(Main list of acronyms)

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  • m – (s) Metre – Milli
  • M – (s) Mega- – One thousand (in Roman numerals)

MA

  • mA – (s) Milliampere
  • Ma – (s) Megaannum
  • MA
  • (s) Madagascar (FIPS 10-4 country code)
  • (i) Marijuana Anonymous
  • (i) Master of Arts
  • Massachusetts (postal symbol)
  • Megaampere
  • Morocco (ISO 3166 digram)
  • MAA – (i) Mathematical Association of America
  • MAAC – (a) Metro Atlantic Athletic Conference
  • MAC
  • (s) Macau (ISO 3166 trigram)
  • (a) U.S. Military Airlift Command (1966–1992)
  • Mid-American Conference
  • MACA – (i) Military aid to the civil authorities
  • MACE – (a) Multi-agent computing environment
  • MACHO – (p) Massive compact halo object
  • MAD
  • (a) Magnetic anomaly detector
  • (s) Moroccan dirham (ISO 4217 currency code)
  • (a) Mutual assured destruction
  • MADD
  • (a) Mothers Against Drunk Driving
  • Myoadenylate deaminase deficiency
  • (p) Multiply–add
  • MAF – (i) Maintenance action form
  • MAFF - (a) Ministry of Agriculture, Forestry and Fisheries (various countries)
  • MAGIC – (a) Major Atmospheric Gamma-ray Imaging Cherenkov (telescope)
  • MAGNETAR – (p) Metaprogrammable AGent NETwork ARchitecture
  • MAGTF – (i) Marine Air-Ground Task Force
  • mah – (s) Marshallese language (ISO 639-2 code)
  • Mahasz – (p) Magyar Hanglemezkiadók Szövetsége (Hungarian, "Association of Hungarian Record Companies")
  • mal – (s) Malayalam language (ISO 639-2 code)
  • MALD – (a) Miniature Air-Launched Decoy
  • MANPADS – (p) MAN-portable air defence system
  • MANPRINT – (p) Mapower and personnel integration
  • MAO
  • (i/a) Molėtų astronomijos observatorija (Molėtai Astronomical Observatory)
  • (p) Monoamine oxidase
  • MAOI – (p) Monoamine oxidase inhibitor
  • MAP – (a) Management action plan (corporate phrase)
  • MAPP - (a) Medical assistance premium program
  • MAPS – (a) Monitoring Avian Productivity and Survivorship
  • MAQS – (a) Museum of the American Quilter's Society ("max")
  • mar – (s) Marathi language (ISO 639-2 code)
  • MAR – (s) Morocco (ISO 3166 trigram)
  • MarBEF – (p) Marine biodiversity and ecosystem functioning<!--- http://www.marbef.org/ --->
  • MARC
  • (a) Machine readable cataloging (or machine readable code)
  • Mailing list archive
  • Maryland Area Regional Commuter train service
  • Massachusetts Animal Rights Coalition
  • Mid-America Regional Council
  • MARCENT – (p) United States Marine Forces Central Command
  • MARFORCC – (p) Marine Force Component Commander
  • MARINE (acronym) Muscles Are Required, Intelligence Not Evaluated- Used by Enlisted and Officer Ranks in the USMC
  • MARINES (acronym) My A** Rides In Navy Equipment, Sir! - Banter with Navy Personnel by Marines
  • MARRS – (a) Martyn Young, Alex Ayuli, Rudy Tambala, Russell Smith, and Steve Young (British electronic music act)
  • MAS – (i) NATO Military Agency for Standardization
  • MASAS – (a) Monte Agliale Supernovae and Asteroid Survey
  • Maser – (a) Microwave Amplification by Stimulated Emission of Radiation
  • MASH – (a) Mobile Army Surgical Hospital
  • MASINT – (p) Measurement And Signature Intelligence
  • MATREX – (p) Modeling Architecture for Technology, Research & EXperimentation
  • MATS – (a) U.S. Military Air Transport Service (1948–1966)
  • MAVS – (a/i) Mobile Artillery Vehicle System
  • MAW – (s) Malawi (IOC trigram, but not FIFA or ISO 3166)
  • MAX – (i) Meta-reasoning Architecture for "X"

MB

  • MB
  • (s) Manitoba (postal symbol)
  • Martinique (FIPS 10-4 territory code)
  • Medal of Bravery (Canada)
  • MBA
  • (i) Main Battle Area
  • Main Belt Asteroid
  • Master of Business Administration
  • MBI – (i) Moody Bible Institute
  • MBBL – (i) (U.S. Armor Center) Mounted Battlespace Battle Laboratory
  • MBCC – (i) Migratory Bird Conservation Commission (U.S.)
  • MBCS – (i) Multi-Byte Character Set
  • MBE
  • (p) Member of the Order of the British Empire
  • (i) Multistate Bar Examination (U.S.)
  • MBIDST – (i) Member of the British Institute of Dental and Surgical Technologists
  • MBM – (i) Meat and Bone Meal
  • MBR - (i) Master boot record
  • MbS – (i) Mohammad bin Salman (current crown prince of Saudi Arabia)
  • MBSE – (i) Model-based systems engineering
  • mbsf – metres below sea floor, a depth convention used in paleontology and oceanography
  • MBT – (i) Main Battle Tank
  • MBTA – (i) Massachusetts Bay Transportation Authority – Migratory Bird Treaty Act (U.S.)
  • MBTI – (i) Myers-Briggs Type Indicator

