# Liste des sigles de l'AAR débutant par M
## M

* MAA - Magma Arizona Railroad
* MAAX - Maxx Leasing Company
* MACX - Mac Acquisitions
* MADU - Magnum Speditionsgelleshaft GMBH
* MAEU - Maersk Lines
* MAGX - Magnimet, Monroe Scrap Division
* MAIX - Macon Iron and Paper Stock, Inc.
* MAJU - Malaysian International Shipping Corporation
* MALX - Mid-America Locomotive and Car Repair, Inc.
* MALZ - American President Lines
* MANX - Manchester Gas Company; Williams Energy Ventures, Inc.
* MAPX - MAPCO Products Company; Williams Energy Ventures, Inc.
* MARX - MidAmerican Energy Corporation
* MARZ - MARTRAC
* MASX - GE Rail Services
* MATU - Matson Navigation Company
* MATX - Merchants Investment Company
* MATZ - Matson Navigation Company
* MAW - Maumee and Western Railroad
* MAXU - Maxu Containers, Ltd.
* MAXX - MidAmerican Energy Company
* MAYW - Maywood and Sugar Creek
* MB - Meridian and Bigbee Railroad; M&B Railroad
* MBBX - Tank Car Services, Inc.
* MBCX - M.B.C.X. Leasing, LLC
* MBFX - MBF Industries, Inc.
* MBIX - Morse Brothers, Inc.
* MBKX - MRC Rail Services, LLC
* MBLX - ExxonMobil Corporation
* MBPX - MacMillan-Bloedell, Inc.
* MBRR - Meridian and Bigbee Railroad
* MBSX - Mid-South Bulk Services, Inc.
* MBTX - Massachusetts Bay Transportation Authority
* MC - Michigan Central Railroad; New York Central Railroad; Penn Central; Conrail; Norfolk Southern (after Conrail breakup)
* MCCX - Mount Vernon Coal Transfer Company; Mount Vernon Transfer Terminal, LLC
* MCDX - Redland Worth Corporation; Sunbelt Cement, Inc.
* MCER - Massachusetts Central Railroad
* MCEU - Massachusetts Central Railroad
* MCEZ - Massachusetts Central Railroad
* MCHX - Trinity Rail Management, Inc.
* MCIX - Mobley Company, Inc. (Applied Chemicals Division)
* MCLR - McLaughlin Line Railroad
* MCLX - Morrison Car Leasing, Inc.
* MCMU - Management Control and Maintenance, SA
* MCMX - M C Rail Services, Ltd.
* MCPX - Monsanto Company; Solutia, Inc.
* MCR - McCloud River Railroad; McCloud Railway
* MCRR - Monongahela Connecting Railroad
* MCRX - Marcus Rail Transport
* MCRY - Mid Continent Railway
* MCSA - Moscow, Camden and San Augustine Railroad
* MCSU - China Ocean Shipping Company
* MCTA - Minnesota Central Railroad
* MCTX - Modern Continental Construction Company, Ltd.
* MCVX - Massachusetts Call/Volunteer Firefighters Association
* MD - Municipal Docks
* MDAX - Merchants Despatch Transportation Corporation
* MDCX - Mexicana De Cobre, SA de CV
* MDDE - Maryland and Delaware Railroad
* MDDX - Old Line Holding Company, Inc.
* MDIX - Modern Dispersions, Inc.
* MDKX - Gardau MRM Steel, Inc. (Mandak Metal Processors Division)
* MDLR - Midland Terminal Company
* MDP - Mexican Pacific Railroad (Ferrocarril Mexicano del Pacifico, SA)
* MDR - Kansas City Southern Railway
* MDS - Meridian Southern Railway
* MDSB - Burlington Northern Railroad
* MDSZ - Medspan Shipping Service, Inc.
