COSR
| Acronym | Definition |
|---|---|
| COSR | Card of Safe Return (Yu-Gi-Oh! card) |
| COSR | Cost of Service Ratio (statistic) |
| COSR | Combat and Operational Stress Reactions (US DoD) |
| COSR | Contracted-out Salary Related |
| COSR | Circular Overpile Stacker Reclaimer (construction) |
| COSR | Conventional Ordnance Safety Review |
| COSR | Continued Operations Safety Report (UK nuclear industry) |
| COSR | Center for Optical Signature Recognition |
| COSR | Continuity of Operations - Secure Recovery |
| COSR | Continued Operational Safety Case |
| COSR | Commanding Officer's Stateroom |