Tokamak (Culham, UK), MathML, Mathematical Markup Language, MATLAB, Matrix Laboratory (Software), MAU, Million Accounting Units (Europ. Raumfahrt; 1988: 1 MAU ,  1,14 Mill.$), MAXIMA, Millimeter Anisotropy Experiment Imaging Array (Ballon-Experiment), MBB, Messerschmitt-Bölkow-Blohm GmbH, München, MBE, Molecular-Beam Epitaxy, MBI, Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie (Berlin-Adlershof), MBO, Management Buy Out, MBSL, Multi-Bubble Sonoluminescence, Mehrblasenlumineszenz, MC, Monte-Carlo (Simulation), MCAO, Multiconjugate Adaptive Optics, MCB, Media Control Board, MCCM, Meterology Climate Chemistry Model, MCD, Magnetic Circular Dichroism, MCD, Mobile Communication Division, MCDAD, Magnetic Circular Dichroism in Angular Distribution, MCFC, Molten Carbonate FC (?), MCG, Magneto-Cummulative Generator, MCHA, Music and Concert Hall Acoustics (International Symposium), MCM, Multi-Chip Module, MCO, Mars Climate Observer, MCP, Microchannel Plate, Mikrokanalplatte, Vielkanalplattendetektor, MCPC, Multiple Channel per Carrier (Telekommunikation), MCS, Mathematics Subjects Classification, MCSCF, Multi-Configuration Self-Consistent-Field (-Rechnung, Molekülphysik), MCT, Mobile Communications Terminal, MCU, Master Controller Unit, MD, Maryland (US-Staat), MD, Medical Doctor, MDAQ, Mediation and Data Acquisition (Telekommunikation), MdB, Mitglied der Bundestages, MDC, Max-Delbrück-Centrum für Molekulare Medizin (Berlin-Buch), MdEP, Mitglied des Europäischen Parlaments, MDF, mitteldichte Faserplatte, MDI, Diphenylmethylendiisocyanat, MDI, Michelson Doppler Imager (an Bord von SOHO), MdL, Mitglied des Landtages, MDOF, Multi-Degree-of-Freedom (System), MDR, Multi-Drug Resistance (Gene), MDV, Medizinische Datenverarbeitung, ME, Magnitude Error (Telekommunikation), ME, Maine (US-Staat), ME, Millenium Edition (Microsoft Windows), ME, Mobile Entity (Telekommunikation), MEET, Man Models for Simulation of Electromagnetic, Elastomechanic and Thermic Behaviour of Man, MEFX, Multiple Error Filtered-x (Algorithm), MEG, Magnet(o)enzephalographie, Magnetoencephalography, MELCO, Mitsubishi Electric Corporation, MELDOQ, Melanomdokumentierung und -quantifizierung, MELECON, Mediterraneau Electrotechnical Conference, MELP, Mixed Excitation Linear Prediction (Sprachcodierung), MEM, Maximum Entropy Method, MEMS, Micro-Electro-Mechanical Systems, MEO, Medium Earth Orbit, MEOSS, Monocular Electro-Optical Stereo Scanner, MER, Modulation Error Rate, MERIS, Medium Resolution Imaging Spectrometer, MERLIN, Multi-Element Radio Linked Interferometer (Astrophysik), MES, Manufacturing Execution System, MESA, Microsystems and Engineering Science Application (Albuquerque, NM, USA: geplant für 2004), MESFET, Metal Semiconductor Field Effect Transistor, MET, Memory Enhancement Technology, META, Megachannel Extraterrestrial Assay (Suche nach außerirdischer Intelligenz), METRIC, Exploitation of Bibliometric Data in National Bibliographic Databases, MeXe, Mobile Station Execution Environment (Telekommunikation), MEXH, Multiple-Energy X-Ray Holography, MF, Medium Frequency (0,3 - 3 MHz), MFC, Microsoft Foundation Classes, MFLAME, Multi-Function Future Laser Atmospheric Equipment (Brite Euram Project), MFM, Magnetic Force Microscopy, MFP, Multi Function Peripheral, MfS, Ministerium für Staatssicherheit (DDR), MFS, Multi-BSS Fast Packet Server (Telekommunikation), MG, Media Gateway (Telekommunikation), MGC, Media Gateway Controller (Telekommunikation), MGCP, Media Gateway Control Protocol (Telekommunikation), MGC, Micro-Gap