| Acronym | Definition |
|---|
| RMSA➣Rastriya Madhyamik Shiksha Abhiyan (Indian initiative) |
| RMSA➣Relevant Metropolitan Statistical Area |
| RMSA➣Rocky Mountain Spearfishing Association |
| RMSA➣Rocky Mountain Society of Aviculture |
| RMSA➣Retiree Medical Savings Account |
| RMSA➣RMSU (Russian State Medical University) Malaysian Students Association |
| RMSA➣Retail Merchandising Service Automation |
| RMSA➣Rocky Mountain Scottish Athletes |
| RMSA➣Rocky Mountain Soaring Association |
| RMSA➣Rural Music Schools Association (now Benslow Music Trust; UK) |
| RMSA➣Registered Member of the Society of Archivists (UK) |
| RMSA➣Rectangular Microstrip Antenna |
| RMSA➣Research Management Self Assessment |
| RMSA➣Seaman Apprentice, Radioman Striker (Naval Rating) |
| RMSA➣Roof Manufacturers & Suppliers Association (Ireland) |
| RMSA➣Radiological Material Storage Area |