MC

  • mC – (s) Millicoulomb
  • MC
  • (s) Macau (FIPS 10-4 territory code)
  • (i) Master of ceremonies
  • (s) Megacoulomb
  • (i) Military Cross (bravery award)
  • (s) Monaco (ISO 3166 digram)
  • (i) Mortar carrier
  • (s) Eleven hundred (in Roman numerals)
  • MCA
  • (i) Master of Computer Applications
  • Micro Channel Architecture
  • Multichannel analyzer
  • Music Corporation of America, the original name of the now-defunct MCA Inc.
  • (i) Malaysian Chinese Association
  • MCC
  • (i) Marylebone Cricket Club
  • Mission control center
  • Motor control center
  • Movement control centre
  • MCD
  • (i) Minimal Cerebral Dysfunction
  • Minor civil division (U.S. Census term)
  • MCDL – (i) Model Composition Definition Language
  • MCFT – (i) Modified compression field theory
  • MCG – (i) Melbourne Cricket Ground
  • MC&G – (i) Mapping, charting, and geodesy
  • MCI – (i) Microwave Communications, Inc.
  • MCIS – (i) Mellon Collie and the Infinite Sadness
  • MCM – (i) Mine Counter-Measures
  • MCMV – (i) Mine Counter-Measure Vessel
  • MCNC
  • (i) Microelectronics Center of North Carolina
  • (i) Mixing Condensation Nucleus Counter
  • MCO
  • (i) Major Combat Operation
  • (s) Monaco (ISO 3166 trigram)
  • (s) Orlando International Airport (IATA code)
  • (i) Movement Control Officer
  • MCP
  • (i) Maintenance Collection Point
  • Male Chauvinist Pig
  • MCR – (i) My Chemical Romance
  • MCSF – (i) Marine Corps Security Forces
  • MCT – (i) Movement Control Team
  • MCTIS – (i) Mounted Co-operative Target Identification System
  • MCU
  • (i) Marine Corps University
  • Marvel Cinematic Universe
  • Medium close-up (camera direction in British TV scripts)
  • (p) Microcontroller unit
  • (i) Milk clotting units
  • Ming Chuan University
  • Minimum coded unit (digital imaging)
  • Multipoint control unit
  • Municipal Credit Union (New York)
  • MCWS – (i) Men's College World Series, the final phase of the NCAA Division I baseball tournament in the US

MD

  • Md – (s) Mendelevium
  • MD
  • (s) Fifteen Hundred (in Roman numerals)
  • Maryland (postal symbol)
  • (i) Medicinae Doctor (Doctor of Medicine/Medical Doctor)
  • Mentioned in Dispatches (military)
  • (s) Moldova (FIPS 10-4 country code; ISO 3166 digram)
  • MDA
  • (i) Main Defensive Action/Area
  • (s) Moldova (ISO 3166 trigram)
  • (i) Muscular Dystrophy Association
  • MDF
  • (i) Main distribution frame
  • Medium-density fiberboard
  • MDG
  • (s) Madagascar (ISO 3166 trigram)
  • (i) UN Millennium Development Goal
  • MDL – (s) Moldovan leu (ISO 4217 currency code)
  • MDM
  • (i) Michigan Dartmouth MIT telescope consortium
  • Master data management
  • MDMA – (i) MethyleneDioxy-MethylAmphetamine (also known as "Ecstasy")
  • MDNA – (p) Madonna's 12th studio album title (2012)
  • MDO – (i) Membership Driven Organisation
  • MDP – (i) Markov Decision Process
  • MDT – (i) Mountain Daylight Time (UTC−6 hours)
  • MDS
  • MDV – (s) Maldives (ISO 3166 trigram)
  • MDW
  • (s) Chicago Midway International Airport in Chicago (IATA airport code)
  • (i) Military District of Washington
  • (s) Minnesota, Dakota and Western Railway (AAR reporting mark)
  • (i) Mother’s Day Weekend

