Walk-through
War dialer
Warm site
Waterfall development
Web hosting
Web page
Web server
Web Services Description Language [WSDL]
Web site

Well-know ports
White box testing
Wide area network [WAN]
Wide area network (WAN) switch
Wi-Fi Protected Access [WPA]
Wi-Fi protected access II [WPA2]

Windows NT
Wired Equivalent Privacy [WEP]
Wireless computing
Wireless local area network [WLAN]
Wiretapping
World Wide Web [WWW]
World Wide Web Consortium [W3C]
Worm
Write blocker
Write protect