List of computing and IT abbreviations
There are many abbreviations associated with the computer industry - PC, IT, CPU etc. Add them to this listing, sorted alphabetically by abbreviation. Internet slang gives rise to a number of abbreviations not listed here, as do many common file extensions and file formats.
See also
External links
0-9
- /. - Slashdot
- 10B2 - 10 Base2
- 10B5 - 10 Base5
- 10B-F - 10 Base-F
- 10B-FB - 10 Base-FB
- 10B-FL - 10 Base-FL
- 10B-FP - 10 Base-FP
- 10B-T - 10 Base-T
- 10B-FX5 - 10 Base-FX
- 100B-T - 100 Base-T
- 100B-TX - 100 Base-TX
- 100BVG - 100 BaseVG
- 286 - 80286
- 2B1Q - 2 Binary 1 Quaternary
- 386 - 80386
- 486 - 80486
- 4B5BLF - 4 Byte 5 Byte Local Fiber
- 802 - 802.x (where x is a number from 1 to 22)
- 8B10BLF - 8 Byte 10 Byte Local Fiber
A
- AA - Anti-Aliasing
- AAA - Authentication Authorization, Accounting
- AABB - Axis Aligned Bounding Box
- AAC - Advanced Audio Coding (audio compression format defined by the MPEG-2 standard)
- AAL - ATM Adaptation Layer
- AALC - ATM Adaptation Layer Connection
- AARP - AppleTalk Address Resolution Protocol
- ABI - Application Binary Interface
- ABM - Asynchronous Balanced Mode
- ABR - Area Border Router
- ABR - Auto Baud - Rate Detect
- ABR - Available Bit Rate
- AC - Alternating Current
- AC - Acoustic Coupler
- ACID - Atomiticy Consistency Isolation Durability
- ACL - Access Control List
- ACL - Active Current Loop
- ACM - Association for Computing Machinery
- ACPI - Advanced Configuration and Power Interface
- ACD - Automatic Call Distributor
- ACF - Advanced Communications Function
- ACF NCP - Advanced Communications Function - Network Control Program
- ACK - ACKnowledgement
- ACR - Allowed Cell Rate
- ACR - Attenuation to Crosstalk Ratio
- AD - Active Directory
- AD - Administrative Domain
- ADC - Apple Display Connector (DVI variant)
- ADB - Apple Desktop Bus
- ADCCP - Advanced Data Communications Control Protocol/Procedures
- ADO - ActiveX Data Object
- ADSL - Asymmetric Digital Subscriber Line (variant of DSL)
- AE - Adaptive Equalizer
- AES - Advanced Encryption Standard
- AGP - Accelerated Graphics Port (sometimes used with a suffix indicating the port's bandwidth, like AGP4x)
- AH - Active Hub
- AI - Artificial Intelligence
- AIM - AOL Instant Messenger
- AIX - Advanced Interactive Executive
- AJAX - Asynchronous JavaScript and XML
- AL - Active Link
- AL - Access List
- ALSA - Advanced Linux Sound Architecture
- ALU - Arithmetic and Logical Unit
- AM - Active Matrix
- AM - Access Method
- AM - Active Monitor
- AMD - Advanced Micro Devices
- AMI - American Megatrends Inc. (BIOS manufacturer)
- AMR - Audio Modem Riser
- ANSI - American National Standards Institute
- ANT - Another Neat Tool
- AoE - ATA-over-Ethernet
- AOL - America Online
- AOP - Aspect-Oriented Programming
- APCI - Application-Layer Protocol Control Information
- API - Application Programming Interface
- APIC - Advanced Programmable Interrupt Controller
- APL - A Programming Language
- APS - Accunet Packet Service
- APR - Apache Portable Runtime
- ARM - Advanced RISC Machines
- ARP - Address Resolution Protocol
- ARPA - Address and Routing Parameter Area
- ARPA - Advanced Research Projects Agency (see also DARPA)
- ARPANET - Advanced Research Projects Agency Network
- AS - Access Server
- ASCII - American Standard Code for Information Interchange
- ASG - Abstract Semantic Graph
- ASIC - Application Specific Integrated Circuit
- ASN.1 - Abstract Syntax Notation 1
- ASP - Application Service Provider
- ASP (MS ASP) - Active Server Pages