ME

  • Me – (s) Messerschmitt
  • ME
  • (s) Maine (postal symbol)
  • (i) Mechanical engineer[ing]
  • Medical examiner
  • Middle East
  • (s) Middle East Airlines (IATA code)
  • (i) Memory Effect – Myalgic Encephalomyelitis
  • MEA
  • (i) Maine Educational Assessment
  • Middle East Airlines
  • Millennium Ecosystem Assessment
  • Minimum en route altitude
  • Mono-ethanol Amine
  • Multilateral Environmental Agreement
  • MEAC – (a) Mid-Eastern Athletic Conference (ME-ac)
  • MEC
  • (s) Maine Central Railroad
  • Manta, Ecuador (IATA location identifier)
  • (i) Model European Council
  • Mountain East Conference
  • Mountain Equipment Co-op
  • MECC – (a) Minnesota Educational Computing Consortium (later Corporation, dissolved 1999)
  • MECCA – (a) Milwaukee Exposition Convention Center and Arena, a former name for the sports venue now known as UW–Milwaukee Panther Arena
  • MECO – (a) Main engine cutoff (NASA code for point in Space Shuttle ascent when three main engines are shut down prior to External Tank (ET) separation)
  • MEDEVAC – (p) Medical evacuation
  • MEDLI
  • (a) Mars Science Laboratory Entry, Descent, and Landing Instrumentation
  • (a) Medical & Scientific Libraries of Long Island
  • (a) Model for Effluent Disposal using Land Irrigation
  • MEDS – (a) Mission Essential Data Set
  • MEF
  • (i) U.S. Marine Expeditionary Force
  • Minimum essential facility
  • Mission essential force
  • MEG – (i) MagnetoEncephaloGraphy
  • MEI – (i) Matsushita Electric Industrial Co., Ltd.
  • MEK
  • (i) Magyar Elektronikus Konyvtar
  • Message encryption key
  • (a) methyl ethyl ketone
  • (p) Mujahideen al-Khalq
  • MEL
  • (i) Maya Embedded Language
  • Michigan Electronic Library
  • MELT – (a) Metallic Line/Loop Test (ing)
  • MEM
  • (i) Message Exchange Mechanism
  • (p) Microelectromechanical
  • MEMS – (p) Microelectromechanical System
  • MENA – (i/a) Middle East and North Africa ("MEE-na" or "MEH-na")
  • MEO
  • (a) Medium Earth orbit
  • Most efficient organization
  • MEP
  • (i) Mechanical Electrical Plumbing
  • Member of the European Parliament
  • Missions étrangères de Paris (French for "Paris Foreign Missions")
  • Model European Parliament
  • MER – (i) Mars Exploration Rover
  • MERL – (i) Mitsubishi Electric Research Laboratories
  • MES
  • (i) Marconi Electronic Systems
  • Medium Edison screw
  • MESSENGER – (p) MErcury Surface, Space ENvironment, GEochemistry and Ranging
  • MET
  • (p) Meteorological
  • (a) Middle European Time
  • METAR – (p) [Meteorological] Aviation Routine weather report
  • METL – (i/a) Mission Essential Task List ("mettle")
  • METOC – (p) Meteorological and Oceanographic
  • METT-T – (a/i) Mission, Enemy, Terrain, Troops, and Time available (mnemonic)
  • METT-TC – (a/i) Mission, Enemy, Terrain [and weather], Troops [and support], Time [available] and Civilian considerations (mnemonic)
  • MEU
  • (i) U.S. Marine Expeditionary Unit
  • Maximum Expected Utility
  • MeV – (s) Megaelectronvolt
  • MEV
  • (i) Medical Evacuation Vehicle
  • Musica Elettronica Viva
  • MEX – (s) Mexico (ISO 3166 trigram)
  • MEZ – (i) Missile Engagement Zone
  • MES – (a) Manufacturing Execution Systems

MF

  • mF – (s) Millifarad
  • MF
  • (s) Mayotte (FIPS 10-4 territory code)
  • Megafarad
  • (a) Motherf***er (profanity)
  • MFG - (s) Manufacturing
  • MFSB – (i) Mother, Father, Sister, Brother (1970s Philadelphia studio musicians collective)
  • MFT
  • (i) Managed file transfer
  • Master File Table
  • Mean field theory
  • Media Foundation Transform
  • Micro Four Thirds (camera design standard)

MG

  • mg – (s) Malagasy language (ISO 639-1 code) – Milligram
  • Mg – (s) Magnesium – Megagram
  • MG – (i) Machine Gun – (s) Madagascar (ISO 3166 digram) – (s) Major General – (s) Mongolia (FIPS 10-4 country code) – (i) Morris Garage
  • MGA – (s) Malagasy ariary (ISO 4217 currency code)
  • MGB – (i) Medium Girder Bridge, Motor Gun Boat
  • MGM – (i) Metro Goldwyn Mayer – (s) Montgomery, Alabama (Airport Code)
  • MGPAM – My Gym Partner's a Monkey
  • MGS – (i) Mobile Gun System

MH

  • mh – (s) Marshallese language (ISO 639-1 code)
  • mH – (s) Millihenry
  • MH
  • (s) Marshall Islands (postal symbol; ISO 3166 digram)
  • Megahenry
  • Montserrat (FIPS 10-4 territory code)
  • (s) Malaysia Airlines (IATA code)
  • MHC – (i) Major histocompatibility complex
  • MHEV – Micro-Hybrid Electric Vehicle
  • MHHW – (i) Mean Higher High Water (nautical charts)
  • MHL – (s) Marshall Islands (ISO 3166 trigram)
  • MHLW – (i) Mean Higher Low Water (nautical charts)
  • MHRA – (i) (UK) Medicines and Healthcare products Regulatory Agency
  • MHW – (i) Mean High Water (nautical charts)
  • MHWN – (i) Mean High Water Neaps (nautical charts)
  • MHWS – (i) Mean High Water Springs (nautical charts)
  • MHz – (s) Megahertz

