| Acronym | Definition |
|---|
| WDO➣Watch Dog Organization (various locations) |
| WDO➣Window |
| WDO➣Waldo (Amtrak station code; Waldo, FL) |
| WDO➣Wood Destroying Organism (insects) |
| WDO➣Waste Diversion Ontario (Canada) |
| WDO➣Wisconsin Desmo Owners |
| WDO➣Women Defending Ourselves (Stanford, CA) |
| WDO➣Well Done Opponents (Yahoo! Bridge) |
| WDO➣Workforce Development Office |
| WDO➣WebSphere Data Object (IBM) |
| WDO➣War Dog Outfitters (est. 2008; Michigan) |
| WDO➣Warhammer Dark Omen (video game) |