Cybersecurity acronyms Page

Cybersecurity acronyms



Return to Cybersecurity terminology or Acronyms or List of computing and IT abbreviations

This is a list of computing and IT acronyms and IT abbreviations.

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0–9


* Multi-factor authentication|2FA—Two-factor authentication

A


* AAA protocol|AAA—Authentication Authorization, Accounting
* ACID—Atomicity Consistency Isolation Durability
* Acknowledge character|ACK—ACKnowledgement
* Access control list|ACL—Access Control List
* Advanced Configuration and Power Interface|ACPI—Advanced Configuration and Power Interface
* Active Directory|AD—Active Directory
* Administrative domain|AD—Administrative Domain
* Advanced Data Communication Control Procedures|ADCCP—Advanced Data Communications Control Procedures
* Advanced Encryption Standard|AES—Advanced Encryption Standard
* Anisotropic filtering|AF—Anisotropic Filtering
* Artificial intelligence|AI—Artificial Intelligence
* Access list|AL—Access List
* Access method|AM—Access Method
* American National Standards Institute|ANSI—American National Standards Institute
* Application Layer|APCI—Application-Layer Protocol Control Information
* Application programming interface|API—Application Programming Interface
* Zero configuration networking|APIPA—Automatic Private IP Addressing
* American Registry for Internet Numbers|ARIN—American Registry for Internet Numbers
* Address Resolution Protocol|ARP—Address Resolution Protocol
* .arpa|ARPA—Address and Routing Parameter Area
* Advanced Research Projects Agency|ARPA—Advanced Research Projects Agency
* Network access server|AS—Access Server
* AuthIP—Authenticated Internet Protocol
* Automated Security Enhancement Tool|ASET—Automated Security Enhancement Tool
* Application-specific integrated circuit|ASIC—Application-Specific Integrated Circuit
* Application service provider|ASP—Application Service Provider
* Access time|AT—Access Time
* Antivirus software|AV—Antivirus

B


* Block availability map|BAM—Block Availability Map
* Business Continuity|BC—Business Continuity
* Boot Configuration Data|BCD—Boot Configuration Data
* Byzantine fault tolerance|BFT—Byzantine Fault Tolerant
* Business intelligence|BI—Business Intelligence
* BIND—Berkeley Internet Name Domain
* Blog—Web Log
* Basic Multilingual Plane|BMP—Basic Multilingual Plane
* BNC connector|BNC—Bayonet Neill-Concelman
* Berkeley Open Infrastructure for Network Computing|BOINC—Berkeley Open Infrastructure for Network Computing
* Byte order mark|BOM—Byte Order Mark
* Bootstrap Protocol|BOOTP—Bootstrap Protocol
* BPDU—Bridge Protocol Data Unit
* Business Process Execution Language|BPEL—Business Process Execution Language
* Power line communication|BPL—Broadband over Power Lines
* Business Process Management|BPM—Business Process Management
* Business process modeling|BPM—Business Process Modeling
* bit rate|bps—bits per second
* Business reference model|BRM—Business Reference Model
* Business rule management system|BRMS—Business Rule Management System
* Business Readiness Rating|BRR—Business Readiness Rating
* Multichannel Multipoint Distribution Service|BRS—Broadband Radio Service
* Business Software Alliance|BSA—Business Software Alliance
* Back-side bus|BSB—Backside Bus
* Berkeley Software Distribution|BSD—Berkeley Software Distribution
* Blue Screen of Death|BSoD—Blue Screen of Death
* .bss|BSS—Block Started by Symbol
* BitTorrent (protocol)|BT—BitTorrent
* Bluetooth|BT—Bluetooth
* Basic telecommunications access method|B TAM—Basic Telecommunications Access Method
* Bandwidth (computing)|BW—Bandwidth
* Bring your own device|BYOD—Bring Your Own Device
* Byte—By eight (group of 8 bits)
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C


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* Computer architecture|CA—Computer Accountancy
* Computer-aided design|CAD—Computer-Aided Design
* Computer-aided engineering|CAE—Computer-Aided Engineering
* Computer-aided industrial design|CAID—Computer-Aided Industrial Design
* E-learning|CAI—Computer-Aided Instruction
* Computer-aided manufacturing|CAM—Computer-Aided Manufacturing
* CAPTCHA—Completely Automated Public Turing Test to tell Computers and Humans Apart
* Computer-assisted translation|CAT—Computer-Aided Translation
* Computer-aided quality|CAQ—Computer-Aided Quality Assurance
* Computer-aided software engineering|CASE—Computer-Aided Software Engineering
* GNU Compiler Collection|cc—C Compiler
* Compact Disc|CD—Compact Disc
* Common Desktop Environment|CDE—Common Desktop Environment
* Compact Disk File System|CDFS—Compact Disk File System
* Code division multiple access|CDMA—Code Division Multiple Access
* Content delivery network|CDN—Content Delivery Network
* Cisco Discovery Protocol|CDP—Cisco Discovery Protocol
* Continuous data protection|CDP—Continuous Data Protection
* CD-R—CD-Recordable
* CD-ROM—CD Read-Only Memory
* CD-RW—CD-Rewritable
* Computer security#Security architecture|CDSA—Common Data Security Architecture
* Computer Emergency Response Team|CERT—Computer Emergency Response Team
* Consumer Electronics Show|CES—Consumer Electronics Show
* Compact Flash|CF—Compact Flash
* Computational fluid dynamics|CFD—Computational Fluid Dynamics
* Context-free grammar|CFG—Context-Free Grammar
* Control flow graph|CFG—Control Flow Graph
* Computer graphics|CG—Computer Graphics
* Color Graphics Adapter|CGA—Color Graphics Array
* Common Gateway Interface|CGI—Common Gateway Interface
* Computer-generated imagery|CGI—Computer-Generated Imagery
* Graph theory|CGT—Computational Graph Theory
* Challenge-handshake authentication protocol|CHAP—Challenge-Handshake Authentication Protocol
* Cylinder-head-sector|CHS—Cylinder-Head-Sector
* Classless Inter-Domain Routing|CIDR—Classless Inter-Domain Routing
* Server Message Block|CIFS—Common Internet Filesystem
* Common Information Model (computing)|CIM—Common Information Model
* Computationally Independent Model|CIM—Computationally Independent Model
* Chief information officer|CIO—Chief Information Officer
* Committed information rate|CIR—Committed information rate
* Complex instruction set computer|CISC—Complex Instruction Set Computer
* CJK characters|CJK—Chinese, Japanese, and Korean
* CJKV—Chinese, Japanese, Korean, and Vietnamese
* Command-line interface|CLI—Command Line Interface
* Common Language Runtime|CLR—Common Language Runtime
* Configuration management|CM—Configuration Management
* Content management|CM—Content Management
* Configuration management database|CMDB—Configuration Management Database
* Capability Maturity Model Integration|CMMI—Capability Maturity Model Integration
* CMOS—Complementary Metal-Oxide Semiconductor
* Current Mode of Operation|CMO—Current Mode of Operation
* Content management system|CMS—Content Management System
* Active Directory|CN—Canonical Name
* Lightweight Directory Access Protocol|CN—Common Name
* CNC—Computer Numerical Control
* Cryptographic Next Generation|CNG—Cryptographic Next Generation
* Cryptography Next Generation|CNG—Cryptography Next Generation
* Communications and Networking Riser|CNR—Communications and Networking Riser
* COBOL—Common Business-Oriented Language
* Component Object Model|COM—Component Object Model or communication
* Common Object Request Broker Architecture|CORBA—Common Object Request Broker Architecture
* Commercial off-the-shelf|COTS—Commercial Off-The-Shelf
* Cell (microprocessor)|CPA—Cell Processor Architecture
* CPAN—Comprehensive Perl Archive Network
* CP/M—Control Program/Monitor
* Common Public Radio Interface|CPRI—Common Public Radio Interface
* Characters Per Second|CPS—characters per second
* Central processing unit|CPU—Central Processing Unit
* Carriage return|CR—Carriage Return
* R (programming language)|CRAN—Comprehensive R Archive Network
* Cyclic redundancy check|CRC—Cyclic Redundancy Check
* Newline|CRLF—Carriage Return Line Feeds
* Customer relationship management|CRM—Customer Relationship Management
* Computer reservations system|CRS—Computer Reservations System
* Cathode ray tube|CRT—Cathode Ray Tube
* Create, read, update and delete|CRUD—Create, Read, Update and Delete
* AT Attachment|CS—Cable Select
* Computer science|CS—Computer Science
* Computer Science and Engineering|CSE—Computer Science and Engineering
* Common System Interface|CSI—Common System Interface
* Compatibility Support Module|CSM—Compatibility Support Module
* Carrier sense multiple access with collision detection|CSMA/CD—Carrier sense multiple access with collision detection
* Cloud service provider|CSP—Cloud Service Provider
* Communicating sequential processes|CSP—Communicating Sequential Processes
* Cross-site request forgery|CSRF—Cross-Site Request Forgery
* Cascading Style Sheets|CSS—Cascading Style Sheets
* Content Scramble System|CSS—Content-Scrambling System
* Closed source|CSS—Closed Source Software
* Cross-site scripting|CSS—Cross-Site Scripting
* Comma-separated values|CSV—Comma-Separated Values
* Computed axial tomography|CT—Computerized Tomography
* CTAN—Comprehensive TeX Archive Network
* Client-to-client protocol|CTCP—Client-To-Client Protocol
* Computer telephony integration|CTI—Computer Telephony Integration
* Compile time function execution|CTFE—Compile Time Function Execution
* Computation tree logic|CTL—Computational Tree Logic
* Close to Metal|CTM—Close To Metal
* Flow control (data)|CTS—Clear To Send
* Compatible Time-Sharing System|CTSS—Compatible Time-Sharing System
* IBM Common User Access|CUA—Common User Access
* Concurrent Versions System—Concurrent Versioning System|CVS
* Concurrent Versions System|CVS—Concurrent Versioning System
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D


