| WMAN | Wireless Metropolitan Area Network | En la angla | → Telekomunikado |
| WMS | Web Management System | En la angla | → Programaro → Interreto |
| WPAN | Wireless Personal Area Network | En la angla | |
| WPAN | Wireless Personal-Area Network | En la angla | → Telekomunikado |
| WPS | Web Positioning System | En la franca | |
| WS-I | Web Services Interoperability | En la angla | → Telekomunikado |
| WSCI | Web Services Choreography Interface | En la angla | |
| WSCL | Web Services Conversation Language | En la angla | → Programlingvoj |
| WSDL | Web Service Description Language | En la angla | → Programaro |
| WSDL | Web Services Description Language | En la angla | → Telekomunikado |
| WSFL | Web Services Flow Language | En la angla | → Programlingvoj |
| WSOA | Web Services Oriented Architecture | En la angla | → Programaro |
| WTLS | Wireless Transport Layer Security | En la angla | → Telekomunikado |
| WWW | World Wide Web = TTT | Tut-Tera Teksaĵo | En Esperanto |
En la angla | → Interreto |
| XBEL | XML Bookmark Exchange Language | En la angla | → Programlingvoj → Libraroj |
| XDM | XPath Data Model | En la angla | → Datenoj |
| XEP | XMPP Extension Proposal | En la angla | → Telekomunikado |
| XFN | XHTML (EXtensible HyperText Markup Language) Friends Network | En la angla | → Programlingvoj → Datenoj" |
| XHTML-MP | Extensible Hypertext Markup Language - Mobile Profile | En la angla | → Telekomunikado |
| XINS | XML Interface for Network Services | En la angla | |
| XMPP | EXtensible Messaging and Presence Protocol | En la angla | |
| XSS | Cross-Site Scripting Attack | En la angla |