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A

• AA - Anti-Aliasing
• AT - Advanced Technology
• AABB - Axis Aligned Bounding Box
• AAC - Advanced Audio Coding (audio compression format defined by the MPEG-2 standard)
• ABI - Application Binary Interface
• ACID - Atomiticy Consistency Isolation Durability
• ACL - Access Control List
• ACM - Association for Computing Machinery
• ACPI - Advanced Configuration and Power Interface
• AES - Advanced Encryption Standard
• APCI - Application-Layer Protocol Control Information
• APIC - Advanced Programmable Interrupt Controller
• ADC - Apple Display Connector (DVI variant)
• ADO - ActiveX Data Object
• ADSL - Asymmetric Digital Subscriber Line (variant of DSL)
• AGP - Accelerated Graphics Port (sometimes used with a suffix indicating the port's bandwidth, like AGP4x)
• AI - Artificial Intelligence
• AIX - Advanced Interactive Executive
• AIM - AOL Instant Messenger
• ALSA - Advanced Linux Sound Architecture
• ALU - Arithmetic and Logical Unit
• AMD - Advanced Micro Devices
• AMI - American Megatrends Inc. (BIOS manufacturer)
• AMR - Audio Modem Riser
• ANSI - American National Standards Institute
• AOL - America Online
• AOP - Aspect-Oriented Programming
• API - Application Programming Interface
• ARP - Address Resolution Protocol
• ARPA - Address and Routing Parameter Area
• ARPA - Advanced Research Projects Agency (see also DARPA)
• ARPANET - Advanced Research Projects Agency Network
• ASCII - American Standard Code for Information Interchange
• ASIC - Application Specific Integrated Circuit
• ASN.1 - Abstract Syntax Notation 1
• ASP - Application Service Provider
• ASP (MS ASP) - Active Server Pages
• ATA - Advanced Technology Attachment
• ATAPI - Advanced Technology Attachment Packet Interface
• ATI - Array Technology Industry
• AT&T - American Telephone & Telegraph
• AVI - Audio Video Interleaved
• AWT - Abstract Windowing Toolkit

B

• BASIC - Beginner's All-Purpose Symbolic Instruction Code (acronym was added later)
• BBS - Bulletin Board System
• BCD - Binary Coded Decimal
• BER - Bit Error Rate
• BiDi - Bi-Directional
• BINAC - Binary Automatic Computer
• BIND - Berkeley Internet Name Daemon
• BIOS - Basic Input Output System
• BJT - Bipolar Junction Transistor
• BNC - Bayonet Neill-Concelman
• BOFH - Bastard Operator From Hell
• BOOTP - Bootstrap Potocol
• BSA - Business Software Alliance
• BSD - Berkeley Software Distribution (Unix variant)
• BSOD - Blue Screen of Death (MS Windows specific)
• BSS - Block Started by Symbol
• BT - BitTorrent
• BW - Bandwidth

C

• CAD - Computer-Aided Design
• CAE - Computer-Aided Engineering
• CAID - Computer Aided Industrial Design
• CAM - Computer-Aided Manufacturing
• CAQ - Computer Aided Quality
• CASE - Computer-Aided Software Engineering
• CD - Compact Disc
• CDE - Common Desktop Environment
• CD-R - CD-Recordable
• CD-ROM - CD Read-Only Memory
• CD-RW - CD-Rewritable
• CERT - Computer Emergency Response Team
• CF - Compact Flash
• CFD - Computational Fluid Dynamics
• CFG - Context-Free Grammar
• CFG - Control Flow Graph
• CG - Computer Graphics
• CGA - Color Graphics Array
• CGI - Common Gateway Interface
• CGI - Computer-Generated Imagery
• CISC - Complex Instruction Set Computer
• CJK - Chinese, Japanese, and Korean
• CJKV - Chinese, Japanese, Korean, and Vietnamese
• CLI - Command Line Interface
• CLR - Common Language Runtime
• CM - Configuration Management
• CM - Content Management
• CMOS - Complementary Metal-Oxide Semiconductor
• CMS - Content Management System
• CNC - Computer Numerical Control
• COBOL - Common Business-Oriented Language
• COM - Component Object Model
• CORBA - Common Object Request Broker Architecture
• CPAN - Comprehensive Perl Area Network
• CPU - Central Processing Unit
• CRC - Cyclic Redundancy Check
• CRM - Customer Relationship Management
• CRT - Cathode Ray Tube
• CS - Computer Science
• CSE - Computer Science and Engineering
• CSS - Cascading Style Sheets
• CSS - Content-Scrambling System
• CSS - Closed Source Software
• CSS - Cross Site Scripting
• CSV - Comma-Separated Values
• CT - Computerized Tomography
• CTCP - Client-To-Client Protocol
• CTSS - Compatible Time-Sharing System
• CVS - Concurrent Versioning System