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* Digital-to-analog converter|DAC—Digital-To-Analog Converter
* Discretionary access control|DAC—Discretionary Access Control
* Database Abstraction Layer|DAL—Database Abstraction Layer
* Data access object|DAO—Data Access Object
* Data Access Objects|DAO—Data Access Objects
* Optical disc recording modes|DAO—Disk-At-Once
* Directory Access Protocol|DAP—Directory Access Protocol
* DARPA—Defense Advanced Research Projects Agency
* Digital Audio Tape|DAT—Digital Audio Tape
* Database|DB—Database
* Database administrator|DBA—Database Administrator
* DBCS—Double Byte Character Set
* Database management system|DBMS—Database Management System
* Direct Client-to-Client|DCC—Direct Client-to-Client
* Datagram Congestion Control Protocol|DCCP—Datagram Congestion Control Protocol
* DCC Alliance|DCCA—Debian Common Core Alliance
* Data Control Language|DCL—Data Control Language
* Distributed Control System|DCS—Distributed Control System
* Dublin Core|DCMI—Dublin Core Metadata Initiative
* Distributed Component Object Model|DCOM—Distributed Component Object Model
* Double density|DD—Double Density
* Dynamic Data Exchange|DDE—Dynamic Data Exchange
* DNS DHCP IP Address management|DDI—DNS DHCP & IP Address management
* Data Definition Language|DDL—Data Definition Language
* DDoS—Distributed Denial of Service
* DDR SDRAM|DDR—Double Data Rate
* Digital Equipment Corporation|DEC—Digital Equipment Corporation
* Data Encryption Standard|DES—Data Encryption Standard
* :/dev|dev—development
* Deterministic finite automaton|DFA—Deterministic Finite Automaton
* Data flow diagram|DFD—Data Flow Diagram
* Depth-first search|DFS—Depth-First Search
* Distributed file system|DFS—Distributed File System
* Dworkin's Game Driver|DGD—Dworkin's Game Driver
* Dynamic Host Configuration Protocol|DHCP—Dynamic Host Configuration Protocol
* Dynamic HTML|DHTML—Dynamic Hypertext Markup Language
* Data Integrity Field|DIF—Data Integrity Field
* DIMM—Dual Inline Memory Module
* Deutsches Institut für Normung|DIN—Deutsches Institut für Normung
* Dual in-line package|DIP—Dual In-line Package
* DISM—Deployment Image and Service Management Tool
* DIVX (Digital Video Express)|DIVX—Digital Video Express
* DomainKeys Identified Mail|DKIM—Domain Keys Identified Mail
* Download|DL—Download
* Dynamic-link library|DLL—Dynamic Link Library
* Digital Living Network Alliance|DLNA—Digital Living Network Alliance
* Data loss protection|DLP—Data loss protection
* Direct memory access|DMA—Direct Memory Access
* Digital Millennium Copyright Act|DMCA—Digital Millennium Copyright Act
* Direct Media Interface|DMI—Direct Media Interface
* Data Manipulation Language|DML—Data Manipulation Language
* Definitive Media Library|DML—Definitive Media Library
* Dennis Ritchie|DMR—Dennis M. Ritchie
* DMZ (computing)|DMZ—Demilitarized Zone
* Lightweight Directory Access Protocol|DN—Distinguished Name
* Drag-and-drop|DND—Drag-and-Drop
* Domain Name System|DNS—Domain Name System
* Dead on arrival|DOA—Dead on Arrival
* DOCSIS—Data Over Cable Service Interface Specification
* Document Object Model|DOM—Document Object Model
* Denial-of-service attack|DoS—Denial of Service
* DOS—Disk Operating System
* Dot pitch|DP—Dot Pitch
* Deferred Procedure Call|DPC—Deferred Procedure Call
* Deep packet inspection|DPI—Deep Packet Inspection
* Dots per inch|DPI—Dots Per Inch
* DOS Protected Mode Interface|DPMI—DOS Protected Mode Interface
* VESA Display Power Management Signaling|DPMS—Display Power Management Signaling
* Disaster recovery|DR—Disaster Recovery
* Dynamic random-access memory|DRAM—Dynamic Random-Access Memory
* DR-DOS—Digital Research - Disk Operating System
* Direct Rendering Infrastructure|DRI—Direct Rendering Infrastructure
* Digital rights management|DRM—Digital Rights Management
* Direct Rendering Manager|DRM—Direct Rendering Manager
* Digital Signature Algorithm|DSA—Digital Signature Algorithm
* Document Schema Definition Languages|DSDL—Document Schema Definition Languages
* Dynamic Systems Development Method|DSDM—Dynamic Systems Development Method
* Digital subscriber line|DSL—Digital Subscriber Line
* Domain-specific language|DSL—Domain-Specific Language
* Digital subscriber line access multiplexer|DSLAM—Digital Subscriber Line Access Multiplexer
* Database Source Name|DSN—Database Source Name
* Data set (IBM mainframe)|DSN—Data Set Name
* Digital signal processor|DSP—Digital Signal Processor
* Document Style Semantics and Specification Language|DSSSL—Document Style Semantics and Specification Language
* Document Type Definition|DTD—Document Type Definition
* Data terminal equipment|DTE—Data Terminal Equipment or data transfer rate
* Desktop publishing|DTP—Desktop Publishing
* RS-232|DTR—Data Terminal Ready or Data transfer rate
* DVD—Digital Versatile Disc
* DVD-R—DVD-Recordable
* DVD-ROM—DVD-Read Only Memory
* DVD-RW—DVD-Rewritable
* Digital Visual Interface|DVI—Digital Visual Interface
* Digital video recorder|DVR—Digital Video Recorder
* Data Warehouse|DW—Data Warehouse
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E


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* Enterprise application integration|EAI—Enterprise Application Integration
* Extensible Authentication Protocol|EAP—Extensible Authentication Protocol
* Exchange ActiveSync|EAS—Exchange ActiveSync
* Extended Binary Coded Decimal Interchange Code|EBCDIC—Extended Binary Coded Decimal Interchange Code
* Extensible Binary Meta Language|EBML—Extensible Binary Meta Language
* Elliptic curve cryptography|ECC—Elliptic Curve Cryptography
* Ecma International|ECMA—European Computer Manufacturers Association
* Explicit Congestion Notification|ECN—Explicit Congestion Notification
* eCos|ECOS—Embedded Configurable Operating System
* Expense and Cost Recovery System (ECRS)|ECRS—Expense and Cost Recovery System
* Electronic design automation|EDA—Electronic Design Automation
* Enhanced Data Rates for GSM Evolution|EDGE— Enhanced Data rates for GSM Evolution
* Electronic Data Interchange|EDI—Electronic Data Interchange
* Dynamic random access memory|EDO—Extended Data Out
* Electronic Delay Storage Automatic Calculator|EDSAC—Electronic Delay Storage Automatic Calculator
* EDVAC—Electronic Discrete Variable Automatic Computer
* EEPROM—Electronically Erasable Programmable Read-Only Memory
* Electronic Frontier Foundation|EFF—Electronic Frontier Foundation
* Extensible Firmware Interface|EFI—Extensible Firmware Interface
* Eight-to-fourteen modulation|EFM—Eight-to-Fourteen Modulation
* Ethernet in the First Mile|EFM—Ethernet in the First Mile
* Encrypting File System|EFS—Encrypting File System
* Enhanced Graphics Adapter|EGA—Enhanced Graphics Array
* Electronic mail|E-mail—Electronic mail
* Exterior Gateway Protocol|EGP—Exterior Gateway Protocol
* Electronic identity card|eID—electronic ID card
* EIDE—Enhanced IDE
* Enhanced Interior Gateway Routing Protocol|EIGRP—Enhanced Interior Gateway Routing Protocol
* Extended Industry Standard Architecture|EISA—Extended Industry Standard Architecture
* Extremely low frequency|ELF—Extremely Low Frequency
* Executable and Linkable Format|ELF—Executable and Linkable Format
* Elm (e-mail client)|ELM—ELectronic Mail
* Emacs|EMACS—Editor MACroS
* Expanded memory|EMS—Expanded Memory Specification
* ENIAC—Electronic Numerical Integrator And Computer
* End-of-Day|EOD—End of Day
* End-of-file|EOF—End of File
* Newline|EOL—End of Line
* End of Message|EOM—End Of Message
* End of Support|EOS—End OF Support
* Explicitly parallel instruction computing|EPIC—Explicitly Parallel Instruction Computing
* EPROM—Erasable Programmable Read-Only Memory
* Entity-relationship diagram|ERD—Entity-Relationship Diagram
* Entity-relationship model|ERM—Entity-Relationship Model
* Enterprise resource planning|ERP—Enterprise Resource Planning
* external SATA|eSATA—external SATA
* Enterprise service bus|ESB—Enterprise service bus
* ESCON—Enterprise Systems Connection
* Electrostatic discharge|ESD—Electrostatic Discharge
* Eric S. Raymond|ESR—Eric Steven Raymond
* Extract, transform, load|ETL—Extract, Transform, Load
* Event Tracing for Windows|ETW—Event Tracing for Windows
* Extended Unix Code|EUC—Extended Unix Code
* End user license agreement|EULA—End User License Agreement
* Extended Window Manager Hints|EWMH—Extended Window Manager Hints
* Extended file system|EXT—EXTended file system
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F