* MDT - Merchants Despatch Transportation Corporation
* MDTX - Merchants Despatch Refrigerator Line
* MDW - Minnesota, Dakota and Western Railway
* MDWU - Minnesota, Dakota and Western Railway
* MDWZ - Minnesota, Dakota and Western Railway
* ME - Morristown and Erie Railway
* MEC - Maine Central Railroad; Guilford Rail System
* MECX - Trinity Rail Management, Inc.
* MEFX - MexFresh, LLC
* MEFZ - MexFresh, LLC
* MELX - Sunbelt Cement, Inc.
* MEPX - McGraw-Edison Company
* MERX - Merco
* MESX - Mears/CPG, Inc.
* MET - Modesto and Empire Traction Company
* METW - Municipality of East Troy Wisconsin
* METX - Northeast Illinois Regional Commuter Railroad Corporation (Metra)
* MF - Middle Fork
* MFCX - Farmers Coop Grain and Supply Company; First Union Rail
* MFFX - M4 Holdings, Ltd.
* MG - Mobile and Gulf Railroad
* MGA - Monongahela Railway; Norfolk Southern Railway
* MGGU - Marcevaggi, S.P.A.
* MGMX - J and J Partnership
* MGRI - MG Rail, Inc.
* MGRS - Ferrocarriles Nacionales de Mexico
* MGSX - Martin Gas Sales, Inc.; CF Martin Sulphur, LP
* MH - Mount Hood Railroad
* MHAX - United States Department of the Interior (Bureau of Mines Helium Field Operations)
* MHCO - Marquette and Huron Mountain Railroad
* MHFX - MHF Logistical Solutions, Inc.
* MHLX - General American Transportation Corporation
* MHM - Conrail
* MHQU - Military Sealift Command (Washington, DC)
* MHQZ - Military Sealift Command
* MHRX - Mile-High Railcar Services, Inc.
* MHWA - Mohawk, Adirondack and Northern Railroad
* MI - Missouri-Illinois Railroad; Missouri Pacific Railroad; Union Pacific Railroad
* MID - Midway Railroad
* MIDH - Middletown and Hummelstown Railroad
* MIDL - Midland Railway
* MIDX - MRC Rail Services, LLC
* MIEU - MI Engineering, Ltd.
* MIGN - Michigan Northern Railway
* MILW - Chicago, Milwaukee, St. Paul and Pacific Railroad (Milwaukee Road); Soo Line Railroad; Canadian Pacific Railway
* MILX - Milchem, Inc.; GE Rail Services Corporation
* MILZ - Soo Line Railroad, Canadian Pacific Railway
* MIMX - Minera Mexico International, Inc.
* MINE - Minneapolis Eastern Railway
* MINU - China Ocean Shipping Company
* MIPX - Millennium Petrochemicals, Inc.
* MIR - Minneapolis Industrial Railway
* MIRX - Regional Recycling, LLC
* MIS - Mississippi Central Railroad
* MISS - Mississippian Railway Cooperative, Inc.
* MISU - Malaysian International Shipping Corporation
* MISX - Milwaukee Solvents and Chemicals Corporation
* MJ - Manufacturers Junction Railway
* MJVU - Merco
* MKC - McKeesport Connecting Railroad
* MKCX - Morrison Knudsen Corporation
* MKFX - Century Rail Enterprises, Inc.
* MKIX - M-K Railroad Equipment Leasing Company; Morrison Knudsen Corporation
* MKT - Missouri-Kansas-Texas Railroad; Union Pacific Railroad
* MKTT - Missouri-Kansas-Texas Railroad; Union Pacific Railroad
* MKTZ - Union Pacific Railroad
* MLCU - N.Y.K. Line
* MLCX - American Refrigerator Transit Company
* MLD - Midland
* MLEX - Miles, Inc.
* MLHX - American Refrigerator Transit Company
* MLIX - Melbo Land and Investment Company
* MLLX - Montell USA, Basell USA, Inc.
* MLMX - Morrison Grain Company, Inc.; Metal Management, Inc.
* MLSX - Monsanto Company
* MLUX - Solutia, Inc.