D

• DARPA - Defense Advanced Research Projects Agency
• DAO - Data Access Objects
• DAP - Directory Access Protocol
• DAT - Digital Audio Tape
• DB - Database
• DBA - Database Administrator
• DBMS - Database Management System
• DCC - Direct Client-to-Client
• DCL - Data Control Language
• DCOM - Distributed Component Object Model
• DD - Double Density
• DDE - Dynamic Data Exchange
• DDL - Data Definition Language
• DDoS - Distributed Denial of Service
• DDR - Double Data Rate
• DEC - Digital Equipment Corporation
• DES - Data Encryption Standard
• DHCP - Dynamic Host Configuration Protocol
• DHTML - Dynamic HTML
• DIMM - Dual Inline Memory Module
• DIP - Dual In-line Package
• DIVX - Digital Video Express
• DL - Download
• DLL - Dynamic Link Library
• DLP - Digital Light Processing
• DMA - Direct Memory Access
• DMCA - Digital Millennium Copyright Act
• DML - Data Manipulation Language
• DN - Distinguished Name
• DND - Drag-and-Drop
• DNS - Domain Name System
• DOM - Document Object Model
• DoS - Denial of Service
• DOS - Disk Operating System
• DP - Dot Pitch
• DPI - Dots Per Inch
• DRAM - Dynamic Random Access Memory
• DRM - Digital Rights Management
• DTD - Document Type Definition
• DTP - Desktop Publishing
• DVD - Digital Video Disc

E

• EBCDIC - Extended Binary Coded Decimal Interchange Code
• ECC - Elliptic Curve Cryptography
• ECMA - European Computer Manufacturers Association
• EDO - Extended Data Out
• EDSAC - Electronic Delay Storage Automatic Computer
• EDVAC - Electronic Discrete Variable Automatic Computer
• EEPROM - Electronically-Eraseable Programmable Read-Only Memory
• EFF - Electronic Frontier Foundation
• EFI - Extensible Firmware Interface
• EGA - Enhanced Graphics Array
• EIDE - Enhanced IDE
• EISA - Extended Industry Standard Architecture
• ELF - Extremely Low Frequency
• ELF - Executable and Linkable Format
• ELM - Electronic Mail
• EMACS - Editor Macros
• ENIAC - Electronic Numerical Integrator And Computer
• EOF - End of File
• EOL - End of Life
• EOL - End of Line
• EPROM - Eraseable Programmable Read-Only Memory
• ERP - Enterprise Resource Planning
• ESD - Electrostatic Discharge
• ESR - Eric Steven Raymond
• EULA - End User License Agreement

