FOSC
| Acronym | Definition |
|---|---|
| FOSC | Fairfield Optimist Soccer Club (Fairfield, OH) |
| FOSC | Frequency of Oscillator |
| FOSC | Fort Scott National Historic Site (US National Park Service) |
| FOSC | Fiber Optic Splice Closure |
| FOSC | Feuille Officielle Suisse du Commerce (Swiss government's Official Gazette of Commerce) |
| FOSC | Federal On-Scene Commander |
| FOSC | Federal On-Scene Coordinators |
| FOSC | Friends of Studham Common (UK) |
| FOSC | Free/Open Source Community |
| FOSC | Flag Officer Steering Committee |