTO       Linear Tape Open
L2TP   Layer 2 Transport/Tunneling Protocol
LTPS   Low-Temperature Polysilicon
LTR       Left-To-Right + Letter + Load Task Register
LU        Logical Unit (Also LUN)
LUA       Logical Unit Application (interface)
LUI       Local User Input
LUIS      Library User Information Service
LUN       Logical Unit Number
LUT       Lookup Table
LV        Logical Volume [IBM]
LVDS      Low-Voltage Differential Signaling
LVM       Logical Volume Management [IBM]
LW        Lazy Write
.LYR      Lyrics (music file name extension)
LZW       Lempel-Ziv-Welch (algorithm)
 

M...

mA        Milliampere
MAC       Macintosh (Apple Macintosh Computer) +
          Mandatory/Media/Medium Access Control +
          Message Authentication Code
MAC     * Multiple Access Computers
.MAC      MacPaint (file name extension) +
          Macro (file name extension)
MACH      Multilayer Actuator Head [Epson]
MADE      Manufacturing and Automated Design Engineering
MADYMO    Mathematical Dynamic Modeling [TNO]
MAE       Merit Access Exchange + Metropolitan Area Ethernet
MAGMA     Minimal Architecture for Generalized Markup Applications
mAh       Milliampere-Hour
MAI       Multiple Applications Interface
.MAI      Mail (file name extension)
MAJC      Microprocessor Architecture for Java Computing [Sun]
MAN       Manual [Unix] + Metropolitan Area Network
MANIAC  * Mathematical Analyzer Numerical
          Integrator and Computer
MANPAGE   Manual Page [Unix]
MAP       Maintenance Analysis Procedures +
          Manufacturing Automation Protocol +
          Memory Allocation Map
.MAP      Linker Map (file name extension)
MAPI      Mail/Messaging Applications Programming
          Interface [Microsoft]
MAPICS    Manufacturing, Accounting and Production
          Information Control System [IBM]
MARC      Machine Readable Cataloging +
          Multi-Technology Automated Reader Card
MARVEL    Machine-Assisted Realization of the Virtual
          Electronic Library [Library of Congress]
MASM      Macro Assembler [Microsoft]
MASS      Maximum Availability and Support
          Subsystem [Parallan]
MAT       Maintenance Access Terminal
MAU       Media Access/Adapter Unit + Multistation Access Unit
MAVDM     Multiple Application VDM
MAX       Maximum
MB        Megabyte (1,024 kilobytes) +
          Middle Button (of 3 button Mouse)
MBASIC    Microsoft BASIC [Microsoft]
MBCS      Multi-Byte Character Set [IBM]
MBONE     Multicast Backbone [Internet]
MBps      Megabytes Per Second
Mbps      Megabits Per Second
MBR       Master Boot Record
MBX       Mailbox
MCA       Micro Channel Adapter/Architecture [IBM]
MCAD      Mechanical Computer Aided Design
MCB       Memory Control Block
MCF       Meta Content Framework
MCGA      Multicolor Graphics Array
MCH   Memory Controller Hub [Intel]
MCI       MCI Communications Corp. (name from initials of
          original company - Microwave Communications, Inc.) +
          Media Control Interface [Microsoft]
MCL       Microsoft Compatibility Labs [Microsoft]
MCM       Multi-Chip Module
MCNE      Master Certified Novell Engineer [Novell]
MC-PGA    Metallized Ceramic - Pin Grid Array
MCPS      Microsoft Certified Product Specialist [Microsoft]
MC-QFP    Metallized Ceramic - Quad Flat Pack
MCR       Modem Control Register
MCSD      Microsoft Certified Systems Developer [Microsoft]
MCSE      Microsoft Certified Systems Engineer [Microsoft]
MCU       Microcontroller Unit + Multi-Chip Unit [DEC] +
          Multipoint Control Unit
MD        Make Directory + Mini Disk [Sony] + Monochrome Display
MDA       Model Drive Architecture + Monochrome Display Adapter +
          Multidimensional Analysis
MDDBMS    Multidimensional Data Base Management System
.MDF      Menu Definition File (file name extension)
MDI       Memory Display Interface +
          Multiple Document Interface
MDIC      Manchester Decoder and Interface Chip [AT&T]
MDK       Multimedia Developers Kit [Microsoft]
MDLP      Mobile Data Link Protocol
MDR       Metadata Repository + Minimum Design Requirement
MDX   Multi-Dimensional Expressions
MDY       Month Day Year
.ME       Opening Information (file name extension) (As in READ.ME)
MEB       Memory Expansion Board
MED   Minimum Expected Delay
MEG       Megabyte
MEM       Memory
MEMS   Micro-Electro-Mechanical System
.MEN      Menu (file name extension)
MERCI     Multimedia European Research Conferencing Integration
MES       Manufacturing Execution System
MESI      Modified, Exclusive, Shared and Invalid (protocol)
MET       Memory Enhancement Technology [Hewlett-Packard]
