| Abbreviation | Definition |
|---|---|
| W3C | World Wide Web Consortium |
| WAE | When Actually Employed |
| WAG | Widely Attended Gathering |
| WAT(CFSAN) | Worklife Analysis Team (CFSAN) |
| WB | Western Blot |
| WCHI | Workers Compensation Health Initiative |
| WEAC | Winchester Engineering and Analytical Center |
| WebSDM | Web-based Submission Data Manager |
| WEDA | Workforce Equity and Diversity Action |
| WEDI | Workgroup for Electronic Data Interchange |
| WFH | World Federation of Hemophilia |
| WFI | Water For Injection |
| WHO | World Health Organisation |
| WHO-ART | World Health Organisation Adverse Reaction Terminology |
| WIB | Western ImmunoBlot |
| WIC | Women, Infants, and Children nutrition program |
| WIGI | WithIn-Grade Increase |
| WIN | Welfare Information Network |
| WISQARS | Web-based Injury Statistics Query And Reporting System |
| WIT | Workflow Improvement Team |