| Acronym | Definition |
|---|
| OCOS➣Old Coots on Scoots (motorbikes) |
| OCOS➣Ordway Circle of Stars (Ordway Center for the Performing Arts; Saint Paul, MN) |
| OCOS➣Orange County Orchid Society (California) |
| OCOS➣Office Chief Of Signal |
| OCOS➣Old Crusty Old Soldiers |
| OCOS➣Organizational Change Orientation Scale |
| OCOS➣Overseas Conditions of Service (Australia) |