| 項目 |
| M |
| M |
| M 判［medium size］ |
| M1 |
| M2 |
| M2+CD |
| M3 |
| MΩ［megohm］ |
| m |
| MA1［Kingdom of Morocco］ |
| MA2［mental age］ |
| MA3［message area］ |
| M.A.［Master of Arts］ |
| mA［milliampere］ |
| MAD1［Madrid］ |
| MAD2（マッド）［mutual assured destruction］ |
| MAD3［Republic of Madagascar］ |
| MAI［Multilateral Agreement on Investment］ |
| maj.［major］ |
| M & A［merger and acquisition］ |
| .man［manual］ |
| MAP（マップ）［Manufacturing Automation Protocol］ |
| MAR［Kingdom of Morocco］ |
| MARC（マーク）［machine-readable catalog］ |
| MAS［Malaysia］ |
| maser（メーザー）［microwave amplification by stimulated emission of radiation］ |
| MASH（マッシュ）［mobile army surgical hospital］ |
| MATIF［(フ) Marche a Terme International de France］ |
| MAW［Republic of Malawi］ |
| MAX［multi amenity express］ |
| max.［maximum］ |
| MB［megabyte］ |
| mb［(フ) millibar］ |
| MBA［Master of Business Administration］ |
| MBE［molecular beam epitaxy］ |
| MBO［managing by objectives］ |
| MC1［machining center］ |
| MC2［marginal cost］ |
| MC3［master of ceremonies］ |
| MC, M.C.4［Member of Congress］アメリカの，国会議員。特に下院議員。 |
| MC5［modular coordination］ |
| MC6［Principality of Monaco］ |
| Mc［megacycle］ |
| MCA1［Management Coordination Agency］ |
| MCA2［monetary compensatory amount］ |
| MCA3［multi-channel access system］ |
| MCCA［(ス) Mercado Comun Centroamericano］ |
| MCLS［（acute febrile）mucocutaneous lymph node syndrome］ |
| MCM［multichip module］ |
| MCO［Orlando］ |
| MD1［merchandising］ |
| MD2［mini disc］ |
| MD3［Republic of Moldova］ |
| Md［mendelevium］ |
| MDA［Republic of Moldova］ |
| MDAP［Mutual Defense Assistance Program］ |
| MDC［more developed country］ |
| MDF［medium density fiberboard］ |
| M.D.M.［(フ) Medecins du monde］ |
| MDV［Republic of Maldives］ |
| ME1［medical electronics］ |
| ME2［medical engineering］ |
| ME3［microelectronics］ |
| MEADS［medium extended air defense system］ |
| MEDLINE（メドライン）［MEDLARS On-Line］ |
| MEG［magnetoencephalogram］ |
| MEL［Melbourne］ |
| MEM［Memphis］ |
| MERCOSUR（メルコスール）［(ス) Mercado comun del sur］ |
| MeV（メブ）［million （mega) electron volts］ |
| MEX1［Mexico City］ |
| MEX2［United Mexican States］ |
| MF1［medium frequency］ |
| MF2［midfielder］ |
| MFA［Multinational Fiber Arrangement］ |
| MFN［most favored nation］ |
| MG1［myasthenia gravis］ |
| MG2［Republic of Madagascar］ |
| Mg［magnesium］ |
| mg［(フ) milligramme］ |
| MGL［Mongolia］ |
| MH1［Malaysia Airlines］ |
| MH2［Republic of the Marshall Islands］ |
| MHD［magnetohydrodynamics］ |
| MHD 発電［magnetohydrodynamic generation］ |
| MHz［megahertz］ |
| MI1［Midway Islands］ |
| MI2［Military Intelligence］ |
| mi［mile］ |
| MIA1［Miami］ |
| MIA2［missing in action］ |
| MIC1（ミック）［management of indirect costs］ |
| MIC2［military-industrial complex］ |
| MICOS（マイコス）［meteorological information confidential on-line system］ |
| MICS［Multi Integrated Cash Service］ |
| .mid［MIDI］ |