- AST - Abstract Syntax Tree
- AT - Advanced Technology
- AT - Access Time
- AT - Active Terminator
- ATA - Advanced Technology Attachment
- ATAPI - Advanced Technology Attachment Packet Interface
- ATG - Advanced Technology Group
- ATI - Array Technology Industry
- AT&T - American Telephone & Telegraph
- AVC - Advanced Video Coding
- AVI - Audio Video Interleaved
- AWT - Abstract Windowing Toolkit
B
- B2B - Business-to-Business
- Bash - Bourne-again shell
- BASIC - Beginner's All-Purpose Symbolic Instruction Code (acronym was added later)
- BBS - Bulletin Board System
- BCD - Binary Coded Decimal
- BER - Bit Error Rate
- BFD - Binary File Descriptor
- BFS - Breadth-First Search
- BiDi - Bi-Directional
- BINAC - Binary Automatic Computer
- BIND - Berkeley Internet Name Daemon
- BIOS - Basic Input Output System
- BJT - Bipolar Junction Transistor
- Blog - Web Log
- BMP - Basic Multilingual Plane
- BNC - Bayonet Neill-Concelman
- BOFH - Bastard Operator From Hell
- BOOTP - Bootstrap Protocol
- bps - bits per second
- 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
- CA - Certificate Authority
- 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
- CDMA - Code Division Multiple Access
- 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
- CGT - Computational Graph Theory
- CIFS - Common Internet Filesystem
- CIM - Common Information Model
- 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
- CN - Canonical Name
- Common Name?
- CNC - Computer Numerical Control
- CNR - Communication and Networking Riser
- COBOL - Common Business-Oriented Language
- COM - Component Object Model
- CORBA - Common Object Request Broker Architecture
- CPAN - Comprehensive Perl Archive Network
- cps - characters per second
- CPU - Central Processing Unit
- CR - Carriage Return
- CRAN - Comprehensive R Archive Network
- CRC - Cyclic Redundancy Check
- CRLF - Carriage Return Line Feed
- CRM - Customer Relationship Management
- CRT - Cathode Ray Tube
- CS - Cable Select
- CS - Computer Science
- CSE - Computer Science and Engineering
- CSRF - Cross-Site Request Forgery
- CSS - Cascading Style Sheets
- CSS - Content-Scrambling System
- CSS - Closed Source Software
- CSS - Cross Site Scripting
- CSV - Comma-Separated Values
- CT - Computerized Tomography
- CTAN - Comprehensive TeX Archive Network
- CTCP - Client-To-Client Protocol
- CTS - Clear To Send
- CTSS - Compatible Time-Sharing System
- CVS - Concurrent Versioning System
D
- DARPA - Defense Advanced Research Projects Agency
- DAO - Data Access Objects
- DAO - Disk-At-Once
- DAP - Directory Access Protocol
- DAT - Digital Audio Tape
- DB - Database
- DBA - Database Administrator
- DBCS - Double Byte Character Set
- DBMS - Database Management System
- DCC - Direct Client-to-Client
- DCL - Data Control Language
- DCMI - Dublin Core Metadata Initiative
- 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
- DFD - Data Flow Diagram
- DFS - Depth-First Search
- 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
- DPMI - DOS Protected Mode Interface
- DPMS - Display Power Management Signaling
- DRAM - Dynamic Random Access Memory
- DRI - Direct Rendering Infrastructure
- DRM - Digital Rights Management
- DRM - Direct Rendering Manager
- DSDL - Document Schema Definition Languages
- DSDM - Dynamic Systems Development Method
- DSLAM - Digital subscriber line access multiplexer
- DSN - Database Source Name (ODBC)
- DSN - Dataset Name? (OS/390)
- DTD - Document Type Definition
- DTP - Desktop Publishing
- DTR - Data Terminal Ready?