MI

  • mi – (s) Māori language (ISO 639-1 code)
  • Mi – (s) Mebi
  • MI
  • (s) Malawi (FIPS 10-4 country code)
  • Michigan (postal symbol)
  • Midway Islands (ISO 3166 digram; obsolete 1986)
  • (i) Military Intelligence
  • MIA
  • (i) Missing In Action
  • Miami International Airport (IATA code)
  • MIAA
  • (i) Maryland Interscholastic Athletic Association
  • Massachusetts Interscholastic Athletic Association
  • Michigan Intercollegiate Athletic Association
  • Mid-America Intercollegiate Athletics Association
  • MIB
  • (i) Men In Black
  • Mint In Box (Internet auction/trading listings)
  • MIC
  • (i) Military Industrial Complex
  • (i) Malaysian Indian Congress
  • MICE – (a) Meetings, Incentives, Conferences, Exhibitions tourism
  • MICLIC – (p) Mine Clearing Line Charge
  • MICOM – (p) Missile Command
  • MICV – (i) Mechanised Infantry Combat Vehicle
  • MID – (s) Midway Islands (ISO 3166 trigram; obsolete 1986)
  • MIDI – (a) Musical Instrument Digital Interface
  • MIDAS – (a) Man-machine Integration Design and Analysis System
  • MIDS – (i) Multi-Function Information Distribution System
  • MIFC – (a) Military Industrial Financial Complex
  • MIFG – (s) Shallow Fog (METAR Code)
  • MIFPC – (a) Military Industrial Financial Pharmaceutical Complex
  • MIKE – (a) Monitoring of Illegal Killing of Elephants
  • MIL – (i) Man-In-the-Loop
  • MIL-AASPEM – (i) Man-In-the-Loop AASPEM
  • MILAN – (p) Missile d´infanterie léger antichar (French, "Anti-Tank Light Infantry Missile")
  • MiLB – (p) Minor League Baseball
  • MILC – (a) Mirrorless interchangeable-lens camera
  • MILES – (a) Multiple Integrated Laser Engagement System (live combat simulation)
  • MILF
  • (i) Moro Islamic Liberation Front
  • (a) Mother I'd Like to Fuck
  • MILSATCOM – (p) Military Satellite Communications
  • MILSET – (a) Mouvement International pour le Loisir Scientifique Et Technique (French, "International Movement for Leisure Activities in Science and Technology")
  • MILSTRIP – (p) Military Standard Requisitioning and Issue Procedure DLMSO MILSTRIP Manual
  • Mimaropa – (p) Mindoro, Marinduque, Romblon, Palawan (a region in the Philippines)
  • MIMOSA – (a) MIcroMeasurements Of Satellite Acceleration
  • MIMPT – (i) Member of the Institute of Maxillofacial Prosthetists and Technologists
  • MIP
  • (a) Multilateral Interoperability Programme
  • Multiple Identity Poster
  • MIPC – (a) Military Industrial Pharmaceutical Complex
  • MIRA – (a) MILAN Infra-Red Acquisition (thermal sight)
  • MIRV – (a) Multiple Independent Reentry Vehicle
  • MIS
  • (a) Management Information Systems
  • Museum Information System
  • MISREP – (p) Mission Report
  • MISSI – (a) Multilevel Information System Security Initiative
  • MIT
  • (i) Massachusetts Institute of Technology
  • methylisothiazoline
  • Milli Istihbarad Teskilati (Intelligence service of Turkey)
  • MITL – (i) Man-In-The-Loop
  • MITS – see entry

MJ

  • mJ – (s) Millijoule
  • MJ
  • (s) Megajoule
  • (i) Michael Jordan
  • (i) Michael Jackson
  • (i) Mary Jane Watson (Spider-Man character)
  • MJD – (i) Modified Julian Day
  • MJF – (i) Maxwell Jacob Friedman, American professional wrestler (who currently performs as "MJF")
  • MJP – (i) Military Judgement Panel

MK

  • mk – (s) Macedonian language (ISO 639-1 code)
  • mK – (s) Millikelvin
  • Mk - (s) Mark (US weapon designation), as in Mk 18 MOD 0 CQBR
  • MK
  • (s) Air Mauritius (IATA code)
  • Macedonia (ISO 3166 digram; FIPS 10-4 country code)
  • (i) Mandalskameratene (Norwegian football club)
  • (s) Megakelvin
  • (i) Milton Keynes
  • Missionary Kids
  • Mortal Kombat (1992 video game)
  • Mortal Kombat (2011 video game)
  • mkd – (s) Macedonian language (ISO 639-2 code)
  • MKD
  • (s) Macedonian denar (ISO 4217 currency code)
  • North Macedonia (ISO 3166 trigram)
  • MKG – (i) Michael Kidd-Gilchrist (American basketball player)
  • MKO – (i) Mojahedin-e-Khalq Organization (Persian, "People's Mujahedin of Iran")
  • MKS
  • (i) Metre–Kilogram–Second (system of units)
  • (p) MKS Inc. software company
  • MKSA – (i) Metre–Kilogram–Second–Ampere (system of units)
  • MKT
  • (i) Missouri-Kansas-Texas Railroad (1865–1989)
  • Mortal Kombat Trilogy
  • Short form of Marketing

