| Acronym | Meaning |
 | W/W | Wheel Well |
| W/WMS | Water/Waste Management System (Subsystem) |
| W/Y | Wrist Yaw |
| WA | Wide Angle |
| WA | Work Authorization |
| WAD | Work Authorization Document/Shop Order |
| WAD/NU | Work Authorization Number |
| WAR | Work Authorization Report |
| WARN | Warning |
| WAT | Web Action Time |
| WB | Waterboiler |
| WBC | White Blood Cells |
| WBDI | Wideband Data Interleaver |
| WBR | Work Bench Rack |
| WBS | Work Breakdown Structure |
| WBSC | Wide-band Signal Conditioner |
| WBSC | Wide-Band Signal Conditioner |
| WBT | Wide-Band Terminal |
| WCCU | Wireless Crew Communication Unit |
| WCLS | Water Coolant Loop System |
| WCS | Waste Collection System |
| WMC | Waste Management Compartment |
| WONG | Weight On Nose Gear |
| WOW | Weight On Wheels |
| WP | Way Point |
| WSB | Water Spray Boiler |
| WSGT | White Sands Ground Terminal |
| WSTF | White Sands Test Facility |
| WTR | Western Test Range |
| WTR | Western Test Range |
| WTR | SYS Water System |
| WTSC | Wet Tantalum Slug Capacitor |
| WTT | Wind Tunnel Test |
| WUC | Work Unit Code |
| WUCF | Work Unit Code File |
| WUSCI | Western Union Space Communications |
| WW | Water Waste |
| WW | Wire Wrap |
| WWMS | Waste Water Management System |
| WX | Weather |
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