- WWUI (Western Wildland Urban Interface)
- WWUK (Water Works United Kingdom)
- WWUM (Westfälische Wilhelms- Universität Münster)
- WWUN (WorldWide Universities Network)
- WWUP (Working With the Underserved Preceptorship)
- WWUU (World Wide Used Utility)
- WWV (Wagner-Werk-Verzeichnis (catalog of the works of Richard Wagner, and callsign of NIST's shortwave radio station in Fort Collins, Colorado))
- WWVA (Walla Walla Valley Academy)
- WWVB (Standard Time And Frequency Station, 60KHz, Fort Collins, Colorado)
- WWVC (Worldwide Vacation Club)
- WWVF (World Wide Video Festival)
- WWVH (Standard Time And Frequency Station, 2.5 Mhz, 5 Mhz, 10 Mhz, 15 Mhz, Kekaha, Kauai, Hawaii)
- WWVR (World Wide Veterans Radio)
- WWVT (Waste Water Vacuum Tank)
- WWVT/T (WASTE WATER VACUUM Tank Trailer)
- WWVTT (WASTE WATER VACUUM Tank Trailer)
- WWVW (WorldWide Volunteer Week)
- WWW (World Wide Web)
- WWWA (Wyoming Water Well Association)
- WWWB (World- Wide White Brotherhood)
- WWWD (World Wide War Drive)
- WWWE (World Wide Wrestling Entertainment)
- WWWF (World Wide Wrestling Federation)