| 項目 | 
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] |