| Acronym | Definition |
|---|
| CCOS | Culture Collection of Switzerland (biorepository services) |
| CCOS | Central California Ozone Study (California Air Resources Board) |
| CCOS | Centro Culturale Odontostomatologico (Italian cultural center) |
| CCOS | Computer-Controlled Optical Surfacing |
| CCOS | Children's Clinical On-Site Services (various locations) |
| CCOS | Close Combat Optic Sight |
| CCOS | Churches Commission on Overseas Students (UK) |
| CCOS | Coup de Consolidation |
| CCOS | Central California Orchid Society (Fresno, CA) |
| CCOS | Centre de Chirurgie Orthopédique et Sportive (French: Orthopedic Surgery and Sports Center) |