| MIDI（ミディ）［musical instrument digital interface］ |
| MiG（ミグ）［(ロ) Mikoyan i Gurevich］ |
| MIGA（ミガ）［Multilateral Investment Guarantee Agency］ |
| mil［mile］ |
| MIME（マイム）［Multipurpose Internet Mail Extention］ |
| min.1［minimum］ |
| min.2［minute］ |
| MIP［most important person］ |
| MIPRO（ミプロ）［Manufactured Imports Promotion Organization］ |
| MIPS（ミップス）［million instructions per second］ |
| MIRCEN［Microbiological Resource Center］ |
| MIS［management information system］ |
| Miss |
| MIT［Massachusetts Institute of Technology］ |
| MITI（ミティ）［Ministry of International Trade and Industry］ |
| MK 鋼［Mishima-Kizumi steel］ |
| MKD［The Former Yugoslav Republic of Macedonia］ |
| MKE［Milwaukee］ |
| MKO［Mujahidine Khalq］ |
| MKS 単位系［meter-kilogram-second unit］ |
| MKSA 単位系［meter-kilogram-second-ampere unit］ |
| ML［Republic of Mali］ |
| ml［(フ) millilitre］ |
| MLD［minimum lethal dose］ |
| MLI［Republic of Mali］ |
| MLS［microwave landing system］ |
| MLT［Republic of Malta］ |
| MM［The Union of Myanmar］ |
| MM21［Minato Mirai 21］ |
| mm［(フ) millimetre］ |
| MMA1［Metropolitan Museum of Art］ |
| MMA2［money market account］ |
| MMC［money market certificate］ |
| MMD［maximum mixing depth］ |
| MMDA［money market deposit account］ |
| MMF1［Money Management Fund］ |
| MMF2［money market fund］ |
| MMMF［money market mutual funds］ |
| MMR ワクチン［MMR-vaccine］ |
| MMU［memory management unit］ |
| MMVF［multimedia video file］ |
| MMX［multimedia extension］ |
| MN［Mongolia］ |
| MN 式血液型 |
| Mn［(ド) Mangan］ |
| MNC［multinational corporation］ |
| MNE［multinational enterprises］ |
| MNL［Manila］ |
| MNLF［Moro National Liberation Front］ |
| MO［Macao］ |
| MO ディスク［magnet-optical disk］ |
| Mo［(ド) Molybdan］ |
| MOx（モックス）［mixed-oxide］ |
| MODEM（モデム）［modulatordemodulator］ |
| MOF1［Minister of Finance］ |
| MOF2（モフ）［Ministry of Finance］ |
| MOF3［mixed oxide fuel］ |
| MOF4［multiple organ failure］ |
| MOF 勘定［Minister of Finance account］ |
| MOF 集中相場［Minister of Finance concentration rates］ |
| mol［(ド) Mol］ |
| MoMA（モーマ）［Museum of Modern Art］ |
| MON［Principality of Monaco］ |
| MOPR（モップル）［(ロ) Mezhdunarodnaya organizatsiya pomoshchi bortsam revolyutsii］ |
| MOR［middle of the road］ |
| MOS1［marine observation satellite］ |
| MOS2（モス）［metal-oxide semiconductor］ |
| MOS トランジスター［metal-oxide semiconductor transistor］ |
| MOS-IC［metal-oxide semiconductor-integrated circuit］ |
| MOS-LSI［metal-oxide semiconductor large-scale integrated circuit］ |
| MOSS（モス）協議［market-oriented sector-selective talks］ |
| MOT［Ministry of Transport］ |
| .mov［movie］ |
| MOZ［Republic of Mozambique］ |
| MP, M.P.1［Member of Parliament］イギリスの，国会議員。 |
| MP2［military police］ |
| MP3［Northern Mariana Islands］ |
| MP 盤［middle playing record］ |
| MPAA［Motion Picture Association of America］ |
| MPD1［maximum permissible dose］ |
| MPD2［Metropolitan Police Department］ |