.MET      Metafile (file name extension)
MFC       Microsoft Foundation Class [Microsoft]
MFFS      Microsoft Flash File System [Microsoft]
MFI       Multifunction Interpreter
MFIOP     Multifunction I/O Processor
MFLOPS    Million Floating Point Operations Per Second
MFM       Modified Frequency Modulation
MFP       Multi-Function Peripheral/Printer/Product
MFPI      Multifunction Peripheral Interface
MFS       Macintosh File System [Macintosh] +
          Magnetic Tape Field Search + Memory File System
          Modified Filing System [Revelation Technologies]
MFT       Master File Table +
          Multiprogramming with a Fixed number of Tasks
MGA       Monochrome Graphics Adapter
MGCP      Media Gateway Control Protocol
MGE       Modular GIS Environment
MGET      Multiple Get [Unix]
MGML      Minimal Generalized Markup Language
MGR       Manager
MHS       Message Handling Service + Message Handling System
MHz       Megahertz
MI        Management Interface
MIB       Management Information Base
MIC       Message Integrity Check
MICR      Magnetic Ink Character Recognition
MICRO     One-millionth
MICS      Macro Interpretive Commands
MID   Mobile Information Device
MIDI      Musical Instrument Digital Interface
MIDP   Mobile Information Device Profile
MIF       Management Information Format
.MIF      Management Information Files (file name extension)
MIG       Metal In Gap
MII       Microsoft/IBM/Intel
MIL       Machine Interface Layer [Go Corporation] +
.MIL      Military (Domain name) [Internet]
MIM       Map Image Metafile + Metal-Insulator-Metal (screen)
MIMD      Multiple Instruction Multiple Data Stream (processor)
MIME   Multimedia Internet Message Extensions +
          Multipurpose Internet Mail Extensions
MI/MIC    Mode Indicate/Mode Indicate Common
MIN       Minimum + Mobile Identification Number
MIND      Microsoft Internet Developer [Microsoft]
MINUET    Minnesota Internet Users Essential Tools [Internet]
MIPS      Million Instructions Per Second
MIS       Management Information System +
          Multimedia Information Sources [Internet]
MISC      Miscellaneous
MIX       Member Information Exchange
.MIX   Microsoft Picture It! (format)
MKDIR     Make Directory
ML        Machine Language + Meta Language
MLAPI     Multilingual Application Programming Interface
MLC       Multilayer Ceramic +
          Multilevel Cell (program) [Internet]
MLE       Multi-Line Editor
MLID      Multi-Link Interface Driver
MLM       Mailing List Manager [Internet]
MLP   Meridian Lossless Packing
MLPPP     Multilink PPP
MM        Minutes + Month
MMA       Microcomputer Managers Association
MMC       Matched Memory Cycle + Microcomputer Marketing Council +
          Microsoft Management Console [Microsoft] +
   Multimedia Card
MMCD      MultiMedia Compact Disk
MMCX      Multimedia Communication Exchange [Lucent Technologies]
MMDS   Multi-channel Multipoint Distribution Service
MMF   Multi Mode Fiber (cable)
MMI       Man-Machine Interface
MMIS      Materials Manager Information System
MMPM      Multi Media Presentation Manager
MMS   Multimedia Messaging Service
MMU       Memory Management Unit
MMVF      Multimedia Video File [NEC]
MMX       Matrix Manipulation Extensions [Intel] +
          Multimedia Extensions
MNOS      Metal Nitride Oxide Semiconductor
MNP       Microcom Networking Protocol [Microcom]
.MNU      Menu (fine name extension)
MO        Magneto-Optical (disk drive)
MOB       Memory-Order Buffer
MOBO      Mother Board
MOD       Module + Modulus
MODEM     Modulator Demodulator
MOHLL     Machine Oriented High Level Language
MOLAP     Multidimensional On-Line Analytical Processing
MOM       Manufacturing Operations Management +
          Message-Oriented Middleware +
          Microsoft Office Manager [Microsoft]
MONET     Multiwavelength Optical Networking
MONO      Monaural
MOO       MUD, Object Oriented [Internet]
MOP       Maintenance Operations Protocol
MOPS      Million Operations Per Second
MOS       Magneto-Optic Storage + Mean Opinion Score +
          Metal Oxide Semiconductor
MOSFET    Metal Oxide Semiconductor Field Effect Transistor
MOTD      Message Of The Day
MOV       Metal Oxide Varistor + Move
MOVS      Move String
MP        Massively Parallel (processing) + Multiple Processors
MP3       MPEG Audio Layer 3
.MPA   Memo Pad Archive (file name extension) [Palm]
MPC       Multimedia Personal Computer + Multipath Channel
MPCS      Mission Planning and Control Station (Software)
MPE       Multiple Programming Executive [HP]
MPEG      Moving Picture Experts Group
MPI       Message Passing Interface + Multiprecision Integer
