- WWTC(World Wide Talent Contest)
- WWTDP(Wyoming Western Trails Digitization Project)
- WWTG(What Was That Game?)
- WWTL(Worcestershire Workout Training & Leisure)
- WWTP(WasteWater Treatment Plant)
- WWTS(Waste Water Treatment Solution)
- WWTU(Wastewater Treatment Unit)
- WWTW(Waste Water Treatment Works)
- WWTZ(Western Wisconsin Technology Zone)
- WWU(WasteWater Utility)
- WWUA(Western Washington Umpires Association)
- WWUB(Walla Walla Union- Bulletin)
- WWUC(Washington Water Utility Council)
- WWU-E(Western Washington University - Everett)
- WWUG(WorldWide Users Group)
- 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)
