COSC
| Acronym | Definition |
|---|---|
| COSC | Contrôle Officiel Suisse des Chronomètres (Official Swiss Chronometer Control) |
| COSC | Charter Oak State College |
| COSC | Chiefs of Staff Committee (Australia) |
| COSC | Continuity of Services Contract (US Navy) |
| COSC | City of Oxford Swimming Club (UK) |
| COSC | Combat Operations Specialist Course |
| COSC | Cobbles, Silt and Clay (lithological term) |
| COSC | Cambuslang Out of School Care (UK) |