ML

  • ml – (s) Malayalam language (ISO 639-1 code)
  • mL – (s) Millilitre
  • ML
  • (s) Mali (FIPS 10-4 country code; ISO 3166 digram)
  • (i) Maximum Likelihood
  • (s) Megalitre
  • MLA
  • (i) 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
  • (i) Major League Baseball
  • (s) Melbourne Orlando International Airport (IATA code)
  • MLC – (i) Member of the Legislative Council (in India)
  • MLE – (i) Maximum likelihood estimation
  • mlg – (s) Malagasy language (ISO 639-2 code)
  • MLG
  • (i) Major League Gaming
  • (i) Main Landing Gear
  • MLHW – (i) Mean Lower High Water (nautical charts)
  • MLI – (s) Mali (ISO 3166 trigram)
  • MLK – (i) Martin Luther King Jr.
  • MLL – (i) Major League Lacrosse
  • MLLW – (i) Mean Lower Low Water (nautical charts)
  • MLP – My Little Pony
  • MLR
  • (i) Medical Loss Ratio
  • MLRS – (i) Multiple-Launch Rocket System
  • MLS
  • (i) Major League Soccer
  • Multiple Listing Service
  • Multilevel security
  • MLSE
  • (i) Maple Leaf Sports & Entertainment (owner of several Toronto-based sports teams)
  • Maximum likelihood sequence estimation
  • MLSR – (i) Missing, Lost or Stolen Report
  • mlt – (s) Maltese language (ISO 639-2 code)
  • MLT – (s) Malta (ISO 3166 trigram)
  • MLVW – (i) Medium Logistics Vehicle, Wheeled
  • MLW
  • (i) Major League Wrestling (American professional wrestling promotion)
  • Mean Low Water (nautical charts)
  • MLWN – (i) Mean Low Water Neaps (nautical charts)
  • MLWS – (i) Mean Low Water Springs (nautical charts)

MM

  • mm – (s) Millimetre
  • Mm – (s) Megametre
  • MM – (i) Military Medal – (s) Myanmar (ISO 3166 digram) – Two Thousand (in Roman numerals)
  • MMA – (i) Mixed martial arts – Moving Mechanical Assembly
  • MMC – (p) Machinist's Mate, Chief (USN rating) – (i) Materiel Management Centre
  • MMCM – (p) Machinist's Mate, Master Chief (USN rating) – (i) Magnetic Mine Counter Measure
  • MMCS – (p) Machinist's Mate, Senior Chief (USN rating)
  • MMEV – (i) Multi-Mission Effects Vehicle
  • MMI – (i) Man-Machine Interface
  • MMI – (i) McLean Meditation Institute
  • MMIC – (i) Mindfulness & Meditation Instructor, Certified
  • MMIC – (i) McLean Meditation Institute Certified
  • MMI – (i) Magical MonkeyZ Inc.
  • MMIO – (i) Memory-mapped I/O
  • MMK – (s) Burmese kyat (ISO 4217 currency code)
  • MMO – (i) Massively Multiplayer Online (computer game)
  • MMOR – (i) Master of Management in Operations Research
  • MMORPG – (i) Massively multiplayer online role-playing game
  • MMPR – Mighty Morphin Power Rangers
  • MMR – (i) Measles, Mumps and Rubella vaccine – (s) Myanmar (ISO 3166 trigram)
  • MMS – (i) Multimission Modular Spacecraft
  • MMU – (i) Manchester Metropolitan University – (i) Manned Manoeuvring Unit
  • MMW – (p) Millimetre Wave (radar, from "mm Wave")

MN

  • mn – (s) Mongolian language (ISO 639-1 code)
  • mN – (s) Millinewton
  • Mn – (s) Manganese
  • MN – (s) Meganewton – Minnesota (postal symbol) – Monaco (FIPS 10-4 country code) – Mongolia (ISO 3166 digram)
  • MNB – (p) Multinational Brigade
  • MNB C – (p) Multinational Brigade Centre (KFOR)
  • MND – (i) Motor Neurone Disease – (p) Multinational Division
  • MNE – (s) Montenegro (ISO 3166 trigram)
  • MNG – (i) Multiple-image Network Graphics – (s) Mongolia (ISO 3166 trigram)
  • MNMF – (i) Multi-National Maritime Force
  • MNP – (s) Northern Mariana Islands (ISO 3166 trigram)
  • MNS – (i) Mission Needs Statement
  • MNT – (p) Molecular nanotechnology – (s) Mongolian tugrik (ISO 4217 currency code)