F

• FAP - FORTRAN Assembly Program
• FAT - File Allocation Table
• FAQ - Frequently Asked Questions
• FCB - File Control Block
• FDD - Floppy Disk Drive
• FET - Field Effect Transistor
• FIFO - First In First Out
• FHS - Filesystem Hierarchy Standard
• FLAC - Free Lossless Audio Codec
• FLOPS - Floating-Point Operations Per Second
• FLOSS - Free/Libre Open Source Software
• FOLDOC - Free On-line Dictionary of Computing
• FOSS - Free/Open Source Software
• FPGA - Field Programmable Gate Array
• FPU - Floating Point Unit
• FS - File System
• FSB - Front Side Bus
• FSF - Free Software Foundation
• FTP - File Transfer Protocol
• FUD - Fear Uncertainty Doubt

G

• G11N - Globalization
• Gb - Gigabit
• GB - Gigabyte
• GCC - GNU Compiler Collection (formerly GNU C Compiler)
• GDB - GNU Debugger
• GFDL - GNU Free Documentation License
• GIF - Graphics Interchange Format
• GIGO - Garbage In Garbage Out
• GIMP - GNU Image Manipulation Program
• GIMPS - Great Internet Mersenne Prime Search
• GIS - Geographic Information System
• GNOME - GNU Object Model Environment
• GNU - GNU's Not Unix
• GPG - GNU Privacy Guard
• GPIB - General-Purpose Instrumentation Bus
• GPL - General Public License
• GRUB - Grand Unified Boot-Loader
• GTK - GIMP Toolkit
• GUI - Graphical User Interface
• GUID - Globally Unique IDentifier

H

• HAL - Hardware Abstraction Layer
• HCI - Human Computer Interaction
• HD - High Density
• HDD - Hard Disk Drive
• HDL - Hardware Description Language
• HF - High Frequency
• HIG - Human Interface Guidelines
• HIRD - Hurd of Interfaces Representing Depth
• HP - Hewlett-Packard
• HPFS - High Performance File System
• HT - Hyper Threading
• HTML - Hypertext Markup Language
• HTTP - Hypertext Transport Protocol
• HTTPd - Hypertext Transport Protocol Daemon
• HURD - Hird of Unix-Replacing Daemons
• Hz - Hertz

I

• I18N - Internationalization
• IANA - Internet Assigned Numbers Authority
• IBM - International Business Machines
• IC - Integrated Circuit
• ICANN - Internet Corporation for Assigned Names and Numbers
• ICMP - Internet Control Message Protocol
• IDE - Integrated Development Environment
• IDE - Integrated Drive Electronics
• IDL - Interface Definition Language
• IE - Internet Explorer
• IEC - International Electrotechnical Commission
• IEEE - Institute of Electrical and Electronics Engineers
• IETF - Internet Engineering Task Force
• IGMP - Internet Group Management Protocol
• IIOP - Internet Inter-Orb Protocol
• IM - Instant Messaging
• IMAP - Internet Message Access Protocol
• IP - Intellectual Property
• IP - Internet Protocol
• IPX - Internetwork Packet Exchange
• IRC - Internet Relay Chat
• IrDA - Infrared Data Association
• IRQ - Interrupt Request
• IS - Information Systems
• ISA - Industry Standard Architechture
• ISDN - Integrated Services Digital Network
• ISO - International Organization for Standardization
• ISP - Internet Service Provider
• ISPF - Interactive System Productivity Facility
• IT - Information Technology
• ITU - International Telecommunication Union

J

• JAXP - Java API for XML Processing
• JCL - Job Control Language
• JDBC - Java Database Connectivity
• JDK - Java Development Kit
• JDS - Java Desktop System
• JFC - Java Foundation Classes
• JNI - Java Native Interface
• JPEG - Joint Photographic Experts Group
• JFET - Junction Field-Effect Transistor
• JFS - Journaling Filesystem
• JIT - Just-In-Time
• JRE - Java Runtime Environment
• JS - JavaScript
• JSP - Jackson Structured Programming
• JSP - JavaServer Pages
• JVM - Java Virtual Machine
• jwz - Jamie Zawinski

K

• Kb - Kilobit
• KB - Kilobyte
• KDE - K Desktop Environment
• kHz - KiloHertz
• KISS - Keep It Simple, Stupid