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* FORTRAN Assembly Program|FAP—FORTRAN Assembly Program
* FASM—Flat ASseMbler
* File Allocation Table|FAT—File Allocation Table
* FAQ—Frequently Asked Questions
* Fully Buffered DIMM|FBDIMM—Fully Buffered Dual Inline Memory Module
* FC-AL—Fibre Channel Arbitrated Loop
* File control block|FCB—File Control Block
* Frame check sequence|FCS—Frame Check Sequence
* Floppy disk controller|FDC—Floppy Disk Controller
* Fedora Directory Server|FDS—Fedora Directory Server
* Frequency-division multiple access|FDD—Frequency-Division Duplexing
* Floppy disk drive|FDD—Floppy Disk Drive
* Fiber distributed data interface|FDDI—Fiber Distributed Data Interface
* Frequency-division multiplexing|FDM—Frequency-Division Multiplexing
* Frequency-division multiple access|FDMA—Frequency-Division Multiple Access
* Forward error correction|FEC—Forward Error Correction
* S-LINK|FEMB—Front-End Motherboard
* Field-effect transistor|FET—Field Effect Transistor
* Filesystem Hierarchy Standard|FHS—Filesystem Hierarchy Standard
* FICON—FIber CONnectivity
* FIFO (computing and electronics)|FIFO—First In First Out
* FIPS 140|FIPS—Federal Information Processing Standards
* FL (programming language)|FL—Function Level
* Free Lossless Audio Codec|FLAC—Free Lossless Audio Codec
* FLOPS—FLoating-Point Operations Per Second
* Free and open source software|FLOSS—Free/Libre/Open Source Software
* Fixed Mobile Convergence|FMC— Fixed Mobile Convergence "Mobile UC or Unified Communications over Wireless"
* Future Mode of Operation|FMO—Future Mode of Operation
* Free On-line Dictionary of Computing|FOLDOC—Free On-line Dictionary of Computing
* FOSDEM—Free and Open source Software Developers' European Meeting
* Formatting Output Specification Instance|FOSI—Formatted Output Specification Instance
* Free and open source software|FOSS—Free and Open Source Software
* FP (programming language)|FP—Function Programming
* Field-programmable gate array|FPGA—Field Programmable Gate Array
* Floating Point Systems|FPS—Floating Point Systems
* Floating-point unit|FPU—Floating Point Unit
* Field-replaceable unit|FRU—Field Replaceable Unit
* File system|FS—File System
* Front-side bus|FSB—Front Side Bus
* fsck—File System Check
* Free Software Foundation|FSF—Free Software Foundation
* Finite-state machine|FSM—Finite State Machine
* Fiber to the Antenna|FTTA—Fiber To The Antenna
* Fiber to the Curb|FTTC—Fiber To The Curb
* Fiber to the home|FTTH—Fiber To The Home
* Fiber to the premises|FTTP—Fiber To The Premises
* File Transfer Protocol|FTP—File Transfer Protocol
* Fully qualified domain name|FQDN—Fully Qualified Domain Name
* Fear, uncertainty and doubt|FUD—Fear Uncertainty Doubt
* Whitespace (computer science)|FWS—Folding White Space
* File eXchange Protocol|FXP—File eXchange Protocol
* For Your Information|FYI—For Your Information
* FVEK—Full Volume Encryption Key
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G


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* Globalization|G11N—Globalization
* GNU Assembler|Gas—GNU Assembler
* Gigabit|Gb—Gigabit
* Gigabyte|GB—Gigabyte
* GNU Compiler Collection|GCC—GNU Compiler Collection
* GNU Compiler for Java|GCJ—GNU Compiler for Java
* Group coded recording|GCR—Group Coded Recording
* GNU Debugger|GDB—GNU Debugger
* Graphics Device Interface|GDI—Graphics Device Interface
* GNU Free Documentation License|GFDL—GNU Free Documentation License
* Graphics Interchange Format|GIF—Graphics Interchange Format
* Garbage In, Garbage Out|GIGO—Garbage In, Garbage Out
* GIMP—GNU Image Manipulation Program
* Great Internet Mersenne Prime Search|GIMPS—Great Internet Mersenne Prime Search
* Geographic information system|GIS—Geographic Information System
* OpenGL Utility Toolkit|GLUT—OpenGL Utility Toolkit
* Geography Markup Language|GML—Geography Markup Language
* GNOME—GNU Network Object Model Environment
*GUI-Graphical User Interfase
*GNU—GNU's Not Unix
* GOMS—Goals, Operators, Methods, and Selection rules
* GPUTILS|GPASM—GNU PIC ASseMbler
* IBM General Parallel File System|GPFS—General Parallel File System
* GNU Privacy Guard|GPG—GNU Privacy Guard
* GPGPU—General-Purpose Computing on Graphics Processing Units
* GPIB—General-Purpose Instrumentation Bus
* GNU General Public License|GPL—General Public License
* Domain-specific language|GPL—General-Purpose Language
* General Packet Radio Service|GPRS—General Packet Radio Service
* GUID Partition Table|GPT—GUID Partition Table
* Graphics processing unit|GPU—Graphics Processing Unit
* GNU GRUB|GRUB—Grand Unified Boot-Loader
* GERAN—GSM EDGE Radio Access Network
* GSM—Global System for Mobile Communications
* GTK+—GIMP Toolkit
* Graphical user interface|GUI—Graphical User Interface
* Globally Unique Identifier|GUID—Globally Unique IDentifier
* Google Web Toolkit|GWT—Google Web Toolkit
* IT Networking Services|GYR—IT Networking
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H


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* High availability|HA—High Availability
* Hardware abstraction layer|HAL—Hardware Abstraction Layer
* HTML Application Rapid Development|HARD—HTML Application Rapid Development
* Houston Automatic Spooling Priority|HASP—Houston Automatic Spooling Priority
* Host adapter|HBA—Host Bus Adapter
* Human–computer interaction|HCI—Human Computer Interaction
* High density|HD—High Density
* Hard disk drive|HDD—Hard Disk Drive
* Hardware compatibility list|HCL—Hardware Compatibility List
* HD DVD—High Definition DVD
* Hardware description language|HDL—Hardware Description Language
* HDMI—High-Definition Multimedia Interface
* HECI—Host Embedded Controller Interface
* High frequency|HF—High Frequency
* Hierarchical File System|HFS—Hierarchical File System
* Hybrid drive|HHD—Hybrid Hard Drive
* Human interface device|HID—Human Interface Device
* Human interface guidelines|HIG—Human Interface Guidelines
* GNU Hurd|HIRD—Hurd of Interfaces Representing Depth
* IBM High-Level Assembler|HLASM—High Level ASseMbler
* HTTP Live Streaming|HLS—HTTP Live Streaming
* High memory area|HMA—High Memory Area
* Hewlett-Packard|HP—Hewlett-Packard
* High-performance computing|HPC—High-Performance Computing
* High Performance File System|HPFS—High Performance File System
* High-Speed Downlink Packet Access|HSDPA—High-Speed Downlink Packet Access
* High-throughput computing|HTC—High-Throughput Computing
* Hierarchical storage management|HSM—Hierarchical Storage Management
* Hyper-threading|HT—Hyper Threading
* Hierarchical temporal memory|HTM—Hierarchical Temporal Memory
* HTML—Hypertext Markup Language
* Hypertext Transfer Protocol|HTTP—Hypertext Transfer Protocol
* Daemon (computer software)|HTTPd—Hypertext Transport Protocol Daemon
* HTTPS—HTTP Secure
* HyperTransport|HTX—HyperTransport eXpansion
* GNU Hurd|HURD—Hird of Unix-Replacing Daemons
* Holographic Versatile Disc|HVD—Holographic Versatile Disc
* Hertz|Hz—Hertz{{div col end}}

I


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* I²C—Inter-Integrated Circuit
* I²S—Integrated Interchip Sound
* Internationalization and localization|I18N—Internationalization
* Internet Assigned Numbers Authority|IANA—Internet Assigned Numbers Authority
* Application binary interface|iBCS—Intel Binary Compatibility Standard
* IBM—International Business Machines
* Integrated circuit|IC—Integrated Circuit
* ICANN—Internet Corporation for Assigned Names and Numbers
* In-circuit emulator|ICE—In-Circuit Emulator
* Intrusion Countermeasures Electronics|ICE—Intrusion Countermeasure Electronics
* I/O Controller Hub|ICH—I/O Controller Hub
* Internet Control Message Protocol|ICMP—Internet Control Message Protocol
* Internet Cache Protocol|ICP—Internet Cache Protocol
* Internet Connection Sharing|ICS—Internet Connection Sharing
* Information technology|ICT—Information and Communication Technology
* Integrated development environment|IDE—Integrated Development Environment
* Advanced Technology Attachment|IDE—Integrated Drive Electronics
* Intermediate distribution frame|IDF—Intermediate Distribution Frame
* Intermediate Data Format|IDF—Intermediate Data Format
* IDL (programming language)|IDL—Interactive Data Language
* Interface description language|IDL—Interface Definition Language
* Intrusion detection system|IDS—Intrusion Detection System
* Internet Explorer|IE—Internet Explorer
* International Electrotechnical Commission|IEC—International Electrotechnical Commission
* Institute of Electrical and Electronics Engineers|IEEE—Institute of Electrical and Electronics Engineers
* Internet Engineering Task Force|IETF—Internet Engineering Task Force
* IFGICT—International Federation of Global & Green ICT
* Integrated Facility for Linux|IFL—Integrated Facility for Linux
* Internet Group Management Protocol|IGMP—Internet Group Management Protocol
* Interior Gateway Routing Protocol|IGRP—Interior Gateway Routing Protocol
* Independent hardware vendor|IHV—Independent Hardware Vendor
* General Inter-ORB Protocol|IIOP—Internet Inter-Orb Protocol
* Internet Information Services|IIS—Internet Information Services
* Internet Key Exchange|IKE—Internet Key Exchange
* Intermediate language|IL—Intermediate Language
* Instant messaging|IM—Instant Messaging
* Internet Message Access Protocol|IMAP—Internet Message Access Protocol
* Input method editor|IME—Input Method Editor
* Information security|INFOSEC—Information Systems Security
* Input/output|I/O—Input/output
* Internet of Things|IoT—Internet of Things
* Intellectual property|IP—Intellectual Property
* Internet Protocol|IP—Internet Protocol
* IP address management|IPAM—IP Address Management
* Inter-process communication|IPC—Inter-Process Communication
* Initial Program Load|IPL—Initial Program Load
* Intelligent Platform Management Interface|IPMI—Intelligent Platform Management Interface
* Interprocedural optimization|IPO—Inter Procedural Optimization
* Internet Printing Protocol|IPP—Internet Printing Protocol
* IPS panel|IPS—In-Plane Switching
* Instructions per second|IPS—Instructions Per Second
* Intrusion prevention system|IPS—Intrusion Prevention System
* IPsec—Internet Protocol security
* IPTV—Internet Protocol Television
* IPv4—Internet Protocol version 4
* IPv6—Internet Protocol version 6
* Internetwork Packet Exchange|IPX—Internetwork Packet Exchange
* Intermediate language|IR—Intermediate Representation
* Internet Relay Chat|IRC—Internet Relay Chat
* Infrared Data Association|IrDA—Infrared Data Association
* Internationalized Resource Identifier|IRI—Internationalized Resource Identifier
* I/F—Interface
* I/O request packet|IRP—I/O Request Packet
* Interrupt request|IRQ—Interrupt Request
* Information systems|IS—Information Systems
* IS-IS—Intermediate System to Intermediate System
* Industry Standard Architecture|ISA—Industry Standard Architecture
* Instruction set|ISA—Instruction Set Architecture
* ISAM—Indexed Sequential Access Method
* ISATAP—Intra-Site Automatic Tunnel Addressing Protocol
* Internet Storm Center|ISC—Internet Storm Center
* iSCSI—Internet Small Computer System Interface
* Integrated services digital network|ISDN—Integrated Services Digital Network
* International Organization for Standardization|ISO—International Organization for Standardization
* Internet Storage Name Service|iSNS—Internet Storage Name Service
* Internet service provider|ISP—Internet Service Provider
* ISPF—Interactive System Productivity Facility
* Interrupt handler|ISR—Interrupt Service Routine
* Independent software vendor|ISV—Independent Software Vendor
* Information technology|IT—Information Technology
* Information Technology Infrastructure Library|ITIL—Information Technology Infrastructure Library
* Interval temporal logic|ITL—Interval Temporal Logic
* International Telecommunication Union|ITU—International Telecommunication Union
* Interactive voice response|IVRS—Interactive Voice Response System
* Interactive Virtual Classroom|IVCR—Interactive Virtual Classroom
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J