MO

  • mo – (s) Moldovan language (ISO 639-1 code)
  • Mo – (s) Molybdenum
  • MO – (s) Macau (ISO 3166 digram) – (i) Medical Officer – (s) Missouri (postal symbol) – (i) modus operandi (Latin, "mode of operation") – (s) Morocco (FIPS 10-4 country code) [mutual oral]
  • MOA – Museum of Art (Brigham Young University)
  • MOAB – (a) Massive Ordnance Air Blast (official) – Mother Of All Bombs (slang)
  • MOB – (i) Man Over Board – Marching Owl Band – Movable Object Block
  • MOC – (i) Macedonian Orthodox Church – Measure Of Capability – Mission Operations Centre – My Own Creation (Lego)
  • MOCAS – (a) Mechanization Of Contract Administration Services
  • MoD – (i) Ministry of Defence (United Kingdom) and various other countries
  • MOD – (i) Magneto-optical disc – Masters of Deception – Minimum Object Distance – Multiple Organ Dysfunction
  • MoDAF – (p) Ministry of Defence Architecture Framework ("moh-daff")
  • modem – (p) Modulator-Demodulator
  • ModSAF – (p) Modular Semi-Automated Forces (military simulation)
  • Moe – (a) Marvel of entertainment
  • MOE – (i) Measure Of Effectiveness
  • MOF – (a/i) Ministry of Finance (Japan)
  • MOFA – (a/i) Ministry of Foreign Affairs (Japan)
  • MOH – (a/i) Medal of Honor – Music On Hold
  • MOID – (i) Minimum Orbital Intersection Distance
  • MOJWA – (i) Movement for Oneness and Jihad in West Africa
  • mol – (s) Moldovan language (ISO 639-2 code) – mole (unit)
  • MOLO – (a) Mobile Other Licensed Operator (UK)
  • MoM – (a) Multiple of the median
  • MOM – (a) Message-oriented middleware
  • MOM – (a) Master's Degree in Oriental medicine
  • MoMA – (a) Museum of Modern Art (NYC)
  • mon – (s) Mongolian language (ISO 639-2 code)
  • MOND – (p) Modified Newtonian Dynamics
  • MOO – (i) Measure Of Outcome
  • MOOTW – (p) Military Operations Other Than War ("moot-double-you")
  • MOP – (s) Macau pataca (ISO 4217 currency code) – (i) Measure Of Performance
  • MOPE – (a) Ministry of Population and Environment (Nepal) – Most Oppressed People Ever (politics)
  • MOPP – (i/a) Mission-Oriented Protective Posture
  • MORP – (a) Meteorite Observation and Recovery Project
  • MORS – (i) Military Operations Research Society
  • MOS – (i) Military Occupational Specialty – (a) Mit Out Sound / Motor Only Sync – (i) Mobile Object System – Model Output Statistics – Multiplayer Online Services - (a) Mean Opinion Score
  • MOS-CQ - (a) Mean Opinion Score - Conversational Quality (ITU-T P.800.1)
  • MOS-LQ - (a) Mean Opinion Score - Listening Quality (ITU-T P.800.1)
  • MOSFET – (a) Metal-Oxide-Semiconductor Field-Effect Transistor
  • MOSS – (p) MObile Submarine Simulator – (a) Moving Object Support System
  • MOT – (i) Ministry of Transport (UK)
  • MOTA – (i) Member of the Orthodontic Technicians Association
  • MOTESS – (a) Moving Object and Transient Event Search System
  • MOTO – (a) Mail Order / Telephone Order – Master of the obvious
  • MOU – (i) Memorandum Of Understanding
  • MOUT – (i) Military Operations in Urban[ized] Terrain
  • MOVES – (a) Modeling, Virtual Environments, and Simulation Institute
  • MOW – (i) Maintenance of way (also MW)
  • MOZ – (s) Mozambique (ISO 3166 trigram)

MP

  • MP – (i) Magic points – (s) Mauritius (FIPS 10-4 country code) – (i) Member of Parliament – Military Police – Missouri Pacific – (s) Northern Mariana Islands (postal symbol; ISO 3166 digram)
  • mPa – (s) Millipascal
  • MPa – (s) Megapascal
  • MPA - Master of Public Administration
  • MPA – (i) Maritime Patrol Aircraft
  • MPAA – (i) Motion Picture Association of America
  • MPC – (i) Minor Planet Center – Minor Planet Circular
  • MPC – (i) Military Payment Certificate
  • MPEC – (i) Minor Planet Electronic Circular
  • MPEG – (a) Motion Pictures (Coding) Experts Group
  • MPEV – (i) Multi-Purpose Engineering Vehicle
  • MPF – (i) Maritime Prepositioning Force
  • MPFC – (i) Medial PreFrontal Cortex
  • MPG - (i) Miles Per Gallon
  • MPMC – (i) Medial PreMotor Cortex
  • MPSI – (i) Member of the Pharmaceutical Society of Ireland
  • MPSoC – (i) MultiProcessor System-on-Chip
  • MPSRON – (p) Maritime Propositioning Ship Squadron

MQ

  • MQ
  • (s) Martinique (ISO 3166 digram) – Midway Islands (FIPS 10-4 territory code)
  • (s) Multi-mission Unmanned Aerial Vehicle (US tri-service aircraft designator)

