- W4 WorldWide Web Wanderer
- WAIS Wide-Area Information Servers
- WAN Wide Area Network
- WATS Wide Area Telephone Service / Wide Area Telecommunications Service
- wcCODE wildcat Custom On-line Development Engine
- WELL Whole Earth 'Lectronic Link
- WG WorkGroup
- WHAT Windows Help Authoring Tools
- WIMP Windows, Icons, Mouse, Pointer
- WINS Windows Internet Naming Service
- WISDN Wireless Intelligent Services Distributed Netwide
- WMF Windows Meta Files
- WORM Write Once Read Many
- WRK Windows Resource Kit
- WRT With Respect To / With Regard To
- WWIS WorldWide Information Systems
- WWW World Wide Web
- WYSIWYG What You See Is What You Get
- WYSIWYP What You See Is What You Print