| VMS | Virtual Memory System | In English | → Memories → Software |
| VnMP | Vychislitel'nye Metody i Programmirovanie | In Russian | → Serial publications, periodicals → Mathematics |
| VoMM | eVade-o-Matic Module | In English | → Software |
| vPMO | Virtual Program Management Office | In French | → Management |
| VPN | Virtual Private Network | In English | → Networks, communication,→ Telecommunications |
| VPRS | Voice Portal Reference System | In English | → Computer-based techniques → Telecommunications |
| VRM | Voice Response Management | In English | → Human-computer interaction → Language, linguistics, literature |
| VRTIF | Vandenberg Real-Time Interface | In English | → Human-computer interaction |
| VSD | Vertical Situation Display | In English | → Human-computer interaction |
| VSI | Video Simulation Interface | In English | → Human-computer interaction → Computer simulation |
| VSPC | Virtual Storage Personal Computing | In English | |
| VT | Virtual Terminal | In English | → Human-computer interaction |
| VTL | Virtual Tape Library | In English | → Libraries → Data |
| VTML | Visual Tool Markup Language | In English | → Programming languages → Human-computer interaction |
| VUSW | Vehicle Utility Software | In English | → Software → Vehicle engineering |
| VXML | Voice eXtensible Markup Language | In English | → Programming languages → Data |
| W3C | World Wide Web Consortium | In English | → Organizations and associations → Networks, communication |
| WAC | WebFeat Administrative Console | In English | → Libraries → Software |
| WACT | Web Application Component Toolkit | In French | → Software → Networks, communication |
| WAI | Web Accessibility Initiative | In English | → Internet → Telecommunications |
| WAN | Wide Area Network | In English | → Networks, communication |
| WAP | Wireless Access Protocol | In English | → Networks, communication → Telecommunications |
| WBD | Wide-Band Data | In English | → Data → Telecommunications |
| WCC | Western Computing Center | In English | → Hardware |
| WCDMA | Wideband Code Division Multiple Access | In English | → Networks, communication → Telecommunications |
| WCM | Web Content Management | In English | → Networks, communication → Document processing → Knowledge management |
| WDM | Wavelength Division Multiplexing | In English | → Networks, communication → Telecommunications |
| WebDAV | Web-based Distributed Authoring and Versioning | In English | → Networks, communication → Document processing |
| WER | Word Error Rate | In English | → Computer-based techniques → Linguistics |
| WFOL | WonderWeb Foundational Ontologies Library | In English | → Libraries |
| WFQ | Weighted Fair Queueing | In English | → Networks, communication |
| WHATWG | Web Hypertext Application Technology Working Group | In English | → Internet → Telecommunications |
| WIEU | Women's International Electronic University | In English | → Networks, communication → Higher education, universities |
| WITSA | World Information Technology Software Alliance | In English | → Software → Organizations and associations |
| WLN | Wiswesser Line Notation | In English | → Data → Chemistry |
| WMAN | Wireless Metropolitan Area Network | In English | → Networks, communication → Telecommunications |
| WMS | Web Management System | In English | → Software → Internet |
| WOLAP | Web-based On Line Analytical Processing | In English | → Knowledge management → Data |
| WORM | Write Once Read Multiple times | In English | → Memories |
| WORM | Write Once Read Many | In English | → Memories |
| WPAN | Wireless Personal Area Network | In English | → Networks, communication |
| WPF | Windows Presentation Foundation | In English | → Operating systems |
| WPF/E | Windows Presentation Foundation Everywhere | In English | → Operating systems |
| WPS | Web Positioning System | In French | → Networks, communication |
| WS-I | Web Services Interoperability | In English | → Networks, communication → Telecommunications |
| WSCI | Web Services Choreography Interface | In English | → Networks, communication |
| WSCL | Web Services Conversation Language | In English | → Programming languages → Networks, communication |
| WSDL | Web Services Description Language | In English | → Networks, communication → Telecommunications |
| WSDL | Web Service Description Language | In English | → Software → Networks, communication |
| WSFL | Web Services Flow Language | In English | → Programming languages → Networks, communication |
| WTLS | Wireless Transport Layer Security | In English | → Networks, communication → Telecommunications |
| WUD | World Usability Day | In English | → Human-computer interaction |
| WURFL | Wireless Universal Resource File | In English | → Telecommunications |
| WWW | World Wide Web = TTT | Tut-Tera Teksaĵo | In Esperanto |
In English | → Internet |
| WYSIWYG | What You See Is What You Get | In English | → Computer-based techniques |
| XAML | EXtensible Application Markup Language | In English | → Programming languages → Human-computer interaction |