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* Java Platform, Enterprise Edition|J2EE—Java 2 Enterprise Edition
* Java Platform, Micro Edition|J2ME—Java 2 Micro Edition
* Java Platform, Standard Edition|J2SE—Java 2 Standard Edition
* Java Architecture for XML Binding|JAXB—Java Architecture for XML Binding
* Java API for XML-based RPC|JAX-RPC—Java XML for Remote Procedure Calls
* Java API for XML Processing|JAXP—Java API for XML Processing
* JBOD—Just a Bunch of Disks
* Java Cryptography Extension|JCE{{mdash}} Java Cryptography Extension
* Job Control Language|JCL—Job Control Language
* Java Community Process|JCP—Java Community Process
* Java Database Connectivity|JDBC—Java Database Connectivity
* Java Development Kit|JDK—Java Development Kit
* Java Platform, Enterprise Edition|JEE—Java Enterprise Edition
* Job Entry Subsystem 2/3|JES—Job Entry Subsystem
* Java Desktop System|JDS—Java Desktop System
* Java Foundation Classes|JFC—Java Foundation Classes
* JFET—Junction Field-Effect Transistor
* JFS (file system)|JFS—IBM Journaling File System
* Jini|JINI—Jini Is Not Initials
* Just-in-time compilation|JIT—Just-In-Time
* Java Platform, Micro Edition|JME—Java Micro Edition
* Java Management Extensions|JMX—Java Management Extensions
* Java Message Service|JMS—Java Message Service
* Java Naming and Directory Interface|JNDI—Java Naming and Directory Interface
* Java Native Interface|JNI—Java Native Interface
* Instruction set|JNZ—Jump non-zero
* JPEG—Joint Photographic Experts Group
* Java Runtime Environment|JRE—Java Runtime Environment
* JavaScript|JS—JavaScript
* Java Platform, Standard Edition|JSE—Java Standard Edition
* JSON—JavaScript Object Notation
* Jackson Structured Programming|JSP—Jackson Structured Programming
* JavaServer Pages|JSP—JavaServer Pages
* Joint Test Action Group|JTAG—Joint Test Action Group
* Java User Group|JUG—Java Users Group
* Java Virtual Machine|JVM—Java Virtual Machine
{{div col end}}

K


{{div col|colwidth=22em}}
* The C Programming Language (book)|K&R—Kernighan and Ritchie
* Keyboard (computing)|KB—Keyboard
* Kilobit|Kb—Kilobit
* Kilobyte|KB—Kilobyte
* Knowledge base|KB—Knowledge Base
* Kibibyte|KiB—Kibibyte
* KDE—K Desktop Environment
* Kilohertz|kHz—Kilohertz
* KM—Knowledge Machine
* KRL (programming language)|KRL—Knowledge Representation Language
* KVM switch|KVM—Keyboard, Video, Mouse
{{div col end}}

L


{{div col|colwidth=22em}}
* Internationalization and localization|L10N—Localization
* Layer 2 Tunneling Protocol|L2TP—Layer two Tunneling Protocol
* Link Aggregation Control Protocol|LACP—Link Aggregation Control Protocol
* LAMP (software bundle)|LAMP—Linux Apache MySQL Perl
* LAMP (software bundle)|LAMP—Linux Apache MySQL PHP
* LAMP (software bundle)|LAMP—Linux Apache MySQL Python
* Local area network|LAN—Local Area Network
* Logical block addressing|LBA—Logical Block Addressing
* Load balancing (computing)|LB—Load Balancer
* Liquid crystal display|LCD—Liquid Crystal Display
* Least Cost Routing|LCR—Least Cost Routing
* Liquid crystal on silicon|LCOS—Liquid Crystal On Silicon
* Lightweight Directory Access Protocol|LDAP—Lightweight Directory Access Protocol
* Logical volume management|LE—Logical Extents
* Light-emitting diode|LED—Light-Emitting Diode
* Line feed|LF—Line Feed
* Low frequency|LF—Low Frequency
* Linux From Scratch|LFS—Linux From Scratch
* GNU Lesser General Public License|LGPL—Lesser General Public License
* Library (computing)|LIB—LIBrary
* Low insertion force|LIF—Low Insertion Force
* LIFO (computing)|LIFO—Last In First Out
* LILO (boot loader)|LILO—Linux Loader
* Lisp (programming language)|LISP—LISt Processing
* Linux kernel mailing list|LKML—Linux Kernel Mailing List
* LAN Manager|LM—Lan Manager
* Source lines of code|LOC—Lines of Code
* LPC (programming language)|LPC—Lars Pensjö C
* Linux Professional Institute|LPI—Linux Professional Institute
* Parallel port|LPT{{mdash}} Line Print Terminal
* Least Recently Used|LRU—Least Recently Used
* Least significant bit|LSB—Least Significant Bit
* Linux Standard Base|LSB—Linux Standard Base
* Large Scale Integration|LSI—Large-Scale Integration
* Long Term Evolution|LTE—Long Term Evolution
* Linear temporal logic|LTL—Linear Temporal Logic
* Bi-directional text|LTR—Left-to-Right
* Linux User Group|LUG—Linux User Group
* Logical Unit Number|LUN—Logical Unit Number
* Logical volume management|LV—Logical Volume
* Low-voltage differential signaling|LVD—Low Voltage Differential
* Logical volume management|LVM—Logical Volume Management
* Lempel–Ziv–Welch|LZW—Lempel-Ziv-Welch
* Land Grid Array|LGA—Land Grid Array
{{div col end}}