L

• L10N - Localization
• LAMP - Linux Apache MySQL (Perl, PHP, or Python)
• LAN - Local Area Network
• LCD - Liquid Crystal Display
• LCOS - Liquid Crystal On Silicon
• LDAP - Lightweight Directory Access Protocol
• LED - Light-Emitting Diode
• LF - Low Frequency
• LFS - Linux From Scratch
• LIFO - Last In First Out
• LILO - Linux Loader
• LGPL - [GNU] Lesser General Public License
• LOC - Lines of Code
• LPI - Linux Professional Institute
• LSB - Least Significant Bit
• LSB - Linux Standard Base
• LSI - Large-Scale Integration
• LUG - Linux User Group
• LZW (algorithm) - Lempel-Ziv-Welch

M

• MAC - Media Access Control
• MAN - Metropolitan Area Network
• MAPI - Messaging Application Programming Interface
• Mb - Megabit
• MB - Megabyte
• MCA - Micro Channel Architecture
• MCSE - Microsoft Certified System Engineer
• MDA - Monochrome Display Adapter
• ME - [Windows] Millennium Edition
• MF - Medium Frequency
• MFC - Microsoft Foundation Classes
• MHz - Megahertz
• MIPS - Million Instructions Per Second
• MIPS - Microprocessor without Interlocked Pipeline Stages
• MIS - Management Information Systems
• MIT - Massachusetts Institute of Technology
• MIME - Multipurpose Internet Mail Extensions
• MMORPG - Massively Multiplayer Online Role-Playing Game
• MMU - Memory Management Unit
• MMX - Multi-Media Extensions
• MNG - Multiple-image Network Graphics
• MOSFET - Metal-Oxide Semiconductor FET
• MOTD - Message Of The Day
• MPAA - Motion Picture Association of America
• MPEG - Motion Pictures (Coding) Experts Group
• MPL - Mozilla Public License
• MS - Microsoft
• MSB - Most Significant Bit
• MS-DOS - Microsoft DOS
• MSDN - Microsoft Developer Network
• MSI - Medium-Scale Integration
• MUD - Multi-User Dungeon
• MVS - Multiple Virtual Storage

N

• NAT - Network Address Translation
• NCSA - National Center for Supercomputing Applications
• NDS - Novell Directory Services
• NFS - Network Filesystem
• NI - National Instruments
• NIC - Network Interface Card
• NIST - National Institute of Standards and Technology
• NP - Non-Deterministic Polynomial-Time
• NPL - Netscape Public License
• NPU - Numeric Processing Unit?
• NS - Netscape
• NSA - National Security Agency
• NMI - Non-Maskable Interrupt
• NNTP - Network News Transfer Protocol
• NT - New Technology
• NTFS - NT Filesystem
• NURBS - Nonuniform rational B-spline
• NVRAM - Non-Volatile Random Access Memory

O

• ODBC - Open Database Connectivity
• OLE - Object Linking and Embedding
• OLED - Organic Light Emitting Diode
• OMG - Object Management Group
• OO - Object-Oriented
• OO - Open Office
• OOo - OpenOffice.org
• OOP - Object-Oriented Programming
• ORB - Object Request Broker
• OS - Open Source
• OS - Operating System
• OSDN - Open Source Developer Network
• OSI - Open Source Initiative
• OSI - Open Systems Interconnect
• OSS - Open Sound System
• OSS - Open Source Software
• OSTG - Open Source Technology Group (formerly OSDN)

