| W | Watts |
| W | West |
| WA | Work Assignment |
| WA | Work Authority |
| WAD | Work Authorizing Document |
| WAM | WR Analysis Meeting |
| WAN | Wide Area Network |
| WAS | Web Application Server |
| WB | White Box |
| WBS | Work Breakdown Structure |
| WCA | Worst Case Analysis |
| WCDA | Wallops Command and Data Acquisition |
| WCDAS | Wallops Command and Data Acquisition Station |
| WCE | Worst-Case Estimate |
| WCRP | World Climate Research Program |
| WDR | Wet Dress Rehearsal (KSC) |
| WDRVI | Wide Dynamic Range Vegetation Index |
| WDT | Watch Dog timer |
| WDTB | Warning Decision Training Branch (NOAA) |
| WEFAX | Weather Facsimile |
| WES | Weather Event Simulator |
| WF-ABBA | Wildfire Automated Biomass Burning Algorithm |
| WFC | Wide Field Collimator |
| WFF | Wallops Flight Facility |
| WFMO | Workforce Management Office |
| WFO | Weather Forecast Offices |
| WG | Working Group |
| WGC | Working Group Collaboration |
| WGCV | Working Group on Cal/Val |
| WI | Watch Item |
| WI | Work Instruction |
| WIC | Workstation In Charge |
| WIFR | Within Frame Registration |
| WMO | World Meteorological Organization |
| WO | Work Order |
| WOA | Work Order Authorization (GSFC) |
| WOFT | Work Order Flow Tag |
| WOG | Work Order Generation |
| WPA | Warehouse Proxy Agent |
| WR | Waveguide Rectangular |
| WR | Western Range |
| WR | Work Request |
| WRAP | Wildfire Research and Applications Partnership (Rochester, NY) |
| WRED | Weighted Random Early Detection |
| WRF | Weather Research and Forecasting (model) |
| WRN | Weather Ready Nation |
| WRT | With Respect To |
| WS | Web Service (messaging) |
| WS | Winter Solstice |
| WS | Work Station |
| WSC | White Sands Complex |
| WSDL | Web Service Description Language |
| WV | Water Vapor |
| WVSS-II | Water Vapor Sensing System II |
| WWB | World Weather Building |
| WWLLN | World-Wide Lightning Location Network |
| WWRP | World Weather Research Program (WMO) |
| WXE | Wideband and Multiuse Data Link Extractor |