| Abbreviation | Definition |
|---|---|
| WNS | WADP (World Association for the Development of Philately) Numbering System |
| WNS | World Numbering System (stamps) |
| WNW | Wingnut Wings |
| WOAC | Winamac Old Auto Club |
| WOMEN | Women Owners, Managers, and Executives Networking |
| WOT | Wide Open Throttle |
| WOW | Women Of the Web |
| WPCC | Western Province Cat Club |
| WPN | Women's Prosperity Network |
| WPRS | Wichita Paranormal Research Society |
| WPSV | Wildlife Photographers of Silicon Valley |
| WRAM | Westchester Radio Aeromodelers |
| WRBA | Western Regional Button Association |
| WRBS | Western Regional Button Show |
| WRCA | Western Ranch Cowboy Association |
| WRCS | Warringah Radio Control Society |
| WRIC | Western Reserve Insulator Club |
| WRJC | Weardale Railway Junior Club |
| WROA | Western Region Ostrich Association |
| WRS | Wirral Rocketry Society |