M


{{div col|colwidth=22em}}
* Mandatory access control|MAC—Mandatory Access Control
* Media Access Control|MAC—Media Access Control
* Metropolitan area network|MAN—Metropolitan Area Network
* Mobile ad hoc network|MANET—Mobile Ad-Hoc Network
* Messaging Application Programming Interface|MAPI—Messaging Application Programming Interface
* Megabit|Mb—Megabit
* Megabyte|MB—Megabyte
* Multi-byte character set|MBCS—Multi Byte Character Set
* Model-based design|MBD—Model-Based Design
* Master boot record|MBR—Master Boot Record
* Micro Channel architecture|MCA—Micro Channel Architecture
* Microsoft Certified Professional|MCA—Microsoft Certified Architect
* Microsoft Certified Professional#Microsoft Certified Application Developer or M.C.A.D.|MCAD—Microsoft Certified Application Developer
* Microsoft Certified Professional#Microsoft Certified Application Specialist or M.C.A.S.|MCAS—Microsoft Certified Application Specialist
* MCDBA—Microsoft Certified DataBase Administrator
* Microsoft Certified Professional#Microsoft Certified Desktop Support Technician or M.C.D.S.T.|MCDST—Microsoft Certified Desktop Support Technician
* Microsoft Certified Professional|MCITP—Microsoft Certified Information Technology Professional
* Microsoft Certified Professional|MCM—Microsoft Certified Master
* Microsoft Certified Professional|MCP—Microsoft Certified Professional
* Multiple Channels Per Carrier |MCPC—Multiple Channels Per Carrier
* Microsoft Certified Professional|MCPD—Microsoft Certified Professional Developer
* Microsoft Certified Professional#Microsoft Certified Systems Administrator or M.C.S.A.|MCSA—Microsoft Certified Systems Administrator
* Microsoft Certified Professional#Microsoft Certified Solution Developer or M.C.S.D.|MCSD—Microsoft Certified Solution Developer
* Microsoft Certified Professional#Microsoft Certified Systems Engineer or M.C.S.E.|MCSE—Microsoft Certified Systems Engineer
* Microsoft Certified Professional#Microsoft Certified Trainer or M.C.T.|MCT—Microsoft Certified Trainer
* Microsoft Certified Professional|MCTS—Microsoft Certified Technology Specialist
* Mail delivery agent|MDA—Mail Delivery Agent
* Model-driven architecture|MDA—Model-Driven Architecture
* IBM Monochrome Display Adapter|MDA—Monochrome Display Adapter
* Model-driven software development|MDD/MDSD—Model-Driven (Software) Development
* Main distribution frame|MDF—Main Distribution Frame
* Multiple document interface|MDI—Multiple Document Interface
* Microsoft Edge|ME—Microsoft Edge
* Windows Me|ME—[Windows] Millennium Edition
* Medium frequency|MF—Medium Frequency
* Microsoft Foundation Class Library|MFC—Microsoft Foundation Classes
* Modified Frequency Modulation|MFM—Modified Frequency Modulation
* Media Gateway Control Protocol|MGCP—Media Gateway Control Protocol
* Megahertz|MHz—Megahertz
* Management information base|MIB—Management Information Base
* Magnetic ink character recognition|MICR—Magnetic Ink Character Recognition
* Musical Instrument Digital Interface|MIDI—Musical Instrument Digital Interface
* MIMD—Multiple Instruction, Multiple Data
* MIMO—Multiple-Input Multiple-Output
* MINIX—MIni-uNIX
* Million instructions per second|MIPS—Million Instructions Per Second
* MIPS architecture|MIPS—Microprocessor without Interlocked Pipeline Stages
* Management information system|MIS—Management Information Systems
* MISD—Multiple Instruction, Single Data
* Massachusetts Institute of Technology|MIT—Massachusetts Institute of Technology
* MIME—Multipurpose Internet Mail Extensions
* Multichannel Multipoint Distribution Service|MMDS—Multichannel Multipoint Distribution Service
* Mortality Medical Data System|MMDS—Mortality Medical Data System
* Man-machine interface|MMI—Man Machine Interface.
* Memory-mapped I/O|MMIO—Memory-Mapped I/O
* Massively multiplayer online role-playing game|MMORPG—Massively Multiplayer Online Role-Playing Game
* Microsoft Management Console|MMC— Microsoft Management Console
* Multi-mode optical fiber|MMF—Multi-Mode (optical) Fiber
* Memory management unit|MMU—Memory Management Unit
* MMX (instruction set)|MMX—Multi-Media Extensions
* Multiple-image Network Graphics|MNG—Multiple-image Network Graphics
* Motherboard|MoBo—Motherboard
* Message-oriented middleware|MOM—Message-Oriented Middleware
* MOO—MUD Object Oriented
* Metaobject protocol|MOP—Meta-Object Protocol
* Microsoft Certified Professional#Microsoft Office Specialist or M.O.S.|MOS—Microsoft Office Specialist
* MOSFET—Metal-Oxide Semiconductor Field Effect Transistor
* Motd (Unix)|MOTD—Message Of The Day
* Microsoft Certified Professional|MOUS—Microsoft Office User Specialist
* QuickTime File Format|MOV—Apple QuickTime Multimedia File
* Motion Picture Association of America|MPAA—Motion Picture Association of America
* Moving Picture Experts Group|MPEG—Motion Pictures Experts Group
* Mozilla Public License|MPL—Mozilla Public License
* Multiprotocol Label Switching|MPLS—Multiprotocol Label Switching
* Microprocessor|MPU—Microprocessor Unit
* USB flash drive|MS—Memory Stick
* Microsoft|MS—Microsoft
* Most significant bit|MSB—Most Significant Bit
* Microsoft Network|MSN—Microsoft Network
* MS-DOS—Microsoft DOS
* Machine translation|MT—Machine Translation
* Message transfer agent|MTA—Mail Transfer Agent
* Microsoft Certified Professional|MTA—Microsoft Technology Associate
* MTBF—Mean Time Between Failures
* Maximum transmission unit|MTU—Maximum Transmission Unit
* Mail submission agent|MSA—Mail Submission Agent
* Microsoft Developer Network|MSDN—Microsoft Developer Network
* Integrated circuit#MSI|MSI—Medium-Scale Integration
* Message Signaled Interrupts|MSI—Message Signaled Interrupt
* Windows Installer|MSI—Microsoft Installer
* Mail User Agent|MUA—Mail User Agent
* MUD—Multi-User Dungeon
* Model–view–controller|MVC—Model-View-Controller
* Microsoft Most Valuable Professional|MVP—Most Valuable Professional
* MVS—Multiple Virtual Storage
* Mobile World Congress|MWC—Mobile World Congress
* MX record|MX—Mail exchange
* Material Exchange Format|MXF—Material Exchange Format
{{div col end}}

N


{{div col|colwidth=22em}}
* Negative-acknowledge character|NACK—Negative ACKnowledgement
* Negative-acknowledge character|NAK—Negative AcKnowledge Character
* NaN—Not a Number
* Network Access Protection|NAP—Network Access Protection
* Network-attached storage|NAS—Network-Attached Storage
* Netwide Assembler|NASM—Netwide ASseMbler
* Network address translation|NAT—Network Address Translation
* NetWare Core Protocol|NCP—NetWare Core Protocol
* Native Command Queuing|NCQ—Native Command Queuing
* National Center for Supercomputing Applications|NCSA—National Center for Supercomputing Applications
* Network Driver Interface Specification|NDIS—Network Driver Interface Specification
* Novell Embedded Systems Technology|NDPS—Novell Distributed Print Services
* Novell Directory Services|NDS—Novell Directory Services
* Network Equipment Provider|NEP—Network Equipment Provider
* NetBIOS—Network Basic Input/Output System
* NetBIOS over TCP/IP|NetBT—NetBIOS over TCP/IP
* Near end crosstalk|NEXT—Near-End CrossTalk
* Nondeterministic finite automaton|NFA—Nondeterministic Finite Automaton
* Near field communication|NFC—Near field communication
* Network File System (protocol)|NFS—Network File System
* NGL—aNGeL
* Next-Generation Secure Computing Base|NGSCB—Next-Generation Secure Computing Base
* National Instruments|NI—National Instruments
* Network interface controller|NIC—Network Interface Controller
* No Internal Message|NIM—No Internal Message
* Non-blocking I/O (Java)|NIO—Non-blocking I/O
* National Institute of Standards and Technology|NIST—National Institute of Standards and Technology
* Natural language processing|NLP—Natural Language Processing
* Internationalization and localization|NLS—Native Language Support
* Non-maskable interrupt|NMI—Non-Maskable Interrupt
* Network News Transfer Protocol|NNTP—Network News Transfer Protocol
* Network operations center|NOC—Network Operations Center
* NOP—No OPeration
* Network operating system|NOS—Network Operating System
* NP (complexity)|NP—Nondeterministic Polynomial time
* Netscape Public License|NPL—Netscape Public License
* Native POSIX Thread Library|NPTL—Native POSIX Thread Library
* Network Processing Unit|NPU—Network Processing Unit
* Netscape|NS—Netscape
* Network Security Appliance|NSA—Network Security Appliance
* Network Service Interface|NSI—Network Service Interface
* Netscape Portable Runtime|NSPR—Netscape Portable Runtime
* Novell Storage Services|NSS—Novell Storage Service
* Network Security Services|NSS—Network Security Services
* Name Service Switch|NSS—Name Service Switch
* Windows NT|NT—New Technology
* NTFS—NT Filesystem
* NTLM—NT Lan Manager
* Network Time Protocol|NTP—Network Time Protocol
* Non-Uniform Memory Access|NUMA—Non-Uniform Memory Access
* Non-uniform rational B-spline|NURBS—Non-Uniform Rational B-Spline
* Network Video Recorder|NVR—Network Video Recorder
* Non-volatile random access memory|NVRAM—Non-Volatile Random Access Memory
{{div col end}}

O


{{div col|colwidth=22em}}
* OASIS (organization)|OASIS—Organization for the Advancement of Structured Information Standards
* Operational Acceptance Testing|OAT—Operational Acceptance Testing
* OBSAI—Open Base Station Architecture Initiative
* Open Database Connectivity|ODBC—Open Database Connectivity
* Original equipment manufacturer|OEM—Original Equipment Manufacturer
* Open Enterprise Server|OES—Open Enterprise Server
* Orthogonal Frequency Division Multiplexing|OFDM—Orthogonal Frequency Division Multiplexing
* Open and Free Technology Community|OFTC—Open and Free Technology Community
* Object identifier|OID—Object Identifier
* Online analytical processing|OLAP—Online Analytical Processing
* Object Linking and Embedding|OLE—Object Linking and Embedding
* Organic light-emitting diode|OLED—Organic Light Emitting Diode
* One Laptop per Child|OLPC—One Laptop per Child
* Online transaction processing|OLTP—Online Transaction Processing
* Relocatable Object Module Format|OMF—Object Module Format
* Object Management Group|OMG—Object Management Group
* Optical Mark Recognition|OMR—Optical Mark Reader
* Object-oriented programming|OO—Object-Oriented
* OpenOffice.org|OO—OpenOffice
* Out-of-order execution|OOE—Out-of-Order Execution
* Out of memory|OOM—Out Of Memory
* OpenOffice.org|OOo—OpenOffice.org
* Out-of-order execution|OoOE—Out-of-Order Execution
* Object-oriented programming|OOP—Object-Oriented Programming
* Out of the box (feature)|OOTB—Out of the box
* OPML—Outline Processor Markup Language
* Object request broker|ORB—Object Request Broker
* Object-relational mapping|ORM—Object-Relational Mapping
* Open source|OS—Open Source
* Operating system|OS—Operating System
* O'Reilly Open Source Convention|OSCON—O'Reilly Open Source CONvention
* OSDN—Open Source Development Network
* Open Source Initiative|OSI—Open Source Initiative
* Open Systems Interconnection|OSI—Open Systems Interconnection
* Open Shortest Path First|OSPF—Open Shortest Path First
* Open Sound System|OSS—Open Sound System
* Open source software|OSS—Open-Source Software
* Operations support system|OSS—Operations Support System
* Open Source Technology Group|OSTG—Open Source Technology Group
* Organizationally Unique Identifier|OUI—Organisationally Unique Identifier
{{div col end}}

