| Abbreviation | Definition |
|---|---|
| IMOSAR | International Maritime Organization (IMO) Search and Rescue Manual |
| IMOSS | Interim Mobile Oceanographic Support System |
| IMP | Impedance |
| IMP | Implementation |
| IMP | Implementation and Monitoring Plan |
| IMP | Individual Meal Pack |
| IMP | Information Management Plan |
| IMP | Input Message Processing |
| IMP | Intelligence Message Processor |
| IMP | Interface Management Plan |
| IMP | Interface Message Processor |
| IMP | Inventory Management Plan |
| IMPAC | Immediate Military Purchase Action Card |
| IMPACT | Indiana Militia Practicing Airsoft Combat Tactics |
| IMPACT | Insensitive Munitions Packaging Technology |
| IMPACT | Intelligence Management Performance Accountability Communication And Tactical |
| IMP-ATACMS | IMProved Army TACtical Missile System |
| IMPT | Incident Management Planning Team |
| IMR | Improved Military Rifle |
| IMRL | Individual Material Requirements List |