| Acronym | Definition |
|---|
| OCCSA➣Ohio Correctional and Court Services Association (est. 1928; Columbus, OH) |
| OCCSA➣Oregon Community College Student Association (est. 1962) |
| OCCSA➣Orange County Chiefs and Sheriffs Association (California) |
| OCCSA➣Ovarian Cancer Cell Surface Antigen (gynecological oncology) |
| OCCSA➣Ohio Collegiate Computing Services Association (Miami University; Oxford, OH) |