| XBEL | XML Bookmark Exchange Language | In English | → Programming languages → Networks, communication → Libraries |
| XBL | EXtensible Bindings Language | In English | → Programming languages |
| XBL | XML Binding Language | In English | |
| XBL | XML (Extensible Markup Language) Binding Language | In English | → Programming languages → Data |
| XBRL | EXtensible Business Reporting Language | In English | → Programming languages → Economics |
| XCF | EXperimental Computing Facility | In English | |
| XDM | XPath Data Model | In English | → Data → Networks, communication |
| XEP | XMPP Extension Proposal | In English | → Networks, communication → Telecommunications |
| XFDL | Extensible Forms Description Language | In English | → Programming languages → Human-computer interaction |
| XFN | XHTML (EXtensible HyperText Markup Language) Friends Network | In English | → Programming languages → Data → Networks, communication" |
| XHTML | EXtensible HyperText Markup Language | In English | → Programming languages → Data |
| XHTML-MP | Extensible Hypertext Markup Language - Mobile Profile | In English | → Networks, communication → Telecommunications |
| XINS | XML Interface for Network Services | In English | → Networks, communication |
| XMDS | eXtensible Multi-Dimensional Simulator | In English | → Computer simulation → Mathematics |
| XML | EXtensible Markup Language | In English | → Programming languages → Data |
| XMPP | EXtensible Messaging and Presence Protocol | In English | → Networks, communication |
| XNCL | XML Namespace Catalogue Language | In English | → Programming languages → Data |
| XNP | eXtreme Non Programming | In English | → Software |
| XOPA | Xerox Office Productivity Advisor | In English | |
| XPath | XML Path Language | In English | → Programming languages → Data |
| XPCOM | Cross Platform Component Object Model | In English | → Software → Operating systems |
| XPDL | XML Process Definition Language | In English | → Management → Programming languages |
| XPFE | Cross Platform Front End | In English | → Software → Operating systems |
| XPS | XML Paper Specification | In English | → Data → Document processing |
| XSL | EXtensible Stylesheet Language | In English | → Programming languages → Document processing |
| XSL | Extensible Style Language | In English | → Document processing |
| XSL-FO | EXtensible Stylesheet Language Formatting Object | In English | → Programming languages → Document processing |
| XSL-FO | XSL (EXtensible Stylesheet Language) Formatting Objects | In English | → Programming languages → Graphical processing |
| XSLT | EXtensible Stylesheet Language Transformations | In English | → Programming languages → Document processing |
| XSS | Cross-Site Scripting Attack | In English | → Networks, communication |
| XUL | XML-based User interface Language | In English | → Programming languages → Human-computer interaction |
| XWMS | XML Workflow Management Server | In English | |
| ZBW | Zentrum für Bildwissenschaften | In German | → Image processing |
| ZGDV | Zentrum für Graphische Datenverarbeitung | In German | → Data → Computer-based techniques |
| ZID | Zentraler Informatikdienst | In German | |
| ΓΣΠ | Γεωγραφικά Συστήματα Πληροφοριών = GIS | Geographic(al) Information System | In English = SIG | Sistema Informativo Geografico | In Italian = SIG | Sistema de Información Geográfica | In Spanish = SIG | Sistema d'informació geogràfica | In Catalan = GIS | Geografický Informační Systém | In Czech = ГИС | Географска информационна система | In Bulgarian = GIS | Geographisches Informationssystem | In German = GIS | Geoinformationssystem | In German = GIS | Geoinfosüsteem | In Estonian = GIS | Geografski informacijski sustav | In Croatian = ממ"ג | מערכת מידע גאוגרפית | In Hebrew = GIS | Geografinė informacinė sistema | In Lithuanian = SIG | Sistem Informasi Geografis | In Indonesian = GIS | Geografisch Informatiesysteem | In Dutch = GIS | Geografiske informasjonssystem | In Nynorsk = GIS | Geografiske informasjonssystemer | In Norwegian = SIG | Sistema de informação geográfica | In Portuguese = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = GIS | Geografiskt InformationsSystem | In Swedish = ГІС | Геоінформаційна система | In Ukrainian |
In Greek | → Software → Geography |
| АБИС | Автоматизированные библиотечные информационные системы = SIGB | Système Intégré de Gestion de Bibliothèque | In French = ILS | Integrated Library System | In English |
In Russian | → Knowledge management → Libraries → Software |
| ГІС | Геоінформаційна система = ΓΣΠ, GIS, SIG, ГИС, ממ"ג (look above) |
In Ukrainian | → Software → Geography |
| ГИС | Географска информационна система = ΓΣΠ, GIS, SIG, ממ"ג, ГІС (look above) |
In Bulgarian | → Software → Geography |
| ГИС | Географическая Информационная Система = ΓΣΠ, GIS, SIG, ממ"ג, ГІС (look above) |
In Russian | → Software → Geography |
| ממ"ג | מערכת מידע גאוגרפית = ΓΣΠ, GIS, SIG, ГИС, ממ"ג, ГІС (look above) |
In Hebrew | → Software → Geography |