OSSW
| 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) |