* MMA - Montreal, Maine and Atlantic Railway
* MMAC - Montreal, Maine and Atlantic Railway
* MMAX - Martin Marietta Aluminum, Inc.; Martin Marietta Corporation
* MMBX - Martin Marietta Corporation; Master Builders, Inc.
* MMCU - CIE Des Messageries Maritimes
* MMCX - M&M Chemical Products, Inc.; TransMatrix, Inc.
* MMID - Maryland Midland Railway
* MMMU - Fesco Pacific Lines
* MMMX - Minnesota Mining and Manufacturing (3M)
* MMRR - Mid-Michigan Railroad
* MMRX - Double M Ranch Enterprises
* MMSX - Blue Circle, Inc.
* MMXZ - Murphy Motor Express, Inc.
* MN - Metro-North Commuter Railroad
* MNA - Missouri and Northern Arkansas Railroad
* MNAX - C and S Directional Boring, Inc.
* MNBR - M and B Railroad
* MNCW - Metro-North Commuter Railroad
* MNCX - Minnesota Corn Processors, Inc.
* MNJ - Middletown and New Jersey Railway
* MNLU - Malaysian International Shipping Corporation
* MNLX - ExxonMobil Corporation
* MNN - Minnesota Northern Railroad
* MNNR - Minnesota Commercial Railway
* MNPX - Morton Norwich Products, Inc.; Morton International, Inc.
* MNS - Minneapolis, Northfield and Southern Railway; Soo Line Railroad; Canadian Pacific Railway
* MNTX - Minnesota Transportation Museum
* MNWX - Minnesota Department of Public Service (Weights and Measures Division)
* MOBX - Mobil Oil Corporation; ExxonMobil Corporation
* MOC - Missouri Central Railroad
* MOCX - Missouri Portland Cement Company
* MOD - Missouri Pacific Railroad
* MOEX - Morgan Engineering; Indice MOEX Russie
* MOFX - Maxton Oil and Fertilizer Company
* MOGX - C.W. Brooks, Inc.
* MOHX - Monsanto Company; Solutia, Inc.
* MOLU - Mitsui O.S.K. Lines, Ltd.
* MOLX - International Molasses Corporation
* MON - Monon Railroad; Seaboard System Railroad; CSX Transportation
* MONX - Monsanto Company; Solutia, Inc.
* MOPZ - Flexi-Van Leasing
* MORZ - Mitsui O.S.K. Lines, Ltd.
* MOSX - Mosinee Paper Corporation
* MOSZ - Mitsui O.S.K. Lines, Ltd.
* MOT - Marine Oil Transportation
* MOTC - Montreal Tramways
* MOTU - Monsanto
* MOTX - Museum of Transportation
* MOTZ - Mitsui O.S.K. Lines, Ltd.
* MOWX - Fortaleza Construction Company
* MOXV - Moxahala Valley Railway
* MP - Missouri Pacific Railroad; Union Pacific Railroad
* MPA - Maryland and Pennsylvania Railroad; York Railway
* MPCX - Moyer Packing Company; Michels Pipeline Construction, Inc.
* MPEX - MotivePower Industries
* MPIT - Union Pacific Railroad
* MPIX - Myer's Propane Gas Service, Inc.; Motive Power, Inc.
* MPLI - Minnesota Prairie Line
* MPLX - GE Rail Services
* MPLZ - Union Pacific Railroad
* MPRX - Motive Power Equipment and Solutions, Inc.
* MPSX - Missouri Public Service
* MPTX - Procor, Ltd.
* MPU - Missouri Pacific Railroad, Union Pacific Railroad
* MPWX - Muscatine Power and Water
* MPZ - Union Pacific Railroad
* MQCX - Monarch Cement Company
* MQGX - Morrison-Quirk Grain Corporation
* MQPX - Millennium Inorganic Chemicals, Inc.
* MR - McCloud River Railroad; McLeod Railway
* MRAX - Mineral Range, Inc.