Gas Counter, MGS, Mars Global Surveyor, MGU, (Moskauer Staatliche Universität), MHB, Magnus-Haus Berlin (DPG), MHC, Major Histocompatibility Complex (Biochemie), MHD, Magnetohydrodynamic (Fusionsreaktortechnik), MIB, Managament Information Base, MI, Michigan (US-Staat), MIC, Mikroelektronik Centret (DK-Lyngby), MIC,  IASTED International Conference on Modelling, Identification and Control, MIDI, Musical Instruments Digital Interface, MIF, Makrophagen-Inhibitionsfaktor, MIIR, Méthode d'isolement et d'identification des résonances, MIL,  Department of Defense (Internet, USA), MILCOM, Military Communications Conference, MIMD, Multiple Instruction / Multiple Data (Parallelrechner), MIME, Multipurpose Internet Mail(ing) Extension(s), MIMIC, Monolithic Microwave Integrated Circuits, MIMO, Multiple Input - Multiple Output (Controller, System), MIMOS, Miniaturisiertes Mößbauer-Spektrometer, MINUET, Minnesota Internet User's Essential Tool (Rechnernetz-Server), MIO, Modular I/O (HP), MIPS, Million instructions (Mega-Instructions) per second, MIPS, Münchner Informationszentrum für Proteinsequenzen, MIRV, Multiple Independently Targetable Reentry Vehicles, MIS, Management Information System, MISACT, Multiple Interacting Sensors and Actuators, MISIM, Metal-Isolator-Semiconductor-Isolator-Metal, MISO, Multiple Input - Single Output (Controller, System), MISR, Multiangle Imaging Spectro-Radiometer (Satelliten-Erd-Fernerkundung), MIT, Management Information Tree, MIT, Massachusetts Institute of Technology, MIT, minimal-invasives Therapieverfahren, MITI,  Institut für Minimalinvasive therapeutische Interventionen (TU München), MITI, Ministry of International Trade and Industry (Japan), MIUH, Medizinisches Institut für Umwelthygiene (Düsseldorf), MKG, Magnetokardiographie, mks, Meter - Kilogramm - Sekunde (Maßsystem), ML, Maximum Likelihood, MLC, Mobile Location Center (Telekommunikation), MLCF, Maximum Likelihood Confidence Factor, MLO, Mycoplasma-like Organism, MLP, Multi-Layer Perceptron, MLS, Mikrowellenlandesystem, MLTU, Monitoring and Line Transmission Unit (Telekommunikation), MMAS, MultiMedia Application Server (Telekommunikation), MMC, Maintainance, Monitoring and Control, MMC, Multimedia Multiparty Conferencing, MMCF, Multimedia Communication Forum, MMCOI, Multimedia Communication Comments of Interest, MMCS, MultiMedia Call Server (Telekommunikation), MMIC, Monolithic Microwave Integrated Circuit(ry), MMCOM, Mobile Millimeter Communications (IEEE Workshop), MMS, Manufacturing Message Standard, MMS, Mission Management System, MMSE, MultiMedia Services Environment (Telekommunikation), MMSE, Minimum Mean Square Error, MMT, Monolithic Mirror Telescope (University of Arizona), MMU, Memory Management Unit, MMX, Multi Media Extensions, MN, Minnesota (US-Staat), MNPQ, Meß-, Normen-, Prüf- und Qualitätswesen, MNT, Mononitrotoluol, MNU, Deutscher Verein zur Förderung des mathematischen und naturwissenschaftlichen Unterrichts, MO, Missouri (US-Staat), MoBIC, Mobilität für Blinde durch die Interaktion mit einem Computer, MOCVD, Metalorganic Chemical Vapor Deposition, MODFET, Modulation-Doped Field Effect Transistor, Modulations-dotierter Feldeffekt-Transistor, MODIS, Moderate Imaging Spectroradiometer (Satelliten-Erd-Fernerkundung), MOE, Molecular Operating Environment, MOEL, Mittel- und Osteuropäische Länder, MOEMS, Micro-Opto-Electromechanical System (Telekommunikation), MOLA, Mars Orbiter Laser Altimeter, MOLI, Microsoft Online Learning Institute, MOMBE, Metallorganische