- DVD - Digital Video Disc / Digital Versatile Disc
- DVR - Digital Video Recorder (see also PVR)
E
- EAP - Extensible Authentication Protocol
- EBCDIC - Extended Binary Coded Decimal Interchange Code
- EBML - Extensible Binary Meta Language
- ECC - Elliptic Curve Cryptography
- ECMA - European Computer Manufacturers Association
- EDI - Electronic Data Interchange
- 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
- eID - electronic ID
- EIDE - Enhanced IDE
- EISA - Extended Industry Standard Architecture
- ELF - Extremely Low Frequency
- ELF - Executable and Linkable Format
- ELM - Electronic Mail
- EMACS - Editor Macros
- EMS - Expanded Memory Specification
- ENIAC - Electronic Numerical Integrator And Computer
- EOF - End of File
- EOL - End of Life
- EOL - End of Line
- EOM - End of Message
- EPROM - Eraseable Programmable Read-Only Memory
- ERP - Enterprise Resource Planning
- ESCON - Enterprise Systems Connection
- 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
- FDDI - Fiber Distributed Data Interface
- FDMA - Frequency-Division Multiple Access
- FEC - Forward Error Correction
- FET - Field Effect Transistor
- FICON - Fiber Connectivity
- 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
- FOSDEM - Free and Open source Software Developers' European Meeting
- 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
- FSM - Finite State Machine
- FTTP - Fiber To The Premises
- FTP - File Transfer Protocol
- FQDN - Fully Qualified Domain Name
- FUD - Fear Uncertainty Doubt
G
- G11N - Globalization
- Gb - Gigabit
- GB - Gigabyte
- GCC - GNU Compiler Collection (formerly GNU C Compiler)
- GDB - GNU Debugger
- GDI - Graphics Device Interface
- 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
- GLUT - OpenGL Utility Toolkit
- 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
- HBA - Host Bus Adapter
- HCI - Human Computer Interaction
- HD - High Density
- HDD - Hard Disk Drive
- HD-DVD - High Definition DVD
- 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
- iBCS - Intel Binary Compatibility Standard
- IBM - International Business Machines
- IC - Integrated Circuit
- ICANN - Internet Corporation for Assigned Names and Numbers
- ICE - In-Circuit Emulator
- ICE - Intrusion Countermeasure Electronics
- 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
- IFL - Integrated Facility for Linux
- IGMP - Internet Group Management Protocol
- IIOP - Internet Inter-Orb Protocol
- IM - Instant Messaging
- IMAP - Internet Message Access Protocol
- IME - Input Method Editor
- I/O - Input/Output
- IP - Intellectual Property
- IP - Internet Protocol
- IPC - Inter-Process Communication
- IPsec - Internet Protocol security
- 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
- ISV - Independent Software Vendor
- 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
- JFET - Junction Field-Effect Transistor
- JFS - Journaling Filesystem
- JINI - Jini Is Not Initials
- JIT - Just-In-Time
- JNI - Java Native Interface
- JPEG - Joint Photographic Experts Group
- JRE - Java Runtime Environment
- JS - JavaScript
- JSON - JavaScript Object Notation
- JSP - Jackson Structured Programming
- JSP - JavaServer Pages
- JVM - Java Virtual Machine
- jwz - Jamie Zawinski
K
- KB - Keyboard
- Kb - Kilobit
- KB - Kilobyte
- KB - Knowledge Base
- KDE - K Desktop Environment
- kHz - KiloHertz
- KISS - Keep It Simple, Stupid
- KVM - Keyboard, Video, Mouse
L
- L10N - Localization
- LAMP - Linux Apache MySQL (Perl, PHP, or Python)
- LAN - Local Area Network
- LBA - Logical Block Addressing
- LCD - Liquid Crystal Display
- LCOS - Liquid Crystal On Silicon
- LDAP - Lightweight Directory Access Protocol
- LE - Logical Extents
- LED - Light-Emitting Diode
- LF - Line Feed
- LF - Low Frequency
- LFS - Linux From Scratch
- LIF - Low Insertion Force
- LIFO - Last In First Out
- LILO - Linux Loader
- LKML - Linux Kernel Mailing List
- 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
- LTR - Left-to-Right
- LUG - Linux User Group
- LUN - Logical Unit Number
- LV - Logical Volume
- LVM - Logical Volume Management
- LZW - Lempel-Ziv-Welch
M
- MAC - Media Access Control
- MAN - Metropolitan Area Network
- MANET - Mobile Ad-Hoc Network
- MAPI - Messaging Application Programming Interface
- Mb - Megabit
- MB - Megabyte
- MBCS - Multi Byte Character Set
- MBR - Master Boot Record
- 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
- MoBo - Motherboard
- MOO - MUD Object Oriented
- 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
- MT - Machine Translation
- MTU - Maximum Transmission Unit
- MSDN - Microsoft Developer Network
- MSI - Medium-Scale Integration
- MUD - Multi-User Dungeon
- MVC - Model-View-Controller
- MVS - Multiple Virtual Storage
N
- NACK - Negative ACKnowedgement
- NAK - Negative AcKnowedgement Character
- NAT - Network Address Translation
- NCSA - National Center for Supercomputing Applications
- NDS - Novell Directory Services
- NEXT - Near-End CrossTalk
- NFS - Network Filesystem
- NI - National Instruments
- NIC - Network Interface Card
- NIST - National Institute of Standards and Technology
- NLP - Natural Language Processing
- NP - Non-Deterministic Polynomial-Time
- NPL - Netscape Public License
- NPU - Numeric Processing Unit?