P

• P2P - Peer-To-Peer
• PAN - Personal Area Network
• PARC - Palo Alto Research Center
• PATA - Parallel ATA
• PCB - Printed Circuit Board
• PC - Personal Computer
• PCI - Peripheral Component Interconnect
• PCMCIA - Personal Computer Memory Card International Association
• PCM - Pulse-Code Modulation
• PD - Public Domain
• PDA - Personal Digital Assistant
• PDF - Portable Document Format
• PDP - Programmed Data Processor
• PERL - Practical Extraction and Reporting Language
• PGA - Programmable Gate Arrays
• PGP - Pretty Good Privacy
• PHP - PHP: Hypertext Preprocessor
• PINE - Program for Internet News & Email (unofficially PINE Is Not Elm)
• PID - Proportional-Integral-Derivative
• PID - Process ID
• PIO - Programmed Input/Output
• PKI - Public Key Infrastructure
• PLD - Programmable Logic Device
• PL/I - Programming Language One
• PL/M - Programming Language Microcomputer
• PNG - Portable Network Graphics
• PnP - Plug-and-Play
• POP - Point of Presence
• POP3 - Post Office Protocol v3
• POSIX - Portable Operating System Interface
• PPC - PowerPC
• PPI - Pixels Per Inch
• PPP - Point-to-Point Protocol
• PPPoE - PPP over Ethernet
• PS - PostScript
• PS/2 - Personal System/2
• PVR - Personal Video Recorder
• PXE - Pre Execution Environment
• PXI

Q

• QoS - Quality of Service
• QOTD - Quote of the Day
• Qt - Quasar Toolkit

R

• RAD - Rapid Application Development
• RAID - Redundant Array of Inexpensive Disks
• RAM - Random Access Memory
• RARP - Reverse Address Resolution Protocol
• RC - Release Candidate
• RCS - Revision Control System
• RDBMS - Relational Database Management System
• RDF - Resource Description Framework
• RF - Radio Frequency
• RFC - Request For Comments
• RFE - Request For Enhancement
• RFI - Radio Frequency Interference
• RFID - Radio Frequency Identification
• RGB - Red, Green, Blue
• RH - Red Hat (Linux)
• RHEL - Red Hat Enterprise Linux
• RIAA - Recording Industry Association of America
• RIP - Raster Image Processor
• RIP - Routing Information Protocol
• RISC - Reduced Instruction Set Computer
• RLE - Run-Length Encoding
• RMI - Remote Method Invocation
• RMS - Richard Matthew Stallman
• ROM - Read Only Memory
• RPC - Remote Procedure Call
• RPM - RedHat Package Manager
• RSA - Rivest Shamir Adleman
• RSS - RDF Site Summary
• RSS - Really Simple Syndication
• RSS - Rich Site Summary
• RTOS - Real Time Operating System

S

• SAN - Storage Area Network
• SATA - Serial ATA
• SAX - Simple API for XML
• SCP - Secure Copy
• SCSI - Small Computer System Interface
• SDK - Software Development Kit
• SDRAM - Synchronous Dynamic Random Access Memory
• SEAL - Semantics-directed Environment Adaptation Language
• SEI - Software Engineering Institute
• SFTP - Secure FTP
• SFTP - Simple File Transfer Protocol
• SFTP - SSH File Transfer Protocol
• SGI - Silicon Graphics, Incorporated
• SGML - Standard Generalized Markup Language
• SHA - Secure Hash Algorithm
• SIGGRAPH - Special Interest Group on Graphics,
• SIMD - Single Instruction, Multiple Data
• SIMM - Single Inline Memory Module
• SIP - Session Initiation Protocol
• SLIP - Serial Line Internet Protocol
• SMB - Server Message Block
• SMC - SMC Networks (company)
• SMIL - Synchronized Multimedia Integration Language
• S/MIME - Secure/Multipurpose Internet Mail Extensions
• SMP - Symmetric Multi-Processing
• SMS - Short Message Service
• SMT - Simultaneous Multithreading
• SMTP - Simple Mail Transfer Protocol
• SNMP - Simple Network Management Protocol
• SOAP - Simple Object Access Protocol
• SO-DIMM - Small Outline DIMM
• SP - Service Pack
• SPARC - Scalable Processor Architecture
• SQL - Structured Query Language
• SRAM - Static Random Access Memory
• SSH - Secure Shell
• SSI - Server Side Includes
• SSI - Small-Scale Integration
• SSL - Secure Socket Layer
• SUS - Single UNIX Specification
• SVG - Scalable Vector Graphics
• SVGA - Super Video Graphics Array
• SWT - Stardard Widget Toolkit

