| Acronym | Definition |
|---|
| IMRR➣Illinois and Midland Railroad |
| IMRR➣Insurance Medical Records Review (Genesis Claims Resolution, Inc.; Keller, TX) |
| IMRR➣Interracial Multicultural Romance Readers (novel reading organization) |
| IMRR➣Inspection Maintenance and Repair Record |
| IMRR➣Institute of Magnetic Resonance Research (Australia) |