Од Википедија, слободна енциклопедија
- XAG — XML Accessibility Guidelines
- 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
- XP — Extreme Programming
- XPCOM — Cross Platform Component Object Model
- XPI — Cross Platform Installer
- XPIDL — Cross Platform IDL
- XSD — XML Schema Definition
- XSL — eXtensible Stylesheet Language
- XSL-FO — eXtensible Stylesheet Language Formatting Objects
- XSLT — XSL Transformations
- XSS — Cross Site Scripting
- XTF — Extensible Tag Framework
- XUL — XML-based User-interface Language