MR

  • mr – (s) Marathi language (ISO 639-1 code)
  • MR – (s) Mauritania (FIPS 10-4 country code; ISO 3166 digram)
  • (i) Model Railroader Magazine
  • MR-ATGW – (i) Medium-Range Anti-Tank Guided Weapon
  • MRAV – (i) Multi-Role Armoured Vehicle
  • MRBM – (i) Medium Range Ballistic Missile
  • MRC – (i) Maintenance Requirements Card
  • MRD – (i) Motorized Rifle Division
  • MRE – (i) Meal Ready to Eat (U.S. military rations)
  • MRGO – (i) Mississippi River–Gulf Outlet Canal (also referred to as MR-GO or "Mr. Go")
  • MRGW – (i) Medium-range guided weapon
  • mri – (s) Māori language (ISO 639-2 code)
  • MRI – (i) Magnetic resonance imaging
  • MRL – (i) Multiple rocket launcher
  • (i) Montana Rail Link
  • MRO
  • (i) Maintenance, repair and operations
  • Mars Reconnaissance Orbiter
  • (s) Mauritanian ouguiya (ISO 4217 currency code)
  • MRPharmS – (i) Member of the Royal Pharmaceutical Society (Great Britain)
  • MRR – My Restaurant Rules
  • MRS – (i) Magnetic Resonance Spectroscopy
  • MRSA – (i/a) Methicillin-resistant Staphylococcus aureus (sometimes pronounced "MER-sa")
  • MRT
  • (i) Mass Rapid Transit — used as either an official or unofficial name for metro systems in Singapore, Kaohsiung, Bangkok, Taipei, Chennai, and Delhi
  • (s) Mauritania (ISO 3166 trigram)
  • MRTFB – (i) U.S. Major Range and Test Facility Base

MS

  • ms
  • (s) Malay language (ISO 639-1 code)
  • Millisecond
  • mS – (s) Millisiemens
  • Ms – (s) Megasecond
  • MS
  • (i) mano sinistra (Latin, "left hand")
  • (p) manuscript
  • (i) Master of Science
  • (s) Megasiemens
  • (p) Microsoft (sometimes M$)
  • (s) Mississippi (postal symbol)
  • Montserrat (ISO 3166 digram)
  • (i) Multiple Sclerosis
  • M&S
  • (i) Modelling & Simulation
  • Marks & Spencer
  • MSA – (s) Malay language (ISO 639-2 code)
  • MSB
  • (i) Main Support Battalion
  • Most Significant Bit (or Byte)
  • MSD – (i) Minimum Safe Distance
  • MSDB – (i) Multi Source Data Base
  • MSDE
  • (i) Maryland State Department of Education
  • (p) Microsoft Data[base] Engine
  • Microsoft SQL Server 2000 Desktop Engine
  • (i) Military Scenario Development Environment
  • Mission Simulation Dynamic Engine
  • MSDL – (i) Military Scenario Definition Language
  • MSE – (i) Multiple Subscriber Element
  • MSFS - (i) Microsoft Flight Simulator (flight simulator series)
  • MSEC – (p) Message Security Encryption Code ("emm-sec")
  • MSG
  • (i) MonoSodium Glutamate
  • Madison Square Garden (either the 1879, 1890, 1925, or current versions of the venue)
  • MSH
  • (i) Medium Support Helicopter
  • Mount St. Helens
  • MSI
  • (i) Micro-Star International
  • (p) Multispectral imagery
  • MSIE
  • (i) Microsoft Internet Explorer
  • Master of Science in Industrial Engineering
  • MSL
  • (i) Mars Science Laboratory
  • Mean Sea Level
  • (p) Missile
  • MSLP – (i) Mean Sea Level Pressure
  • MSM
  • (p) Mainstream media
  • (i) Men who have sex with men
  • Mount St Mary's School
  • MSN
  • (i) Microsoft Network
  • Master of Science in Nursing
  • MSNBC – (i) Microsoft National Broadcasting Company Cable news channel (see also msnbc.com)
  • MSO – (i) Multiple System Operator
  • MSP
  • Member of the Scottish Parliament
  • (i) Minneapolis–Saint Paul - Twin cities in Minnesota
  • (s) Minneapolis–Saint Paul International Airport (IATA code)
  • MSPA
  • (p) Migrant and Seasonal worker Protection Act
  • (a) MS Paint Adventures
  • MSPB – (i) Merit Systems Protection Board
  • MSR
  • (i) Main Supply Route
  • Module Service Record
  • (s) Montserrat (ISO 3166 trigram)
  • (i) Motor Schlepp Regulung
  • Mountain Safety Research (outdoor supplies manufacturer)
  • MSSA
  • Member of the Order of the Star of South Africa
  • (i) Methicillin-susceptible Staphylococcus aureus
  • (i) Military Selective Service Act
  • (i) Military-style semi-automatic
  • (i) Mind Sports South Africa
  • (i) Montreal Student Space Associations
  • MSSA Chemical Company, formerly known as Métaux Spéciaux.
  • MST
  • (i) Madison Symmetric Torus
  • Mountain Standard Time (UTC−7 hours)
  • Maastricht Aachen Airport (IATA code)
  • MST3K or MST3k – (i) Mystery Science Theater 3000
  • MSU
  • (i) Michigan State University
  • Montana State University
  • Mountain State University
  • Lomonosov Moscow State University (Russia, a.k.a. MGU)

