| Abbreviation | Definition |
|---|---|
| MRONLY | Maintenance Repair and Operations Only |
| MRPC | Molded Rubber Plastic Corp |
| MRPI | Military Resource Professionals, Inc. |
| MRPL | Mangalore Refinery and Petrochemical Ltd |
| MRPL | Mangalore Refinery and Petrochemicals Ltd |
| MRPL | Mangalore Refinery Petrochemicals Ltd |
| MRR | Montana River Realty |
| MRRG | Mississippi River Radio Group |
| MRS | Medical Repair Service |
| MRS | Michigan Rehabilitation Services |
| MRS | Molitor Racing Systems |
| MRSB | Michigan Rehabilitation Specialists of Brighton |
| MRSI | Medical Recovery Specialists Inc |
| MRSI | Mercer Residential Services Inc |
| MRSI | Micro Robotics Systems Inc |
| MRSI | Mineral Recovery Specialists Inc |
| MRSI | Mountain Regional Service Inc |
| MRSI | Mountain Regional Services Inc |
| MRSL | Market Research Services, Ltd. |
| MRSL | Market Research Solutions Limited |