| Acronym | Definition |
|---|
| OSSW➣Organization of Student Social Workers (various schools) |
| OSSW➣Office of the Secretary of State for Wales (UK) |
| OSSW➣Operations Support Systems Wing (US Air Force) |
| OSSW➣Ohio Statewide Science Workshop |
| OSSW➣On the Same Stone With (transcribing headstones for genealogical work) |
| OSSW➣Outstate Seller of Wine (Michigan) |