| 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) |