Molekularstrahlepitaxie, MOMS, Modularer Optoelektronischer Multispektral-Scanner, MOPA, Master Oscillator Power Amplifier (Telekommunikation), MOPITT, Measurement of Pollution in the Troposphere (Satelliten-Erd-Fernerkundung), MOS, Mean Opinion Score (Telekommunikation), MOS, Metal-Oxide Semiconductor, MOS, Monitor-Server, MOSA, Ministry of Science and the Arts (Israel), MOSFET, Metalloxid-Silicium-Feldeffekt-Transistor Metal Oxide Field-Effect Transistor Semiconductor, MOSIS, MOS Implementation System, MOST, Ministry of Science and Technology (Korea), MOT, Magneto-Optic Trap, MOU, Memorandum of Understanding, MOVIC, International Conference on Motion and Vibration Control, MOVPE, Metalorganic Vapor Phase Epitaxy, MOX, Mixed-Oxide Fuel, Mischoxid (Kernreaktor), MP, North Mariana Island (US Mail), MPAe, Max-Planck-Institut für Aeronomie (Lindau/Harz), MPC, Model Predictive Control(ler), MPDR, Multipoint Digital Radio (Telekommunikation), MPE, Max-Planck-Institut für extraterrestrische Physik (Garching), MPE, Maximum Permissible Exposure, MPEG, Motion (oder: Moving) Pictures Expert Group (Bildcodierung), MPG, Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V., MPI, Max-Planck-Institut, MPI, Message Passing Interface (Parallelrechner), MPI, Multi-Photonen-Ionisation, MPIC, Max-Planck-Institut für Chemie (Mainz), MPIF, Max-Planck-Institut für Festkörperforschung (Stuttgart), MPIRE, Massively Parallel Interactive Rendering Environment, MPIZ, Max-Planck-Institut für Züchtungsforschung (Köln), MPL, Mars Polar Lander, MPLS, Multi-Protocol Label Switching (Rechnernetze), MP.lambda.S, Multi-Protocol Lambda Switching (optische Telekommunikation), MPM, Microstructured Photonic Material, MPMP, Microwave Point to Multipoint (Telekommunikation), MPMS, Magnetic Property Measurement System, MPOA, Multi-Protocol over ATM (Rechnernetze), MPP, Massively Parallel Processing (Rechner), MPQ, Max-Plack-Institut für Quantenoptik (Garching), MPR, Multi-Path Routing (Telekommunikation), MPS, Max Planck Society (MPG in englischen Texten), MPS, Mission Planning System, MPT, Ministry of Post and Telecommunications (Japan), MP3, MPEG Layer 3, MQW, Multiple Quantum Well, MR, Magnetresonanz (-Tomographie), MRA, Mutual Recognition Arrangement (Metrologie), MRAM, Magnetic Random Access Memory, MRAO, Mullard Radio Astronomy Observatory (?), MRBM, Medium-Range Ballistic Missile, MRF, Magnetorheological Fluid, MRF, Media Resource Function (Telekommunikation), MRFM, Magnetic Resonance Force Microscope (und: ... Microscopy), MRI, Magnetic Resonance Imaging, MRM, Magnetresonanz-Mikroskopie, mRNA, Messenger RNA, MRO, Maintenance, Repair and Overhaul, MRP, Material Resource Planning, MRS, Materials Research Society (USA), MRS, Media Ressource Service (SIPI), MRT, Magnetresonanz-Tomographie, MS, Mass Spectrometry, M.S., Master of Science, MS, Member State, MS, Mississippi (US-Staat), MS, Mobile Station (Telekommunikation), M/S, Master/Slave, MSAM, Multi-Service Access Multiplexer (Telekommunikation), MSAS, Multi-Function Transport Satellite-Based Augmentation System (Telekommunikation), MSC, Message Sequence Chart (Telekommunikation), MSC, Mobile (Services) Switching Centre (Telekommunikation), MSD, Mass Selective Detector, MS-DOS, Microsoft Disk Operating System, MSE, Mission Success Evaluation, MSE, Mean Square Error, MSG, Meteosat Second Generation (geplant für 2000), MSGC, Micro-Strip Gas Detector, MSI, Medium Scale Integration, MSISDN, Mobile Station ISDN Number, MSK, Minimum (oder: Maximum) Shift Keying (Datenübertragung), MSM, Metal-Semiconductor-Metal (Photodetektoren), MSN, Microsoft Network (Datennetz), MSN, Moscow Society of Naturalists, MSN, Multi-Service Node (Telekommunikation), MSOP, Mini Small Outline Package (SMD-Gehäuse), MSP, Multiplex Section Protection, MSRI, Mathematical Science(s) Research Institute (Berkeley, CA), MS-SPRING, Multiple Section Protection Ring (Telekommunikation), MSS, MAN Switching System, MSS, Mass Storage System, MSS, Mobile Satellite System (Telekommunikation), MS-SP, Multiple Section - Section Protection (Telekommunikation), MS-SPRING, Multiple Section Shared Protection Ring (Telekommunikation), MST, Mikrosystemtechnik, MSTV, Maximum Service Television, MSU, Michigan State University (USA), MSW, Media Switch, MSY, Maximal Sustained Yield (Ökonomie), MT, Montana (US-Staat), MTBF, Mean Time Before Failure (oder: Between Failures), MTCR, Missile Technology Control Regime, MTF, Modulation Transfer Function, MTG, Marine-Technik-Gesellschaft (Hamburg), MTG, Mikroelektronik- und Technologiegesellschaft (Ostdeutschland), MTJ, Magnetic Tunnel Junction, MTMOS, Methyl-Trimethoxysilane, MTN, Mountain (US Mail), MTN, Multilateral Trade Negotiations, MTP, Message Transfer Part, MTS, Methods for Testing and Specification (TC im ETSI), MTSat, Multifunctional Transport Satellite, MTTR, Mean Time To Repair (oder: Restore) (Telekommunikation), MUD, Multi User Dungeon (oder: Dimension, oder: Dialog) (Rechnernetz-Spiele), MuK, Medien- und Kommunikationswissenschaft, MURA, Midwest University Research Association (USA), MUSC, Microgravity User Support Center (DLR, Köln-Porz), MUSE, Multiple Sub-Nyquist-Sampling Encoding, MUSIC, Multiple Signal Classification, MUSICAM, Masking Pattern Adapted Universal Subband Integrated Coding and Multiplexing (Digitalrundfunk), MVIP, Multi-Vendor Integration Protocol (Telekommunikation), MVST, Multilayer Vertically Stacked Capacitors, MWK, Ministerium für Wissenschaft und Kunst, MWNT, Multi Wall Nanotubes, MXCD, magnetischer Röntgenzirkulardickroismus, M-Z, Mach-Zehnder (Interferometer, Modulator), MZI, Mach-Zehnder-Interferometer, M2E, Mouth-to-Ear (Telekommunikation), N, NA, Network Aspects (TC im ETSI), NA, Normenausschuß, NAB, National Association of Broadcasters of America, NACA, National Advisory Committee for Aeronautics (USA), NACCH, Network Access and Connectivity Channel (Datenübertragung), NACCB, National Accreditation Council for Certification Bodies (UK), NACP, National Aids Coordination Program (?) (Simbabwe), NAD, Network Access Domain (Telekommunikation), NAD, Network Application Division (Telekommunikation), NAE, National Academy of Engineering (USA), NAFTA, North American Free Trade Area, NAG, Numerical Algorithms Group (UK), NAH, Nearfield Acoustic Holography, NAHSC, National Automated Highway System Consortium (San Diego, CA, USA), NALS, Normenausschuß Akustik, Lärmminderung und Schwingungstechnik, NAMAS, National Measurement Accreditation Service (UK), NAMUR, Normenausschuß Meß- und Regeltechnik, NAO, Nordatlantische Oszillation (Wetter), NAP, Network Access Point (Internet), NARIC, National Academic Recognition Information Centre (EU), NARPA, National Advanced Research Projects Agency, NAS, National Academy of Sciences (USA), NAS, Network Access Server (Telekommunikation), NAS, Scandinavian Acoustical Society , NASA, National Aeronautics and Space Agency (USA), NASP, National Aerospace Plane, NA/STAG, Network Aspects/Security Techniques Advisory Group (TC im ETSI), NAT, Network Address Translation (Telekommunikation), NAT, Nitric