P


{{div col|colwidth=22em}}
* Peer-to-peer|P2P—Peer-To-Peer
* Platform as a service|PaaS—Platform as a Service
* Personal area network|PAN—Personal Area Network
* Password authentication protocol|PAP—Password Authentication Protocol
* PARC (company)|PARC—Palo Alto Research Center
* Parallel ATA|PATA—Parallel ATA
* Portable Batch System|PBS—Portable Batch System
* Personal computer|PC—Personal Computer
* Printed circuit board|PCB—Printed Circuit Board
* Process control block|PCB—Process Control Block
* IBM PC DOS|PC DOS—Personal Computer Disc Operating System
* Peripheral Component Interconnect|PCI—Peripheral Component Interconnect
* PCI Express|PCIe—PCI Express
* PCI Extended|PCI-X—PCI Extended
* Printer Command Language|PCL—Printer Command Language
* Personal Computer Memory Card International Association|PCMCIA—Personal Computer Memory Card International Association
* Pulse-code modulation|PCM—Pulse-Code Modulation
* Perl Compatible Regular Expressions|PCRE—Perl Compatible Regular Expressions
* Public domain|PD—Public Domain
* Personal digital assistant|PDA—Personal Digital Assistant
* Portable Document Format|PDF—Portable Document Format
* Plesiochronous Digital Hierarchy|PDH—Plesiochronous Digital Hierarchy
* Programmed Data Processor|PDP—Programmed Data Processor
* Logical volume management|PE—Physical Extents
* Perl|PERL—Practical Extraction and Reporting Language
* Please Find Atachment|PFA—Please Find Attachment
* Peripheral Gateway|PG—Peripheral Gateway
* Pin grid array|PGA—Pin Grid Array
* Field-programmable gate array|PGA—Programmable Gate Array
* Profile-guided optimization|PGO—Profile-Guided Optimization
* Pretty Good Privacy|PGP—Pretty Good Privacy
* PHP—Hypertext Preprocessor
* PIC microcontroller|PIC—Peripheral Interface Controller
* Programmable Interrupt Controller|PIC—Programmable Interrupt Controller
* PID controller|PID—Proportional-Integral-Derivative
* Process identifier|PID—Process ID
* Personal information manager|PIM—Personal Information Manager
* Pine (e-mail client)|PINE—Program for Internet News and Email
* Platform Independent Model|PIM—Platform Independent Model
* Programmed input/output|PIO—Programmed Input/Output
* PKCS—Public Key Cryptography Standards
* Public key infrastructure|PKI—Public Key Infrastructure
* Power line communication|PLC—Power Line Communication
* Programmable logic controller|PLC—Programmable Logic Controller
* Programmable logic device|PLD—Programmable Logic Device
* PL/I—Programming Language One
* PL/M—Programming Language for Microcomputers
* PL/P—Programming Language for Prime
* Power line communication|PLT—Power Line Telecommunications
* Power-on self-test|PMM—POST Memory Manager
* Portable Network Graphics|PNG—Portable Network Graphics
* Plug and play|PnP—Plug-and-Play
* Peer Name Resolution Protocol|PNRP—Peer Name Resolution Protocol
* Power over Ethernet|PoE—Power over Ethernet
* Persistent Object Identifier|POID—Persistent Object Identifier
* Plain Old Java Object|POJO—Plain Old Java Object
* Point of presence|POP—Point of Presence
* Post Office Protocol|POP3—Post Office Protocol v3
* POSIX—Portable Operating System Interface, formerly IEEE-IX
* Power-on self-test|POST—Power-On Self Test
* PowerPC|PPC—PowerPC
* Pixels per inch|PPI—Pixels Per Inch
* Point-to-Point Protocol|PPP—Point-to-Point Protocol
* Point-to-Point Protocol over ATM|PPPoA—PPP over ATM
* Point-to-Point Protocol over Ethernet|PPPoE—PPP over Ethernet
* Point-to-point tunneling protocol|PPTP—Point-to-Point Tunneling Protocol
* Pull request|PR—Pull Request
* PostScript|PS—PostScript
* IBM Personal System/2|PS/2—Personal System/2
* Professional Services Automation|PSA—Professional Services Automation
* Platform Specific Model|PSM—Platform Specific Model
* Power supply|PSU—Power Supply Unit
* PSVI—Post-Schema-Validation Infoset
* PTS-DOS—PhysTechSoft - Disk Operating System
* Logical volume management|PV—Physical Volume
* Logical volume management|PVG—Physical Volume Group
* Personal video recorder|PVR—Personal Video Recorder
* Preboot Execution Environment|PXE—Preboot Execution Environment
* PCI eXtensions for Instrumentation|PXI—PCI eXtensions for Instrumentation
{{div col end}}

Q


{{div col|colwidth=22em}}
* Quad Data Rate SRAM|QDR—Quad Data Rate
* Quality control|QA—Quality Assurance
* Quad Flat Package|QFP—Quad Flat Package
* Quality of service|QoS—Quality of Service
* QOTD—Quote of the Day
* Qt (toolkit)|Qt—Quasar Toolkit
* Queued teleprocessing access method|QTAM—Queued Teleprocessing Access Method
* Quarter Small Outline Package|QSOP—Quarter Small Outline Package
* Quality Windows Audio/Video Experience|qWave—Quality Windows Audio/Video Experience
{{div col end}}

R


{{div col|colwidth=22em}}
* RACF—Resource Access Control Facility
* Rapid application development|RAD—Rapid Application Development
* RADIUS—Remote Authentication Dial In User Service
* RAID—Redundant Array of Independent Disks
* Resource Acquisition Is Initialization|RAII—Resource Acquisition Is Initialization
* RAID|RAIT—Redundant Array of Inexpensive Tapes
* Random-access memory|RAM—Random Access Memory
* Reverse Address Resolution Protocol|RARP—Reverse Address Resolution Protocol
* Reliability, availability and serviceability (computer hardware)|RAS—Reliability, Availability and Serviceability
* remote access service|RAS—Remote access service
* DVD region code|RC—Region Code
* Release Candidate|RC—Release Candidate
* Run commands|RC—Run Commands
* Revision Control System|RCS—Revision Control System
* Remote desktop software|RD—Remote Desktop
* remove directory|rd—remove directory
* Relational database management system|RDBMS—Relational Database Management System
* Remote Desktop Connection|RDC—Remote Desktop Connection
* Resource Description Framework|RDF—Resource Description Framework
* Relational data model|RDM—Relational Data Model
* RTOS|RDOS—Real-time Disk Operating System
* Remote Desktop Protocol|RDP— Remote Desktop Protocol
* Remote Data Services|RDS—Remote Data Services
* Refal|REFAL—Recursive Functions Algorithmic Language
* Representational State Transfer|REST—Representational State Transfer
* Regular expression|regex—Regular Expression
* Regular expression|regexp—Regular Expression
* Radio frequency|RF—Radio Frequency
* Request for Comments|RFC—Request For Comments
* Radio frequency interference|RFI—Radio Frequency Interference
* Radio-frequency identification|RFID—Radio Frequency Identification
* RGB color model|RGB—Red, Green, Blue
* RGBA—Red, Green, Blue, Alpha
* Red Hat Linux|RHL—Red Hat Linux
* Red Hat Enterprise Linux|RHEL—Red Hat Enterprise Linux
* Rich Internet application|RIA—Rich Internet Application
* Recording Industry Association of America|RIAA—Recording Industry Association of America
* Raster image processor|RIP—Raster Image Processor
* Routing Information Protocol|RIP—Routing Information Protocol
* Regional Internet registry|RIR—Regional Internet registry
* Reduced instruction set computer|RISC—Reduced Instruction Set Computer
* RISC OS—Reduced Instruction Set Computer Operating System
* Remote job entry|RJE—Remote Job Entry
* Run-length encoding|RLE—Run-Length Encoding
* Run-length limited|RLL—Run-Length Limited
* remove directory|rmdir—remove directory
* Java remote method invocation|RMI—Remote Method Invocation
* Richard Stallman|RMS—Richard Matthew Stallman
* Read-only memory|ROM—Read Only Memory
* S-LINK|ROMB—Read-Out Motherboard
* ROM-DOS—Read Only Memory - Disk Operating System
* Remote procedure call|RPC—Remote Procedure Call
* IBM RPG|RPG—Report Program Generator
* RPM Package Manager|RPM—RPM Package Manager
* Routing and Remote Access Service|RRAS—Routing and Remote Access Service
* RSA (algorithm)|RSA—Rivest Shamir Adleman
* Repetitive strain injury|RSI—Repetitive Strain Injury
* Radio Service Software|RSS—Radio Service Software
* RSS—Rich Site Summary, RDF Site Summary, or Really Simple Syndication
* RTAI—Real-Time Application Interface
* Real-time clock|RTC—Real-Time Clock
* Real-time business intelligence|RTE—Real-Time Enterprise
* RTEMS—Real-Time Executive for Multiprocessor Systems
* Bi-directional text|RTL—Right-to-Left
* Real-time operating system|RTOS—Real-Time Operating System
* Real-time Transport Protocol|RTP—Real-time Transport Protocol
* Flow control (data)|RTS—Ready To Send
* Real Time Streaming Protocol|RTSP—Real Time Streaming Protocol
* Run-time type information|RTTI—Run-time Type Information
* Responsive Web Design|RWD—Responsive Web Design
{{div col end}}

