WASO
| Acronym | Definition |
|---|---|
| WASO | West Australian Symphony Orchestra |
| WASO | Weighted Average Shares Outstanding (finance) |
| WASO | Wake-time After Sleep Onset |
| WASO | Washington Support Office (US National Park Service) |
| WASO | World All Styles Organisation (est. 1984; Mulgrave, Victoria, Australia; martial arts) |
| WASO | Water Allocation Security Objectives (Australia) |
| WASO | WWMCCS ADP Security Officer |