MT

  • mt – (s) Maltese language (ISO 639-1 code)
  • mT – (s) Millitesla
  • Mt – (s) Meitnerium
  • MT
  • (s) Malta (FIPS 10-4 country code; ISO 3166 digram)
  • Megatesla
  • Montana (postal symbol)
  • (i) Motor Transport (military)
  • MTA
  • (i) Metropolitan Transportation Authority (Boston) (now Massachusetts Bay Transportation Authority)
  • Metropolitan Transportation Authority
  • MTBF – (i) Mean time between failures
  • MtF – (i) Male-to-female transsexual
  • MTF
  • (i) Magnetized target fusion
  • Medical Treatment Facility
  • Message Text Format
  • Modulation transfer function (optics)
  • MTG – (i) Magic: The Gathering
  • MTL
  • (s) Maltese lira (ISO 4217 currency code)
  • (i) Mean Tide Level (nautical charts)* MTM – (i) Methods-Time Measurement
  • MTOE – (p) Modified Table of Organization and Equipment ("emm-toe")
  • MTP
  • (i) Maritime Tactical Publication
  • Materiel Transfer Plan
  • Mission Training Plan
  • MTQ – (s) Martinique (ISO 3166 trigram)
  • MTR
  • (i) Main and Tail Rotor (helicopter type)
  • Mass Transit Railway (Hong Kong metro system)
  • Military-Technological Revolution
  • MTS
  • (i) Maintenance Training System
  • Manitoba Telephone System and Manitoba Telecom Services, former names of Bell MTS
  • Michigan Terminal/Timesharing System
  • Movement Tracking System
  • Multichannel television sound
  • Multi-Technical Services
  • MTT – (p) Methylthiazol tetrazolium (assay)
  • MTU
  • (i) Tankovei Mostoukladchik (Russian Танковый Мостоукладчик, "Tank Bridge-Layer") †
  • (i) Motoren- und Turbinen-Union (German engine manufacturer, now split into MTU Friedrichshafen and MTU Aero Engines)
  • MTV
  • (i) MainosTeleVisio (Finnish commercial TV company)
  • Music TeleVision
  • MTVL – (i) Mobile Tracked Vehicle, Light
  • MTWS – (i) MAGTF Tactical Warfare System

MU

  • MU
  • (s) Mauritius (ISO 3166 digram)
  • (s) Oman (FIPS 10-4 country code; from Muscat)
  • Manchester United (British football club)
  • MUA
  • (i) Meritorious Unit Award
  • Military Utility Assessment
  • (i) Make-up Artist
  • MUR – (s) Mauritius rupee (ISO 4217 currency code)
  • MUS – (s) Mauritius (ISO 3166 trigram)

MV

  • mV – (s) Millivolt
  • MV – (s) Maldives (FIPS 10-4 country code; ISO 3166 digram) – Megavolt – (i) Motor Vehicle – Motor Vessel
  • MVC – (i) Missouri Valley Conference
  • MVFC – (i) Missouri Valley Football Conference
  • MVNO – (i) Mobile virtual network operator
  • MVP – (i) Most Valuable Player
  • MVR – (s) Maldivian rufiyaa (ISO 4217 currency code)

MW

  • mW – (s) Milliwatt
  • MW
  • (i) Maintenance of way (also MOW)
  • (s) Malawi (ISO 3166 digram)
  • (i) Medium Wave (radio)
  • (s) Megawatt
  • (i) Mountain West (Conference) (formal initialism since July 2011)
  • MWC
  • (i) Maritime Warfare Centre (various nations)
  • Mountain West Conference (still used informally, although the league has adopted "MW")
  • MWESH – (p) Machismo Wizards Extended SHelter (operating system)
  • MWI – (s) Malawi (ISO 3166 trigram)
  • MWK – (s) Malawian kwacha (ISO 4217 currency code)
  • MWOA – (i) Mount Wilson Observatory Association
  • MWR – (i) Morale, Welfare, and Recreation
  • MWTB - (a) Mounted Warfare Test Bed

MX

  • MX – (a) Mail Exchange – (s) Mexico (FIPS 10-4 country code; ISO 3166 digram) – (p) Missile eXperimental
  • MXN – (s) Mexican peso (ISO 4217 currency code)

MY

  • my – (s) Burmese language (ISO 639-1 code)
  • MY – (s) Malaysia (FIPS 10-4 country code; ISO 3166 digram)
  • mya – (s) Burmese language (ISO 639-2 code) – (i) million years ago
  • MYOB – (i) Mind Your Own Business
  • MYR – (s) Malaysian ringgit (ISO 4217 currency code)
  • MYS – (s) Malaysia (ISO 3166 trigram)
  • MYT – (s) Mayotte (ISO 3166 trigram)

MZ

  • MZ – (i) Mach-Zehnder (interferometer) – (s) Magnetic Azimuth – (i) Move, Zig (Zero Wing) – (s) Mozambique (FIPS 10-4 country code; ISO 3166 digram)
  • MZN – (s) Mozambique metical (ISO 4217 currency code)

References