T

• TB - Terabyte
• Tcl - Tool Command Language
• TCP - Transmission Control Protocol
• TCP/IP - Transmission Control Protocol/Internet Protocol
• TFT - Thin Film Transistor
• TI - Texas Instruments
• Tk -
• TLA - Three-Letter Acronym
• TLD - Top-Level Domain
• TLS - Transport Layer Security
• TSO - Time Sharing Option
• TSP - Traveling Salesman Problem
• TTL - Transistor-Transistor Logic
• TTL - Time To Live
• TTY - Teletype
• TUCOWS - The Ultimate Collection of Winsock Software

U

• UDDI - Universal Description, Discovery, and Integration
• UDMA - Ultra DMA
• UDP - User Datagram Protocol
• UHF - Ultra High Frequency
• UI - User Interface
• UL - Upload
• UML - Unified Modeling Language
• UML - User Mode Linux
• UPS - Uninterruptible Power Supply
• URI - Uniform Resource Identifier
• URL - Uniform Resource Locator
• URN - Uniform Resource Name
• USB - Universal Serial Bus
• UTC - Coordinated Universal Time
• UTF - Unicode Transformation Format
• UUCP - Unix to Unix Copy Protocol

V

• VAX - Virtual Address eXtension
• VR - Virtual Reality
• VRML - Virtual Reality Modeling Language
• VB - Visual Basic
• VBA - Visual Basic for Applications
• VBS - Visual Basic Script
• VESA - Video Electronics Standards Association
• VFAT - Virtual FAT
• VFS - Virtual File System
• VGA - Video Graphics Array
• VHF - Very High Frequency
• VLB - Vesa Local Bus
• VLF - Very Low Frequency
• VLSI - Very-Large-Scale Integration
• VM - Virutal Memory
• VM - Virtual Machine
• VoIP - Voice over IP
• VPN - Virtual Private Network
• VT - Video Terminal?
• VTAM - Virtual Telecommunications Access Method

W

• W3C - World Wide Web Consortium
• WAFS - Wide Area File Services
• WAIS - Wide Area Information Servers
• WAN - Wide Area Network
• WAP - Wireless Access Point
• WAP - Wireless Application Protocol
• WAV - WAVEform audio format
• WebDAV - WWW Distributed Authoring and Versioning
• WEP - Wired Equivalent Privacy
• WOL - Wake on LAN
• WMA - Windows Media Audio
• WPA - Wi-Fi Protected Access
• WSDL - Web Services Description Language
• WWW - World Wide Web
• WYSIWYG - What You See Is What You Get

X

• XAML - eXtensible Application Markup Language
• XFS -
• XHTML - eXtensible Hypertext Markup Language
• XML - eXtensible Markup Language
• XMMS - X Multimedia System
• XP - Cross Platform (not Windows XP)
• XPCOM - Cross Platform Component Object Model
• XPI - Cross Platform Installer
• XPIDL - Cross Platform IDL
• XSL-T - eXtensible Stylesheet Language Transformations
• XSS - Cross Site Scripting
• XT -
• XUL - XML-based User-interface Language

Y

• YACC - Yet Another Compiler Compiler
• YAML - YAML Ain't Markup Language
• YAST - Yet Another Setup Tool

Z

• ZIF - Zero Insertion Force
• ZOPE - Z Object Publishing Environment

See also

• Acronym
• Internet slang
• file formats
• Profession Certifications

External links

• The Free On-line Dictionary of Computing
• The UNIX Acronym List
• Virtual Entity of Relevant Acronyms