| Abbreviation | Definition |
|---|---|
| WEFAX | WEather FAcsimile |
| WEO | Wide Earth Orbit |
| WES | Water Electrolysis System |
| WETA | WVS (Wireless Video System) External Transceiver Assembly |
| WETF | Weightless Environment Training Facility |
| WETS | Weightless Environment Training System |
| WF | Wide Field |
| WF/PC | Wide Field/Planetary Camera |
| WFDO | Work Force Development Opportunities |
| WFI | Wide Field Imager |
| WFIS | Wide-Field-of-view Imaging Spectrometer |
| WFNA | White Fuming Nitric Acid |
| WFPC | Wide Field Planetary Camera |
| WFPC2 | Wide Field and Planetary Camera 2 |
| WG | Wave Guide |
| WG | WinG |
| W-G | Water-Glycol |
| WGOD | War Garming Operations Division |
| WGQA | Working Group on Quality Assurance Matters |
| WGQC | Working Group on Quality Control |