| Acronym | Definition |
|---|
| OCASA➣Oakland Community After School Alliance (Oakland, CA) |
| OCASA➣Ontario College Administrative Staff Association (Canada) |
| OCASA➣Off Campus and Apartment Student Association (Rochester Institute of Technology; Rochester, NY) |
| OCASA➣Oneida County Area Snowmobile Association (New York) |
| OCASA➣Organización Clearing Argentino SA (Spanish: Argentine Clearing Organization SA) |