| Acronym | Definition |
|---|
| WSSO | Workstation Single Sign on |
| WSSO | Web Single Sign On |
| WSSO | West Shore Symphony Orchestra |
| WSSO | Women's Studies Student Organization (University of Alabama) |
| WSSO | Web Self Service Option |
| WSSO | Waste Storage and Shipping Operations |
| WSSO | Weapon System Support Officer |
| WSSO | Wing Special Services Officer (US AFROTC) |
| WSSO | Washington State Specific Objective |
| WSSO | Washington State Special Olympics |
| WSSO | Western Software Support Office (US Army) |
| WSSO | World Scout Security Organisation |
| WSSO | Women Studies Student Organization (University of Georgia) |