* MRCX - Evans Railcar Leasing Company; GE Rail Services Corporation
* MRDX - MidAmerican Energy Company
* MREX - Marshall Railway Equipment Corporation; Monad Railway Equipment Company
* MRHS - Midland Railway
* MRI - Mohall Railroad, Inc.
* MRL - Montana Rail Link
* MRMX - MRMX Leasing and Management, LLC
* MRR - Carolina Southern Railroad
* MRRX - General ElectricGE Rail Services
* MRS - Manufacturers Railway Company; Anheuser-Busch, Inc.
* MRSX - Mile-High Railcar Services, Inc.
* MS - Michigan Shore Railroad
* MSAZ - National Motor Freight Traffic Association
* MSC - Illinois Central Gulf Railroad
* MSCI - Mississippi Central Railroad
* MSCU - Mediterranean Shipping Company, SA
* MSCZ - Mediterranean Shipping Company, SA
* MSDR - Mississippi Delta Railroad
* MSE - Mississippi Export Railroad
* MSIX - Morton International, Inc.
* MSLC - Minnesota Short Lines Company
* MSMX - Mid South Milling Company
* MSN - Meeker Southern Railroad
* MSO - Michigan Southern Railroad
* MSPX - P4 Productions, LLC
* MSQU - Military Sealift Command (Bayonne (New Jersey))
* MSRC - Kansas City Southern Railway
* MSRW - Mississippian Railway Cooperative, Inc.
* MSTL - Minneapolis and St. Louis Railway; Chicago and North Western Railway; Union Pacific Railroad
* MSTR - Massena Terminal Railroad
* MSUU - USPCI, Inc.
* MSV - Mississippi and Skuna Valley Railroad
* MSWY - Minnesota Southern Railway
* MT - Mississippi and Tennessee RailNet
* MTAX - MTAX Corporation
* MTC - Mystic Terminal Company
* MTCO - Macon Terminal Company
* MTCX - Mallard Transportation Company
* MTCZ - Mayflower Transit and Storage
* MTDX - Midwest Transportation and Development Company
* MTFR - Minnesota Transfer Railway
* MTIU - Welfit Oddy (PTY), Ltd
* MTIZ - American Marine Industries
* MTLU - Montgomery Tank Lines
* MTLX - Metal Link International, LLC
* MTMU - March, Ltd.
* MTMX - Modern Track Machinery
* MTNX - Rocky Mountain Transportation Services
* MTPX - Montana Power Company
* MTR - Montour Railroad; Youngstown and Southern Railway
* MTRX - TransMatrix, Inc.
* MTSU - Marine Transport Service, Inc.
* MTTX - Trailer Train Company; TTX Company
* MTW - Marinette, Tomahawk and Western Railroad
* MTZ - Mitsui O.S.K. Lines, Ltd.
* MUSC - Memphis Union Station Company
* MVCX - Chaparral Energy, Inc.
* MVP - Missouri and Valley Park Railroad
* MVRY - Mahoning Valley Railway
* MVT - Mount Vernon Terminal
* MWAX - Martin Marietta Materials, Inc.
* MWBX - Midwest By-Products Company
* MWCL - Midwest Coal Handling, Inc.
* MWCX - Midwest Railcar Corporation
* MWHX - Markwest Hydrocarbon Partners, Ltd.
* MWLX - Midwest Locomotive Leasing and Sales, Inc.
* MWLZ - Madrigal-Wan Hai Lines Corporation
* MWMX - Midwest Mud Company, Inc.; Golden Leasing
* MWPX - Murco Wall Products, Inc.
* MWR - Muncie and Western Railroad
* MWRC - Mount Washington Railway
* MWRL - Molalla Western Railway; Hillvista Investment Company
* MWRR - Montana Western Railway
* MWRX - Midwest Rail Holdings, Inc.
* MWSX - Midwest Solvents Company, Inc.; GE Rail Services
* MWTT - Michigan-Wisconsin Transportation Company
* MXLU - Mexican Line
* MZIZ - Marko B Zanovich