| WIFI | Wireless Fidelity |
| WPA | Wi-Fi Protected Access |
| WBC | White Blood Cell |
| WWF | World Wide Fund for Nature |
| WWF | World Wrestling Federation |
| WIPRO | Western India Products |
| WEF | World Economic Forum |
| WEF | With Effect From |
| WCW | Woman Crush Wednesday / World Championship Wrestling |
| WWW | World Wide Web |
| WFM | Works for Me |
| WRT | With Regard to |
| WTH | What the Hell / What the Heck |
| WTF | What the Fuck |
| WFH | Work From Home |
| W/O | Without |
| WAKT Time Zone | Wake Time (Standard Time) |
| WARST Time Zone | Western Argentine Summer Time (Daylight Saving Time) |
| WAST Time Zone | West Africa Summer Time (Daylight Saving Time) |
| WAT Time Zone | West Africa Time (Standard Time) |
| WEST Time Zone | Western European Summer Time (Daylight Saving Time) |
| WET Time Zone | Western European Time (Standard Time) |
| WFT Time Zone | Wallis and Futuna Time (Standard Time) |
| WGT Time Zone | West Greenland Time (Standard Time) |
| WIB Time Zone | Western Indonesian Time (Standard Time) |
| WIT Time Zone | Eastern Indonesian Time (Standard Time) |
| WST Time Zone | West Samoa Time (Standard Time) |
| WT Time Zone | Western Sahara Standard Time (Standard Time) |
