| Acronym | Definition |
|---|
| OSCA | Officine Specializate Construzione Automobili |
| OSCA | Optical Switching Components and Applications |
| OSCA | Office of State Courts Administrator |
| OSCA | On Shelf Customer Availability (Walmart) |
| OSCA | Ontario Street Car Association |
| OSCA | Officine Specializate Costruzione Automobili (race car manufacturer) |
| OSCA | Objective Structured Clinical Assessment |
| OSCA | Office of Senior Citizen Affairs (Philippines) |
| OSCA | Operations Systems Computing Architecture (Bellcore) |
| OSCA | Open Systems Color Association |
| OSCA | Order of the Seven Churches of Asia |