MPLS   Multi Protocol Label Switching [Cisco]
MPM       Message Passing Library [IBM]
MPMD      Multiple Processor/Multiple Data
MPOA      Multi-Protocol over Asynchronous-Transfer-Mode
MPP       Massively Parallel Processing/Processors +
          Message Posting Protocol + Message Processing Program
MPQP      Multi-Protocol Quad Port [IBM]
MPR       Multipart Repeater + Multi Protocol Router [Novell]
MPS       Multiprocessor Specification
MPTN      Multi-Protocol Transport Network
MPTS      Multi-Protocol Transport Services
MPU       Microprocessor Unit
MQI       Messaging and Queuing Interface [IBM]
MR        Magneto Resistive + Modem Ready
MRAM   Magnetic Random Access Memory
MRCF      Microsoft Realtime Compression Format
MRCI      Microsoft Realtime Compression Interface
MRI       Magnetic Resonance Imaging
MRM       Most Recently-Used Master
MRO       Multi-Region Operation
MRP       Manufacturing Resources Planning +
   Materials Requirement Planning
MRPL      Main Ring Path Length
MRS       Media Recognition System
MRT       Mean Repair Time
MRU       Maximum Receive Unit + Most Recently Used
MS        Memory System + Message Store + Microsecond +
          Microsoft Corporation + Millisecond
MSACM     Microsoft Audio Compression Manager [Microsoft]
MSAU      Multi-Station Access Unit
MSAV      Microsoft Anti Virus [Microsoft]
MSB       Most Significant Bit
MSBF      Mean Swaps Between Failures
MSC   Mobile Switching Center
MSCDEX    Microsoft Compact Disc Extensions [Microsoft]
MSCE   Microsoft Certified Software Engineer [Microsoft]
MSCHAP    Microsoft Challenge Handshake Authentication
          Protocol [Microsoft]
MSCS   Microsoft Cluster Server [Microsoft]
MSD       Mass Storage Device + Most Significant Digit +
          Microsoft System Diagnostics [Microsoft]
MSDE      Microsoft Data Engine [Microsoft1)
MSDN      Microsoft Developer Network [Microsoft]
MS-DOS    Microsoft - Disk Operating System [Microsoft]
MSDR      Multiplexed Streaming Data Request
MSDS      Microsoft Developer Support [Microsoft]
MSFR      Minimum Security Function Requirements [IBM]
MSG       Message
.MSG      Program Message (file name extension)
MSI       Medium Scale Integration
MSIE      Microsoft Internet Explorer [Microsoft]
MSIMN   Microsoft Internet Mail and News [Microsoft]
MSL       Map Specification Library + Mirrored Server Link
MSMQ      Microsoft Message Queue-Server [Microsoft]
MSN       Microsoft Network [Microsoft]
MSO       Multiple Service/Systems Operator
.MSP      Microsoft Paint (file name extension) [Microsoft]
MSQL   Mini SQL
MSR   Microsoft Reserved Partition [Microsoft]
MSRP      Manufacturer Suggested Retail Price
MSS       Mass Storage System +
          Multiprotocol Switched Services [IBM]
MSTS      Microsoft Terminal Server [Microsoft]
MSW       Machine Status Word
MSXML   Microsoft XML [Microsoft]
MTA       Message Transfer Agent + Multimedia Terminal Adapter +
   Multiple Terminal Access
MTBB      Mean Time Between Breakdowns
MTBF      Mean Time Between Failures
MTBJ      Mean Time Between Jams
MTF       Microsoft Tape Format [Microsoft] +
          Modulation Transfer Function
MTH   Memory Translator Hub
MTRP      Maximum Transfer Rate Performance
MTS       Message Transfer Service/System +
          Microsoft Transaction Server [Microsoft] +
          Multichannel Television Sound
MTSO   Mobile Telephone Switching Office
MTST      Magnetic Tape Selectric Typewriter [IBM]
MTT       Multi-Transaction Timer
MTTD      Mean Time To Diagnose
MTTF      Mean Time To Failure
MTTR      Mean Time To Repair
MTU       Maximum Transmission Unit
MUA       Mail User Agent
MUD       Multi-User Dialogue/Dimension/Domain/Dungeon [Internet]
MUG   Multiuser Game
MUL       Multiply
MULTICS   Multiplexed Information and Computing Service
MUMPS     Massachusetts General Hospital Utility
          Multi-Programming System (Programming Language)
MUSE      Multi-User Shared Environment
.MUSEUM   Museums (Domain Name) [Internet]
MUSIC   Multiparty Multimedia Session Control
MUT       Monitor Under Test
MUX       Multiplexer
mV        Millivolt
MVB       Multimedia Viewer Book
MVC       Multimedia Viewer Compiler
MVD   Multivalued Dependencies
MVDM      Multiple Virtual DOS Machines
MVGA      Monochrome Video Graphics Array
MVIP      Multi-Vendor Integration Protocol
MVP       Multimedia Video Processor
MVS       Multiple Virtual Storage
MVT       Multiprogramming with a Variable number of Tasks
MX        Mail Exchanger [Internet]
MXS       Microsoft Exchange Server [Microsoft]
MZR       Multiple Zone Recording