| Abbreviation | Definition |
|---|---|
| Wi-Fi | Wireless Fidelity Alliance |
| WIFP | Wakefield Interfaith Food Pantry |
| WIFS | Wayne International Friendship Society |
| WIFS | World/ Inferno Friendship Society |
| WII | Wildlife Institute of India |
| WII | World Impact, Inc. |
| WIJC | West Indies Junior Chamber Organization, Antigua |
| WIJC | Wisconsin Jaycees |
| WIJCO | West Indies Junior Chamber Organization, Antigua |
| WIJP | Wetlands International Japan |
| WILD | International Wilderness Leadership Foundation |
| WILD | Wilderness International Leadership Foundation |
| WILD | Wildlands Center for Preventing Roads |
| WIMR | Woolcock Institute of Medical Research |
| WIMSA | Women In Military Service for America |
| WIMSAM | Women In Military Service for America Memorial |
| WIMSAMF | Women In Military Service for America Memorial Foundation |
| WINDOW | Women In National Development Of Women |
| WINDREF | Windward Islands Research and Education Foundation |
| WINI | Women In Need Incorporated |