| Mindfulness Based Interventions | Academic & Science |
| Mathematical Biosciences Institute | Academic & Science |
| MechanoBiology Institute | Academic & Science |
| Molecular Biology Institute | Academic & Science |
| Mbeya | Airport Code |
| Mekong Business Initiative | Business |
| Macklin Business Institute | Business |
| Management By Ignorance | Business |
| Molecular Biosciences Informatics | Business |
| Math Box, Inc. | Business |
| Modular Building Institute | Business |
| Memphis Business Interiors | Business |
| Management Buy In | Business Management |
| Mass Burn Incineration | Community |
| Maslach Burnout Inventory | Community |
| Moody Bible Institute | Community |
| Male Body Inspector | Community |
| Multi Beam Imaging | Computing |
| Mobile Business Intelligence | Computing |
| Measurement Block Index | Computing |
| Movimento Brasil Informatica | Computing |
| Machaneh Bonim Israel | General |
| Multi Bootable Information | General |
| Mechanism Based Inactivator | General |
| Mathematical Biosciences | General |
| Mobile Browser Interface | General |
| Moving Beyond Intractability | General |
| Montana Behavioral Initiative | General |
| Master Builders of Iowa | General |
| Medicare Beneficiary Identifier | General |
| Molecular Breast Imaging | General |
| Majlis Bandaraya Ipoh | General |
| Medicaid Buy In | General |
| Marrone Bio Innovations | General |
| Minimal Browser Interface | General |
| Montana Behavior Initiative | General |
| Mind and Body Integration | General |
| Metal Building Insulation | General |
| Mercedes Benz Italia | General |
| Mercedes Benz India | General |
| Mercedes Benz International | General |
| Mercedes Benz Institute | General |
| Motorbooks International | General |
| Master Ban Index | General |
| Masyarakat Bulutangkis Indonesia | General |
| Master Builder International | General |
| Massachusetts Broadband Institute | Governmental |
| Midwest Biodiversity Institute | Governmental |
| McIntire Business Institute | Governmental |
| Metropolitan Bureau of Investigation | Governmental |
| Military Ballistic Industries | Governmental |
| Mississippi Bureau of Investigation | Governmental |
| Microproducts Breakthrough Institute | Governmental |
| McKnight Brain Institute | Governmental |
| Metropolitan Business Institute | Governmental |
| Minimum Background Investigation | Governmental |
| Market Basket Index | Healthcare |
| MADHUBANI | Indian Railway Station |
| Mechanical Breakdown Insurance | Insurance |
| Mission Builders International | International |
| Minaj Broadcast International | International |
| Management Buy In Internet | Internet |
| Massachusetts Biomedical Initiatives | Medical |
| Major Budget Issue | Military and Defence |
| Microsoft Business Integrator | Softwares |
| Multibus Interface | Space Science |
| Mesquite Baseball Inc | Sports |
| Messianic Bureau International | Sports |
