| 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 |