S


{{div col|colwidth=22em}}
* Software as a service|SaaS—Software as a Service
* Security Account Manager|SAM— Security Account Manager
* Storage area network|SAN—Storage Area Network
* Serial attached SCSI|SAS—Serial attached SCSI
* Serial ATA|SATA—Serial ATA
* Simple API for XML|SAX—Simple API for XML
* Spinning beachball of death|SBOD—Spinning Beachball of Death
* Serial Bus Protocol 2|SBP-2—Serial Bus Protocol 2
* sbin—superuser binary
* Windows Small Business Server|sbs—Small Business Server
* Standard Build Unit|SBU—Standard Build Unit
* SCADA—Supervisory Control And Data Acquisition
* Source Code in Database|SCID—Source Code in Database
* Software configuration management|SCM—Software Configuration Management
* Revision control|SCM—Source Code Management
* Secure copy|SCP—Secure Copy
* Single channel per carrier|SCPC—Single Channel Per Carrier
* Standard Commands for Programmable Instruments|SCPI—Standard Commands for Programmable Instrumentation
* Secure Content Storage Association|SCSA—Secure Content Storage Association
* SCSI—Small Computer System Interface
* Stream Control Transmission Protocol|SCTP—Stream Control Transmission Protocol
* Secure Digital|SD—Secure Digital
* SDDL—Security Descriptor Definition Language
* Synchronous Digital Hierarchy|SDH—Synchronous Digital Hierarchy
* Single document interface|SDI—Single Document Interface
* Single Edge Contact|SEC—Single Edge Contact
* Secure Digital|SDIO—Secure Digital Input Output
* Software development kit|SDK—Software Development Kit
* Simple DirectMedia Layer|SDL—Simple DirectMedia Layer
* Service Delivery|SDN—Service Delivery Network
* Session Description Protocol|SDP—Session Description Protocol
* Software-defined radio|SDR—Software-Defined Radio
* Synchronous dynamic random access memory|SDRAM—Synchronous Dynamic Random Access Memory
* Symmetric digital subscriber line|SDSL—Symmetric DSL
* Single-ended signalling|SE—Single Ended
* Software Engineering Institute|SEI—Software Engineering Institute
* Search engine optimization|SEO—Search Engine Optimization
* FTP over SSH|SFTP—Secure FTP
* Simple File Transfer Protocol|SFTP—Simple File Transfer Protocol
* SSH file transfer protocol|SFTP—SSH File Transfer Protocol
* Silicon Graphics|SGI—Silicon Graphics, Incorporated
* Standard Generalized Markup Language|SGML—Standard Generalized Markup Language
* ANSI escape code#graphics|SGR—Select Graphic Rendition
* Secure Hash Algorithm|SHA—Secure Hash Algorithm
* Single-pair high-speed digital subscriber line|SHDSL—Single-pair High-speed Digital Subscriber Line
* SIGCAT—Special Interest Group on CD-ROM Applications and Technology
* SIGGRAPH—Special Interest Group on Graphics
* SIMD—Single Instruction, Multiple Data
* SIMM—Single Inline Memory Module
* Session Initiation Protocol|SIP—Session Initiation Protocol
* Supplementary Ideographic Plane|SIP—Supplementary Ideographic Plane
* SISD—Single Instruction, Single Data
* Single-Input and Single-Output|SISO—Single-Input and Single-Output
* SUSE Linux Enterprise Desktop|SLED—SUSE Linux Enterprise Desktop
* SUSE Linux Enterprise Server|SLES—SUSE Linux Enterprise Server
* Scalable Link Interface|SLI—Scalable Link Interface
* Serial Line Internet Protocol|SLIP—Serial Line Internet Protocol
* Service Level Management|SLM—Service Level Management
* Source lines of code|SLOC—Source Lines of Code
* Subject Matter Expert|SME—Subject Matter Expert
* Single-mode optical fiber|SMF—Single-Mode (optical) Fiber
* Software project management|SPM—Software project management
* SPMD—Single Program, Multiple Data
* SMA connector|SMA—SubMiniature version A
* Server Message Block|SMB—Server Message Block
* System Management BIOS|SMBIOS—System Management BIOS
* Synchronized Multimedia Integration Language|SMIL—Synchronized Multimedia Integration Language
* S/MIME—Secure/Multipurpose Internet Mail Extensions
* Supplementary Multilingual Plane|SMP—Supplementary Multilingual Plane
* Symmetric multiprocessing|SMP—Symmetric Multi-Processing
* Switched-mode power supply|SMPS—Switch Mode Power Supply
* SMS—Short Message Service
* System Management Server|SMS—System Management Server
* Simultaneous multithreading|SMT—Simultaneous Multithreading
* Simple Mail Transfer Protocol|SMTP—Simple Mail Transfer Protocol
* IBM Systems Network Architecture|SNA—Systems Network Architecture
* Simple Network Management Protocol|SNMP—Simple Network Management Protocol
* SNTP—Simple Network Time Protocol
* Service-oriented architecture|SOA—Service-Oriented Architecture
* SOAP—Simple Object Access Protocol
* Symbolic Optimal Assembly Program|SOAP—Symbolic Optimal Assembly Program
* Stop Online Piracy Act|SOPA—Stop Online Piracy Act
* System-on-a-chip|SoC—System-on-a-Chip
* SO-DIMM—Small Outline DIMM
* Standard Operating Environment|SOE—Standard Operating Environment
* Small office/home office|SOHO—Small Office/Home Office
* Silicon on insulator|SOI—Silicon On Insulator
* Service pack|SP—Service Pack
* Single-page application|SPA—Single Page Application
* Sender Policy Framework|SPF—Sender Policy Framework
* Serial Peripheral Interface Bus|SPI—Serial Peripheral Interface
* Stateful Packet Inspection|SPI—Stateful Packet Inspection
* SPARC—Scalable Processor Architecture
* SQL—Structured Query Language
* Static random access memory|SRAM—Static Random Access Memory
* Static single assignment form|SSA—Static Single Assignment
* V-Model (software development)|SSD—Software Specification Document
* Solid-state drive|SSD—Solid-State Drive
* Simple Service Discovery Protocol|SSDP—Simple Service Discovery Protocol
* Streaming SIMD Extensions|SSE—Streaming SIMD Extensions
* Secure Shell|SSH—Secure Shell
* Server Side Includes|SSI—Server Side Includes
* Single-system image|SSI—Single-System Image
* Small Scale Integration|SSI—Small-Scale Integration
* Service set (802.11 network)|SSID—Service Set Identifier
* Secure Sockets Layer|SSL—Secure Socket Layer
* Single Sign On|SSO—Single Sign On
* Supplementary Special-purpose Plane|SSP—Supplementary Special-purpose Plane
* Streaming SIMD Extensions|SSSE—Supplementary Streaming SIMD Extensions
* Shortest Path Problem #Single-source shortest paths|SSSP—Single Source Shortest Path
* Secure Socket Tunneling Protocol|SSTP—Secure Socket Tunneling Protocol
* su (Unix)|su—superuser
* Single UNIX Specification|SUS—Single UNIX Specification
* SUSE Linux|SUSE—Software und System-Entwicklung
* Scalable Video Coding|SVC—Scalable Video Coding
* Scalable Vector Graphics|SVG—Scalable Vector Graphics
* Super Video Graphics Array|SVGA—Super Video Graphics Array
* Structured VLSI design|SVD—Structured VLSI Design
* Adobe Flash|SWF—Shock Wave Flash
* Standard Widget Toolkit|SWT—Standard Widget Toolkit
* Sysop—System operator
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T


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* Optical disc recording modes|TAO—Track-At-Once
* Telephony Application Programming Interface|TAPI—Telephony Application Programming Interface
* Turbo Assembler|TASM—Turbo ASseMbler
* Terabyte|TB—TeraByte
* Tcl—Tool Command Language
* Transmission Control Protocol|TCP—Transmission Control Protocol
* Internet Protocol Suite|TCP/IP—Transmission Control Protocol/Internet Protocol
* Telecommunication Control Unit|TCU—Telecommunication Control Unit
* Time-division multiple access|TDMA—Time-Division Multiple Access
* Thin-film transistor|TFT—Thin-Film Transistor
* tif - image(Tagged Image File Format)
* TFTP—Trivial File Transfer Protocol
* Texas Instruments|TI—Texas Instruments
* Three-letter acronym|TLA—Three-Letter Acronym
* Top-level domain|TLD—Top-Level Domain
* Thread-local storage|TLS—Thread-Local Storage
* Transport Layer Security|TLS—Transport Layer Security
* Type-length-value|TLV—Type-length-value
* /var/run|tmp—temporary
* Terminal node controller|TNC—Terminal Node Controller
* TNC connector|TNC—Threaded Neill-Concelman connector
* Transaction Processing Facility|TPF—Transaction Processing Facility
* Trusted Platform Module|TPM—Trusted Platform Module
* TRON command|TROFF—Trace Off
* TRON command|TRON—Trace On
* TRON Project|TRON—The Real-time Operating system Nucleus
* TRSDOS—Tandy Radio Shack - Disk Operating System
* Time Sharing Option|TSO—Time Sharing Option
* Travelling salesman problem|TSP—Traveling Salesman Problem
* Terminate and Stay Resident|TSR—Terminate and Stay Resident
* TTA (codec)|TTA—True Tap Audio
* TrueType|TTF—TrueType Font
* Transistor–transistor logic|TTL—Transistor-Transistor Logic
* Time to live|TTL—Time To Live
* Speech synthesis|TTS—Text-to-Speech
* Computer terminal|TTY—Teletype
* Tucows|TUCOWS—The Ultimate Collection of Winsock Software
* TeX Users Group#Community|TUG—TeX Users Group
* TWAIN—Technology Without An Interesting Name
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U


