| Acronym | Definition |
|---|
| IMSA➣Illinois Mathematics and Science Academy |
| IMSA➣Insurance Marketplace Standards Association |
| IMSA➣International Motor Sports Association |
| IMSA➣Interscan Messaging Security Appliance |
| IMSA➣International Municipal Signal Association |
| IMSA➣InterScan Messaging Security Appliance (Trend Micro) |
| IMSA➣Iterative Multi-Scaling Approach (microwave theory) |
| IMSA➣Incident Medical Specialist Assistant |
| IMSA➣Isuzu Manufacturing Services of America (Plymouth, MI) |
| IMSA➣Illinois Mini Storage Association |
| IMSA➣Institute of Marine Safety Auditors |
| IMSA➣Installation Medical Supply Account |
| IMSA➣Integrated Medical Sciences Assessment (UK) |
| IMSA➣Installation Medical Support Activity |
| IMSA➣Seaman Apprentice, Instrumentman Striker (Naval Rating) |