| Media Resource Centre | Academic & Science |
| Multi-Resolution Curve | Academic & Science |
| Mathematics Research Center | Academic & Science |
| Muddy Rain Conditions | Academic & Science |
| Middle Region Care | Academic & Science |
| Metadata Research Center | Academic & Science |
| Media Research Center | Academic & Science |
| Molecular Research Center | Academic & Science |
| Magnetic Resonance in Chemistry | Academic & Science |
| Microbiology Research Centre | Academic & Science |
| Medical Research Consultants | Academic & Science |
| Microelectronics Research Center | Academic & Science |
| Managing Research for Companies | Academic & Science |
| Monthly Recurring Charge | Accounts and Finance |
| Columbia (tn) | Airport Code |
| Marine Research Corporation | Business |
| Model Rectifier Corporation | Business |
| Modern Rate Of Change | Business |
| Modellers Rectumfryer Corporation | Business |
| Mendocino Redwood Company | Business |
| Mercantile | Business |
| Morguard Corporation | Business |
| Mineral Commodities, LTD. | Business |
| Management Resources College | Business |
| Marketing Resource Center | Business |
| Monoid Ring Completion | Chemistry |
| Multi-resistant Coating | Chemistry |
| Michigan Radio Cluster | Community |
| Media Resource Center | Community |
| Medical Research Charities | Community |
| Membership Renewal Credit | Community |
| Minority Resource Center | Community |
| Magic Rave Crew | Community |
| Marmara Research Center | Community |
| Member Representatives Committee | Community |
| Melbourne Racing Club | Community |
| Midcoast Recreation Center | Community |
| Mixed Raster Content | Computer and Networking |
| Militarized Reconfigurable Computer | Computer Hardware |
| Macintosh Resource File | Computing |
| Maintenance Requirement Card | Computing |
| Misprediction Recovery Cache | Computing |
| Magneto Resistive Cluster | Computing |
| Mini Remote Control | Computing |
| Multi Rate Optics Card | Computing |
| Mailbox Recovery Center | Computing |
| Minimum Resolvable Contrast | Computing |
| Microsoft Research Cambridge | Computing |
| Metadata Retrieval Client | Computing |
| Moon Rocket Coin | Cryptocurrency |
| MeroeChain | Cryptocurrency |
| Maximum Reservoir Contact | Earth Science |
| Mount Royal College | Educational Institute |
| Mixed Refrigerant Cycle | Electronics |
| Bibliographic Data (machine-readable Cataloging Records) | File Type |
| Michigan Rotary Club | General |
| Motor Racing Club | General |
| Milford Road Course | General |
| Motordata Research Consortium | General |
| Maserati Resource Centre | General |
| Mando Research and Development China | General |
| Muscel Racing Contest | General |
| Motorsport Racing Canada | General |
| Mazda Retro Classic | General |
| Malaysian Rally Championship | General |
| Medieval Recreation Club | General |
| Malicious Rucus Crew | General |
| Mail Recovery Center | General |
| Math Resource Center | General |
| Manufacturing Resource Corporation | General |
| Mars Real Chocolate | General |
| Multicultural Refugee Coalition | General |
| Minnesota Recovery Connection | General |
| Mechanical Repair Coverage | General |
| Magnetic Ride Control | General |
| Mazda Radar Cruise Control | General |
| Mazda Rotary Club | General |
| Media Resources Center | General |
| Momthrian Regulatory Commission | General |
| Media Rights Capital | General |
| Manufacturers Resource Center | General |
| Minnesota Resource Center | General |
| Memory Re Call | General |
| Mass Rating for Charging | General |
| Micronised Refined Carbons | General |
| Max Rowan and Charlie | General |
| Multicultural Resource Center | General |
| Maintenance Requirement Cards | General |
| Mean Reverting Correlation | General |
| Microwave Radio Communications | General |
| Municipal Regional County | Governmental |
| Mississippi River Commission | Governmental |
| Managed Review Committee | Governmental |
| Medical Reserve Corps of the United States Public Health Service | Governmental |
| Media Rating Council | Governmental |
| Midwest Recycling Center | Governmental |
| Municipal Review Committee | Governmental |
| Mattress Recycling Council | Governmental |
| Ministry Resource Center | Governmental |
| Marine Resources Council | Governmental |
| Merchant Risk Council | Governmental |
| Machinery Repairman Chief Petty Officer | Governmental |
| MARICHETHAL | Indian Railway Station |
| Medical Research Council (UK) | International |
| Municipal Reforms Cell | Karnataka Government |
| Multi Resolution Curves | Maths |
| Mathematics Research Communities | Maths |
| Maganti Ravindranath Chowdary | Maths |
| Medical Research Council | Medical |
| Mutant Research Centre | Medical |
| Meat Research Corporation ( Australia) | Medical |
| Medican Research Council | Medical |
| Magnetic Resonance Cholangiography | Medical |
| Magnetic Resonance Cisternography | Medical |
| Magnetic Resonance Colonography | Medical |
| Medical Registration Council | Medical |
| Mitochondrial Respiratory Chain | Medical |
| Mitral Ring Calcification | Medical |
| Multilocular Renal Cyst | Medical |
| Massachusetts Rehabilitation Commission | Medical |
| Medical Reserve Corps | Medical |
| Map Reference Code | Military and Defence |
| Major Regional Conflict | Military and Defence |
| Materiel Release Confirmation | Military and Defence |
| Malaria Research Centre | Ministry of Health and Family Welfare Organization |
| Minimal Remanent Change | Physics Related |
| Mobile Range Communications | Radio Science |
| Milwaukee Repeater Club | Radio Science |
| Minimum of Rows and Columns | Softwares |
| Mid Roll Change | Space Science |
| Material Review Crib | Space Science |
| Measurement Requirements Committee | Space Science |
| Minuteman Racing Club | Sports |
| Monthly Recurring Charges | Telecommunication |