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* UAAG—User Agent Accessibility Guidelines
* User Account Control|UAC—User Account Control
* Universal asynchronous receiver/transmitter|UART—Universal Asynchronous Receiver/Transmitter
* User Acceptance Testing|UAT—User Acceptance Testing
* Universal Character Set|UCS—Universal Character Set
* Universal Description Discovery and Integration|UDDI—Universal Description, Discovery, and Integration
* UDMA—Ultra DMA
* User Datagram Protocol|UDP—User Datagram Protocol
* UEFI—Unified Extensible Firmware Interface
* Ultra high frequency|UHF—Ultra High Frequency
* User interface|UI—User Interface
* Upload|UL—Upload
* Gate array|ULA—Uncommitted Logic Array
* Upper memory area|UMA—Upper Memory Area
* Upper memory area|UMB—Upper Memory Block
* Unified Modeling Language|UML—Unified Modeling Language
* User-mode Linux|UML—User-Mode Linux
* Ultra-Mobile PC|UMPC—Ultra-Mobile Personal Computer
* Universal Mobile Telecommunications System |UMTS—Universal Mobile Telecommunications System
* Universal Naming Convention|UNC—Universal Naming Convention
* UNIVAC—Universal Automatic Computer (By MKS)
* Uninterruptible power supply|UPS—Uninterruptible Power Supply
* Uniform Resource Identifier|URI—Uniform Resource Identifier
* Uniform Resource Locator|URL—Uniform Resource Locator
* Uniform Resource Name|URN—Uniform Resource Name
* Universal Serial Bus|USB—Universal Serial Bus
* :/usr|usr—user
* U.S. Robotics|USR—U.S. Robotics
* Coordinated Universal Time|UTC—Coordinated Universal Time
* Unicode|UTF—Unicode Transformation Format
* Unshielded twisted pair|UTP—Unshielded Twisted Pair
* UMTS Terrestrial Radio Access Network|UTRAN—Universal Terrestrial Radio Access Network
* UUCP—Unix to Unix Copy
* Universally Unique Identifier|UUID—Universally Unique Identifier
* Universal User Name|UUN—Universal User Name
* Universal Virtual Computer|UVC—Universal Virtual Computer
* Universal Windows Platform|UWP—Universal Windows Platform
* User experience design|UX—User Experience
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V


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* Filesystem Hierarchy Standard|var—variable
* VAX—Virtual Address eXtension
* DOS Protected Mode Interface|VCPI—Virtual Control Program Interface
* Virtual reality|VR—Virtual Reality
* VRML—Virtual Reality Modeling Language
* Visual Basic|VB—Visual Basic
* Visual Basic for Applications|VBA—Visual Basic for Applications
* VBScript|VBS—Visual Basic Script
* Desktop virtualization|VDI—Virtual Desktop Infrastructure
* Virtual DOS machine|VDM— Virtual DOS machine
* Very high bitrate digital subscriber line|VDSL—Very High Bitrate Digital Subscriber Line
* VESA—Video Electronics Standards Association
* File Allocation Table|VFAT—Virtual FAT
* Virtual Hard Disk|VHD — Virtual Hard Disk
* Virtual file system|VFS—Virtual File System
* Logical volume management|VG—Volume Group
* Video Graphics Array|VGA—Video Graphics Array
* Very high frequency|VHF—Very High Frequency
* Virtual LAN|VLAN—Virtual Local Area Network
* VLSM—Variable Length Subnet Mask
* VESA Local Bus|VLB—Vesa Local Bus
* Very low frequency|VLF—Very Low Frequency
* Very long instruction word|VLIW—Very Long Instruction Word
* Very-large-scale integration|VLSI—Very-Large-Scale Integration
* Virtual machine|VM—Virtual Machine
* Virtual memory|VM—Virtual Memory
* Hypervisor|VMM—Virtual Machine Monitor
* VNC—Virtual Network Computing
* Video on demand|VOD—Video On Demand
* Voice over Internet Protocol|VoIP—Voice over Internet Protocol
* Virtual private network|VPN—Virtual Private Network
* Graphics processing unit|VPU—Visual Processing Unit
* Virtual storage access method|VSAM—Virtual Storage Access Method
* Very small aperture terminal|VSAT—Very Small Aperture Terminal
* VT100|VT—Video Terminal?
* Virtual Tape Library|VTL— Virtual Tape Library
* Virtual telecommunications access method|VTAM—Virtual Telecommunications Access Method
* Video Random Access Memory|VRAM—Video Random Access Memory

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W


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* World Wide Web Consortium|W3C—World Wide Web Consortium
* Apple Worldwide Developers Conference|WWDC—Apple Inc.|Apple World Wide Developer Conference
* Wide area file services|WAFS—Wide Area File Services
* Web Accessibility Initiative|WAI—Web Accessibility Initiative
* Wide area information server|WAIS—Wide Area Information Server
* Wide area network|WAN—Wide Area Network
* Wireless access point|WAP—Wireless Access Point
* Wireless Application Protocol|WAP—Wireless Application Protocol
* Open Watcom Assembler|WASM—Watcom ASseMbler
* Web-Based Enterprise Management|WBEM—Web-Based Enterprise Management
* Web Content Accessibility Guidelines|WCAG—Web Content Accessibility Guidelines
* Windows Communication Foundation|WCF—Windows Communication Foundation
* Wavelength-division multiplexing|WDM—Wavelength-Division Multiplexing
* WebDAV—WWW Distributed Authoring and Versioning
* Wired Equivalent Privacy|WEP—Wired Equivalent Privacy
* Interrupt|WFI—Wait For Interrupt
* WiMAX—Worldwide Interoperability for Microwave Access
* WinFS—Windows Future Storage
* Windows RunTime|WinRT—Windows RunTime
* Windows Internet Name Service|WINS—Windows Internet Name Service
* Wireless LAN|WLAN—Wireless Local Area Network
* Windows Media Audio|WMA—Windows Media Audio
* Windows Management Instrumentation|WMI— Windows Management Instrumentation
* Windows Media Video|WMV—Windows Media Video
* Windows Push Notification Service|WNS—Windows Push Notification Service
* Wake-on-LAN|WOL—Wake-on-LAN
* Wake-on-ring|WOR—Wake-on-Ring
* Write once, run anywhere|WORA—Write once, run anywhere
* Write once, run anywhere|WORE—Write once, run everywhere
* Wi-Fi Protected Access|WPA—Wi-Fi Protected Access
* Web Proxy Autodiscovery Protocol|WPAD—Web Proxy Autodiscovery Protocol
* Personal area network|WPAN—Wireless Personal Area Network
* Windows Presentation Foundation|WPF—Windows Presentation Foundation
* WS-Discovery|WS-D—Web Services-Discovery
* Web Services Description Language|WSDL—Web Services Description Language
* Web Services Flow Language|WSFL—Web Services Flow Language
* Wireless USB|WUSB—Wireless Universal Serial Bus
* Wireless Wide Area Network|WWAN—Wireless Wide Area Network
* World Wide Name|WWID—World Wide Identifier
* World Wide Name|WWN—World Wide Name
* World Wide Web|WWW—World Wide Web
* WYSIWYG—What You See Is What You Get
* Wireless Zero Configuration|WZC—Wireless Zero Configuration
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X


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* XML Accessibility Guidelines|XAG—XML Accessibility Guidelines
* Extensible Application Markup Language|XAML—eXtensible Application Markup Language
* X Display Manager (implementation)|XDM—X Window Display Manager
* X display manager (program type)|XDMCP—X Display Manager Control Protocol
* XCBL—XML Common Business Library
* XHTML—eXtensible Hypertext Markup Language
* Xilp (Unix software)|XILP—X Interactive ListProc
* XML—eXtensible Markup Language
* XMMS—X Multimedia System
* Extensible Messaging and Presence Protocol|XMPP—eXtensible Messaging and Presence Protocol
* Extended memory|XMS—Extended Memory Specification
* Xerox Network Systems|XNS—Xerox Network Systems
* Cross-platform|XP—Cross-Platform
* Extreme Programming|XP—Extreme Programming
* XPCOM—Cross Platform Component Object Model
* XPInstall|XPI—XPInstall
* Interface description language|XPIDL—Cross-Platform IDL
* Open XML Paper Specification|XPS— XML Paper Specification
* XML Schema (W3C)|XSD—XML Schema Definition
* Extensible Stylesheet Language|XSL—eXtensible Stylesheet Language
* XSL Formatting Objects|XSL-FO—eXtensible Stylesheet Language Formatting Objects
* XSL Transformations|XSLT—eXtensible Stylesheet Language Transformations
* Cross-site scripting|XSS—Cross-Site Scripting
* eXtensible Tag Framework|XTF—eXtensible Tag Framework
* eXtended Triton Format|XTF—eXtended Triton Format
* XUL—XML User Interface Language
* XVGA—Extended Video Graphics Adapter
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Y


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* Year 2000 problem|Y2K—Year Two Thousand
* YAAF—Yet Another Application Framework
* Yacc|YACC—Yet Another Compiler Compiler
* YAML—YAML Ain't Markup Language
* YaST—Yet another Setup Tool
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Z


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* Zone bit recording|ZCAV—Zone Constant Angular Velocity
* Zero code suppression|ZCS—Zero Code Suppression
* Zero insertion force|ZIF—Zero Insertion Force
* Zero insertion force|ZIFS—Zero Insertion Force Socket
* Zip (file format)|ZIP—ZIP file archive
* Zero instruction set computer|ZISC—Zero Instruction Set Computer
* Zero One Infinity|ZOI—Zero One Infinity
* Zope|ZOPE—Z Object Publishing Environment
* Zone Multicast Address|ZMA—Zone Multicast Address
* ZPL (programming language)|ZPL—Z-level Programming Language
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See also


* Acronym
* List of file formats
* List of information technology initialisms

References


* http://www.all-acronyms.com

External links


{{Prone to spam|date=October 2013}}
* [http://www.roesler-ac.de/wolfram/acro/all.htm The UNIX Acronym List]