| Materials Research Laboratory | Academic & Science |
| Mathematical Research Letters | Academic & Science |
| Merck Research Laboratories | Academic & Science |
| My Resource Library | Academic & Science |
| MacDonald Research Laboratories | Academic & Science |
| Manuals of Romance Linguistics | Academic & Science |
| Millennium Research Laboratories | Academic & Science |
| Mycobacteria Research Laboratories | Academic & Science |
| Musculoskeletal Research Laboratories | Academic & Science |
| Media Research Lab | Academic & Science |
| Marine Resources Library | Academic & Science |
| Morrisson Reeves Library | Academic & Science |
| Miners Lake | Airport Code |
| Marine Drilling Company, Inc. | Business |
| Minimal Risk Level | Business |
| Materials Resources LLC | Business |
| Machineroom Less Elevator | Business |
| Mantra Resources Limited | Business |
| Marketing Resources Ltd | Business |
| Maximum Residue Level | Chemistry |
| Media Resource Library | Community |
| Master of Religious Leadership | Community |
| Manual Retention Latch | Computer Hardware |
| Media Resource Locator | Computer Technology |
| Memory Read Line | Computing |
| Microprocessor Research Lab | Computing |
| Mixed Reality Laboratory | Computing |
| Main Ring Length | Computing |
| Microsoft Research Labs | Computing |
| Merchandise Recyclers Lqdtrs | General |
| Modified Reporting Limit | General |
| Market Readiness Level | General |
| Manufacturing Readiness Levels | General |
| Milwaukee Road Lives | General |
| Manufacturing Readiness Level | General |
| Modification And Reuse In Logic | General |
| Madras Refineries Limited | General |
| Maximum Residue Limits | General |
| Method Reporting Limit | General |
| Mark Rite Lines | General |
| Multiple Rocket Laucher | General |
| Machine Room Less | General |
| Middle Ring Little | General |
| Motor Room Less | General |
| Minimum Reporting Limit | General |
| Mounted Rocket Launcher | General |
| Maximum Residual Limit | General |
| Maximum Residue Limit | General |
| Mahindra Renault Limited | General |
| Mecanism de Rulare Libera | General |
| Motor Racing Legends | General |
| Map Reading Lights | General |
| Manipulator Retention Latch | Governmental |
| MAROLI | Indian Railway Station |
| Minimum Risk Level | Medical |
| Mycology Research Laboratories | Medical |
| Mechatronics Research Laboratory | Medical |
| Medical Research Laboratory | Medical |
| Minimal Risk Levels | Medical |
| Magnetic Reference Laboratory | Medical |
| Might Reply Late | Messaging |
| Master Requirements List | Military and Defence |
| Materiel Requirements List | Military and Defence |
| Multiplerocket Launcher | Military and Defence |
| Montana RailLink Incorporated | Regional |
| Miners Lake, Queensland, Australia | Regional |
| Massanutten Regional Library | Regional |
| Midwest Regional League | Regional |
| Montana Rail Link | Regional |
| Manipulator Retention Latches | Space Science |
| Manipulator Retention Lock | Space Science |
| Material Requirements List | Space Science |
