| Acronym | Meaning |
| MIDAS | Man-machine Integration Design And Analysis System |
| MIDI | Musical Instrument Digital Interface |
| MIDS | Multi-Function Information Distribution System |
| MIFG | Shallow Fog (METAR Code) |
| MIKE | Monitoring Of Illegal Killing Of Elephants |
| MIL | AASPEM -Man-In-the-Loop AASPEM |
| MIL | Man-In-the-Loop |
| MILAN | Missile D?infanterie L?ger Antichar (French |
| MILES | Multiple Integrated Laser Engagement System (live Combat Simulation) |
| MILF | Moro Islamic Liberation Front -Mother I'd Like To Fuck |
| MILSATCOM | Military Satellite Communications |
| MILSET | Mouvement International Pour Le Loisir Scientifique Et Technique (French |
| MILSTRIP | Military Standard Requisitioning And Issue Procedure |
| MIMAROPA | Mindoro |
| MIMOSA | MIcroMeasurements Of Satellite Acceleration |
| MIMPT | Member Of The Institute Of Maxillofacial Prosthetists And Technologists |
| MIP | Multilateral Interoperability Programme - Multiple Identity Poster |
| MIRA | MILAN Infra-Red Acquisition (thermal Sight) |
| MIRV | Multiple Independent Reentry Vehicle |
| MIS | Management Information Systems - Museum Information System |
| MISREP | Mission Report |
| MISSI | Multilevel Information System Security Initiative |
| MIT | Massachusetts Institute Of Technology - Methylisothiazoline - Milli Istihbarad Teskilati (Intelligence Service Of Turkey) |
| MITL | Man-In-The-Loop |
| MITS | See Entry |
| MJ | Megajoule |
| MJ | Millijoule |
| MJD | Modified Julian Day |
| MJP | Military Judgement Panel |
| MK | Air Mauritius (IATA Code) - Macedonia (ISO 3166 Digram; FIPS 10-4 Country Code) -Mandalskameratene (Norwegian Football Club) -Megakelvin -Missionary Kid - Mortal Kombat (game) |
| MK | Macedonian Language (ISO 639-1 Code) |
| MK | Millikelvin |
| MKD | Macedonian Denar (ISO 4217 Currency Code) - Republic Of Macedonia (ISO 3166 Trigram) |
| MKD | Macedonian Language (ISO 639-2 Code) |
| MKO | Mojahedin-e-Khalq Organization (Arabic People's Mujahedin Of Iran) |
| MKS | Metre-Kilogram-Second (system Of Units) -MKS Inc. Software Company |
| MKSA | Metre-Kilogram-Second-Ampere (system Of Units) |
| MKT | Missouri-Kansas-Texas Railroad (1865-1989) - Mortal Kombat Trilogy |
| ML | Malayalam Language (ISO 639-1 Code) |
| ML | Mali (FIPS 10-4 Country Code; ISO 3166 Digram) -Maximum Likelihood -Megalitre |
| ML | Millilitre |
| MLA | Martial Law Administration Of Bangladesh - Master Of Landscape Architecture - Medical Library Association - Member Of Legislative Assembly - Modern Language Association - Mutual Legal Assistance Treaty - Myelosis Leucemica Acuta |
| MLB | Major League Baseball |
| MLC | Member Of The Legislative Council (in India) |
| MLE | Maximum Likelihood Estimation |
| MLG | Malagasy Language (ISO 639-2 Code) |
| MLHW | Mean Lower High Water (nautical Charts) |
| MLI | Mali (ISO 3166 Trigram) |
| MLK | Martin Luther King |
| MLL | Major League Lacrosse |