- NS - Netscape
- NSA - National Security Agency
- NSPR - Netscape Portable Runtime
- NMI - Non-Maskable Interrupt
- NNTP - Network News Transfer Protocol
- NOC - Network Operations Center
- NOP - No OPeration
- NT (Windows) - New Technology
- NT - New Trails Technology
- NTFS - NT Filesystem
- NTLM - NT Lan Manager
- NTP - Network Time Protocol
- NURBS - Nonuniform rational B-spline
- NVRAM - Non-Volatile Random Access Memory
O
- OASIS - Organization for the Advancement of Structured Information Standards
- ODBC - Open Database Connectivity
- OEM - Original Equipment Manufacturer
- OFTC - Open and Free Technology Community
- OLAP - Online Analytical Processing
- OLE - Object Linking and Embedding
- OLED - Organic Light Emitting Diode
- OLTP - Online Transaction Processing
- 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
- OSPF - Open Shortest Path First
- OSS - Open Sound System
- OSS - Open Source Software
- OSS - Operation Support Systems
- OSTG - Open Source Technology Group (formerly OSDN)
- OUI - Organizationally Unique Identifier
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
- PE - Physical Extents
- PERL - Practical Extraction and Reporting Language
- PGA - Pin Grid Array
- PGA - Programmable Gate Arrays
- PGP - Pretty Good Privacy
- PHP - PHP: Hypertext Preprocessor
- PIC - Peripheral Interface Controller
- PID - Proportional-Integral-Derivative
- PID - Process ID
- PINE - Program for Internet News & Email (unofficially PINE Is Not Elm)
- PIO - Programmed Input/Output
- PKCS - Public Key Cryptography Standards
- PKI - Public Key Infrastructure
- PLC - Programmable Logic Controller
- PLD - Programmable Logic Device
- PL/I - Programming Language One
- PL/M - Programming Language Microcomputer
- PMM - POST Memory Manager
- PNG - Portable Network Graphics
- PnP - Plug-and-Play
- POP - Point of Presence
- POP3 - Post Office Protocol v3
- POSIX - Portable Operating System Interface
- POST - Power-On Self Test
- PPC - PowerPC
- PPI - Pixels Per Inch
- PPP - Point-to-Point Protocol
- PPPoE - PPP over Ethernet
- PS - PostScript
- PS/2 - Personal System/2
- PSVI - Post-Schema-Validation Infoset
- PV - Physical Volume
- PVG - Physical Volume Group
- PVR - Personal Video Recorder
- PXE - Pre Execution Environment
- PXI
Q
- QA - Quality Assurance
- QoS - Quality of Service
- QOTD - Quote of the Day
- Qt - Quasar Toolkit
R
- RACF - Resource Access Control Facility
- RAD - Rapid Application Development
- RADIUS - Remote Authentication Dial In User Service
- RAID - Redundant Array of Inexpensive Disks
- RAIT - Redundant Array of Inexpensive Tapes
- RAM - Random Access Memory
- RARP - Reverse Address Resolution Protocol
- RC - Release Candidate
- RC - Run Commands
- RC - Runtime Configuration
- RCS - Revision Control System
- RDBMS - Relational Database Management System
- RDF - Resource Description Framework
- REFAL - REcursive Functions Algorithmic Language
- 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 - Rich Site Summary, RDF Site Summary, or Really Simple Syndication
- RTL - Right-to-Left
- RTOS - Real Time Operating System
- RTS - Ready To Send
S
- SAN - Storage Area Network
- SATA - Serial ATA
- SAX - Simple API for XML
- SCADA - Supervisory Control And Data Aquisition
- SCP - Secure Copy
- SCSI - Small Computer System Interface
- SD - Secure Digital
- SDIO - Secure Digital Input Output
- SDK - Software Development Kit
- SDL - Simple DirectMedia Layer
- SDN - Service Delivery Network
- SDR - Software-Defined Radio
- SDRAM - Synchronous Dynamic Random Access Memory
- SDSL - Symmetric DSL
- 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
- SIP - Supplementary Ideographic Plane
- SLI - Scalable Link Interface
- SLIP - Serial Line Internet Protocol
- SLM - Service Level Management
- SMB - Server Message Block
- SMBIOS - System Management BIOS
