OMSC
| Acronym | Definition |
|---|---|
| OMSC | Overseas Ministries Study Center (est. 1922) |
| OMSC | Oh My StarClan |
| OMSC | Order Management Solutions Center |
| OMSC | Oshawa Motor Sport Club |
| OMSC | Object Management Standards Category |
| OMSC | Organic Milk Suppliers Cooperative (UK) |
| OMSC | Olton Mere Sailing Club (UK) |