| M.A. | Magisiter Artium (Master of Arts) |
| M.D | Doctor of Medicine |
| MA | Master of Arts |
| MASTER | Microwave Amplification by Stimulated Emission of Radiation |
| MBA | Master of Business Administration |
| MBBS | Bachelor of Medicine and Bachelor of Surgery |
| MBE | Member of the Order of the British Empire |
| MBT | Main Battle Tank |
| MCA | Monetary Compensatory Allowance/Master of Computer Application |
| MCC | Marylebone Cricket Club |
| MCI | Medical Council of India |
| MD | Doctor of Medicine |
| MFN | Most Favoured Nation |
| MI | Military Intelligence |
| MICR | Magnetic ink character recognition |
| MIDI | Musical Instrument Digital Interface |
| MIPS | Million Instructions per Second |
| MISA | Maintenance of Internal Security Act |
| MIT | Massachusetts Institute of Technology; Master Instruction Tape |
| MLA | Member of Legislative Assembly |
| MLC | Member of Legislative Council |
| MMTS | Multi Modal Transport Service |
| MNC | Multi-National Corporation |
| MODEM | modulator demodulator |
| MODVAT | Modified Value Added Tax |
| MP | Member of Parliament; Madhya Pradesh |
| MPEG | Motion Picture Experts Group |
| MRCP | Member of the Royal College of Physicians |
| MRCS | Member of Royal College of Surgeons |
| MRTPC | Monopoly and Restrictive Trade Practices Commission |
| MSEs | Micro and Small Enterprises |
| MSME |  Micro, Small and Medium Enterprises |
| MTCR | Missile Technology Control Regime |
| MVC | Maha Vir Chakra |
| NAAC | National Assessment and Accreditation Council |
| NABARD | National Bank for Agriculture and Rural Development |
| NACO | National AIDS Control Organisation |
| NAEP | National Adult Education Programme |
| NAFED | National Agricultural Co-operative Marketing Federation |
| NAFTA | North American Free Trade Agreement |
| NALCO | National Aluminium Company Ltd. |
| NAPP | Narora Atomic Power Plant |
| NASA | National Aeronautics and Space Ad­ministration |
| NASDAQ | National Association of Securities Dealers Automated Quotation |
| NASSCOM | National Association of Software and Service Companies |
| NATO | North Atlantic Treaty Organisation |
| NAV | Net Asset Value |
| NBCC | National Buildings Construction Corporation |
| NCCR | National Council for Civil Right |
| NCERT | National Council of Educational Research and Training |
| NCHER | National council for higher education and research |
| NCSA | National Centre for Supercomputing Applications; National Computer Security Association |
| NCTC | National Counter Terrorism Centre |
| NCW | National Commission for Women |
| NDA | National Defence Academy |
| NDDB | National Dairy Development Board (Anand, Gujarat) |
| NDF | National Defence Fund |
| NDMA |  National Disaster Management Authority |
| NEERI |  National Environment Engineering Research Institute |
| NEFA | North-East Frontier Agency |
| NEPA | National Environment Protection Authority |
| NFDC | National Film Development Corporation |
| NFL | National Fertilizer Limited |
| NGBRA | National Ganga River Basin Authority |
| NHEC |  National Health Entitlement Card |
| NHMEA |  National Health and Medical Facilities Accreditation Authority |
| NHRC | National Human Rights Commission |
| NIC |  National Innovation Council |
| NICO | New Information and Communication Order |
| NICRA  | National Initiative on Climate Resilient Agriculture |
| NIDC | National Industrial Development Corporation |
| NIMHANS | National Institute of Mental Health and Neuro-Sciences |
| NIN |  National Institute of Nutrition |
| NITlE | National Institute for Training in Industrial Engineering |
| NMDS | National Missile Defence System (US) |
| NMEP | National Malaria Eradication Programme |
| NOC | No Objection Certificate |
| NOIDA | New Okhla Industrial Development Authority |
| NPA | Non-performing Assets |
| NPC | National Productivity Council |
| NPP | National Population Policy |
| NPT | Nuclear Non-Proliferation Treaty |
| NRDC | National Research and Development Corporation |
| NREP | National Rural Employment Programme |
| NRF | National Renewal Fund |
| NRI | Non Resident Indian |
| NSC | National Security Council |
| NSG | National Security Guards |
| NSSO | National Sample Survey Organisation |
| NSUI | National Students Union of India |
| NTC |  National Transitional Council |
| NTPC | National Thermal Power Corporation |
| NUT | National Institute of Information Technology |