| MPEG（エムペグ）［moving picture expert group］ |
| .mpg |
| m.p.h.［miles per hour］ |
| MPIS［multi-purpose information system］ |
| MPLA［(ポルトガル) Movimento Popular de Libertacao de Angola］ |
| MPP［massively parallel processing］ |
| MPR［(インドネシア) Madjelis Permusjawaratan Rakjat］ |
| MPT［Ministry of Posts and Telecommunication］ |
| MPU［microprocessing unit］ |
| MQ1［Martinique］ |
| MQ2［metol hydroquinone］ |
| MR1［Islamic Republic of Mauritania］ |
| MR2［marketing research］ |
| MR3［medical representative］ |
| MR4［motivation research］ |
| Mr.［mister］ |
| MR ヘッド［magneto-resistive head］ |
| MRA［malignant rheumatoid arthritis］ |
| MRF［money reserve fund］ |
| MRI1［magnetic resonance imaging］ |
| MRI2［Republic of Mauritius］ |
| mRNA［messenger RNA］ |
| MROM［mask read-only memory］ |
| MRP1［machine-readable passport］ |
| MRP2［material requirements planning］ |
| Mrs.（ミセス）［Mistress］ |
| MRSA［methicillin-resistant staphylococcus aureus］ |
| M.R.T.A.［(ス) Movimiento Revolucionario Tupac Amaru］ |
| MS1［Egyptair］ |
| MS2［medium shot］ |
| MS3［mission specialist］ |
| MS4［Montserrat］ |
| MS5［multiple sclerosis］ |
| M.S.［Master of Science］ |
| M/S［meters per second］ |
| Ms.（ミズ） |
| MSA1［Maritime Safety Agency］ |
| MSA2［Multilateral Steel Arrangement］ |
| MSA3［Mutual Security Act］ |
| MSAC（エムサック）［most seriously affected countries］ |
| MSC［Multimedia Super Corridor］ |
| MS-DOS［Microsoft disk operating system］ |
| M.S.F.［(フ) Medecins sans frontieres］ |
| MSI［medium-scale integration］ |
| M.S.I.［(イ) Movimento Sociale Italiano］ |
| MSN［Microsoft Network］ |
| MSO［multiple systems operator］ |
| MSP［Minneapolis］ |
| MSS［mass storage system］ |
| MST［(ポルトガル) Movimento dos Sem-Terra］ |
| MSW［medical social work］ |
| MT1［magnetic tape］ |
| MT2［manual transmission］ |
| MT3［master tape］ |
| MT4［medical technologist］ |
| MT5［megaton］ |
| MT6［Republic of Malta］ |
| MTA［medical technology assessment］ |
| MTB［mountain bike］ |
| MTBF［mean time between failures］ |
| MTCR［Missile Technology Control Regime］ |
| MTN1［Islamic Republic of Mauritania］ |
| MTN2［medium-term note］ |
| MTN3［Multilateral Trade Negotiation］ |
| MTO［Multilateral Trade Organization］ |
| MTR［multi-track recorder］ |
| MTS 系［meter-ton-second system］ |
| MTTR［mean time to repair］ |
| MTV［Music Television］ |
| MU［Republic of Mauritius］ |
| MUC［Munchen］ |
| MUF（マフ）［material unaccounted for］ |
| MUSE（ミューズ）［multiple sub-Nyquist sampling encoding］ |
| MUSE（ミューズ）デコーダー［multiple sub-Nyquist sampling encoding decoder］ |
| MV1［megavolt］ |
| MV2［motor vessel］ |
| MV3［Republic of Maldives］ |
| mV［millivolt］ |
| MVA［megavolt-ampere］ |
| MVP［most valuable player］ |
| MW1［megawatt］ |
| MW2［Republic of Malawi］ |
| MWD［megawatt-day］ |
| MX［United Mexican States］ |
| Mx［maxwell］ |
| MXP［Milano］ |
| MY［Malaysia］ |
| MYA［Union of Myanmar］ |
| MZ［Republic of Mozambique］ |