- SMC - SMC Networks (company)
- SMIL - Synchronized Multimedia Integration Language
- S/MIME - Secure/Multipurpose Internet Mail Extensions
- SMP - Supplementary Multilingual Plane
- SMP - Symmetric Multi-Processing
- SMS - Short Message Service
- SMT - Simultaneous Multithreading
- SMTP - Simple Mail Transfer Protocol
- SNA - Systems Network Architecture
- SNMP - Simple Network Management Protocol
- SOA - Service-Oriented Architecture
- SOAP - Simple Object Access Protocol
- SoC - System-on-a-Chip
- SO-DIMM - Small Outline DIMM
- SOI - Silicon On Insulator
- SP - Service Pack
- SPI - Stateful Packet Inspection
- SPARC - Scalable Processor Architecture
- SQL - Structured Query Language
- SRAM - Static Random Access Memory
- SSD - Software Specification Document
- SSH - Secure Shell
- SSI - Server Side Includes
- SSI - Single-System Image
- SSI - Small-Scale Integration
- SSL - Secure Socket Layer
- SSP - Supplementary Special-purpose Plane
- SUS - Single UNIX Specification
- SVG - Scalable Vector Graphics
- SVGA - Super Video Graphics Array
- SWT - Stardard Widget Toolkit
T
- TAO - Track-At-Once
- TB - Terabyte
- Tcl - Tool Command Language
- TCP - Transmission Control Protocol
- TCP/IP - Transmission Control Protocol/Internet Protocol
- TDMA - Time Division Multiple Access
- 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
- TTA - True Tap Audio
- TTL - Time To Live
- TTY - Teletype
- TUCOWS - The Ultimate Collection of Winsock Software
U
- UART - Universal Asynchronous Receiver Transmitter
- UCS - Universal Character Set
- 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
- UNC - Universal Naming Convention
- 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
- UVC - Universal Virtual Computer
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
- VG - Volume Group
- 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
- VOD - Video On Demand
- VoIP - Voice over IP
- VPN - Virtual Private Network
- VSAM - Virtual Storage Access Method
- VSAT - Very Small Aperture (Satellite) Terminal
- VT - Video Terminal?
- VTAM - Virtual Telecommunications Access Method
W
- W3C - World Wide Web Consortium
- WAFS - Wide Area File Services
- WAIS - Wide Area Information Server
- WAN - Wide Area Network
- WAP - Wireless Access Point
- WAP - Wireless Application Protocol
- WAV - WAVEform audio format
- WBEM - Web-Based Enterprise Management
- WDM - Wavelength Division Multiplexing
- WebDAV - WWW Distributed Authoring and Versioning
- WEP - Wired Equivalent Privacy
- Wi-Fi - Wireless Fidelity
- WiMAX - Worldwide Interoperability for Microwave Access
- WINS- Windows Internet Naming Service
- WMA - Windows Media Audio
- WOL - Wake on LAN
- 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
- XDM - X Window Display Manager
- XDMCP - X Display Manager Control Protocol
- XCBL - XML Common Business Library
- XHTML - eXtensible Hypertext Markup Language
- XML - eXtensible Markup Language
- XMMS - X Multimedia System
- XMPP - eXtensible Messaging and Presence Protocol
- XMS - Extended Memory Specification
- XNS - Xerox Network Services
- XP - Cross Platform (not Windows XP)
- XP - Extreme Programming
- XPCOM - Cross Platform Component Object Model
- XPI - Cross Platform Installer
- XPIDL - Cross Platform IDL
- XSD - XML Schema Definition
- XSL-T - eXtensible Stylesheet Language Transformations
- XSS - Cross Site Scripting
- XT -
- XUL - XML-based User-interface Language
Y
- Y2K - Year Two Thousand
- YACC - Yet Another Compiler Compiler
- YAML - YAML Ain't Markup Language
- YAST - Yet Another Setup Tool
Z
- ZCS - Zero Code Suppression
- ZI - Zero Insertion
- ZIF - Zero Insertion Force
- ZIFS - Zero Insertion Force Socket
- ZOPE - Z Object Publishing Environment
- ZMA - Zone Multicast Address
See also: List of computing and IT abbreviations, .arpa, 2B1Q, 4B5BLF, 8B10BLF, AAA, AABB