Acid Trihydrate (HNO3·3(H2O)), NATLAS, National Testing Laboratory Accreditation Service (UK), NATO, North-Atlantic Treaty Organization, NB, Narrowband, NB, Normal Burst (Telekommunikation), NBI, Neutral-Beam Injection (Fusionsreaktortechnik), NBMA, Non-Broadcast Multiple Access, NB-RAS, Narrowband Remote Access Server (Telekommunikation), NBRF, National Biomedical Research Foundation (USA), NBS, National Bureau of Standards (USA), NC, Network Computer, NC, North Carolina (US-Staat), NC, Numeric Control, NCA, Netherlands Centre on Animal Use, NCAC, National Council of Acoustical Consultants (USA), NCAR, National Center for Atmospheric Research (Boulder, CO, USA), NCC, National Computing Centre (UK), NCC, Network Control Centre (Datennetz), NCEJ, Noise Control Engineering Journal, NCI, National Cancer Institute (Bethesda, MD, USA), NCI, Non-Coded Information (?), NCP, National Contact Point (ESPRIT), NCRP, National Council on Radiation Protection and Measurements (USA), NCS, Natural Color System, NCS, Network Control System (Datennetz), NCSA, National Center for (oder: of) Supercomputing Applications (USA), NCSA, National Sound and Communications Association (USA), NCSU, North Carolina State University, ND, North Dakota (US-Staat), NDC, Normalized Device Coordinates, NDDO, New Drug Development Office (Amsterdam, EORTC), NDE, Non-Destructive Evaluation, NDRC, National Defense Research Committee (USA), NDSC, Network for Detection of Atmospheric Change, NDSU, North Dakota State University, NDT, Nondestructive Testing, NE, Nebraska (US-Staat), NE, Network Element (Telekommunikation), NEA, Near Earth Asteroid, NEACP, National Emergency Airborne Command Post, NED, NASA Extragalactical Database, NEDLIB, Networked European Deposit Library, NEI, Niedrig-Energie-Institut, NEL, National Engineering Laboratory (UK), NEL, Network Element Layer (Telekommunikation), NEMS, Nano-Electro-Mechanical Systems, NEO, Near-Earth Orbit, NERC, National Environment Information Centre (UK), net, Network Organization (Internet, USA), NEW, National Engineers Weck, NEX, Narita Express (Zug zwischen Airport und Tokio), NEXT, Near-End Crosstalk, NEXUS, Network of Excellence on Multifunctional Microsystems, NF, Noise Factor, NFS, Network File System, NGC, New General Catalogue (Astronomie), NGDLC, Next Generation Digital Loop Carrier (Kommunikation), NGF, Nerve Growth Factor, NGL, Next Generation Lithography, NGSO, Non-Geostationary Satellite Orbit, NGST, Next Generation Space Telescope (Nachfolger des Hubble-Teleskops, geplant), NH, New Hampshire (US-Staat), NHCA, National Hearing Conservation Association (USA), NHK, Nippon hoso kyokai (Japan Broadcasting Corporation), NHMFL, National High Magnetic Field Laboratory (Tallahassee, FL, Los Alamos, NM), NIAS, Netherlands Institute for Advanced Study in the Humanities and Social Sciences, NIC, Network Information Center, NIC, Network Interface Card, NIC, John von Neumann Institute for Computing (Jülich), NICHD, National Institute of Child Health and Human Development (Bethesda, MD, USA), NID, Network Integration Division (Telekommunikation), NIEHS, National Institute of Environmental Health Sciences (USA), NIF, National Ignition Facility (Lawrence Livermore National Laboratories, USA), NIFS, National Institute for Fusion Science (Toki City, Japan), NIH, National Institute of Health (USA), NILEG, Niedersächsische Landesentwicklungsgesellschaft, NILU, Norwegisches Institut für Luftuntersuchungen, NIMA, National Imagery and Mapping Agency (USA), NiMH, Nickel-Metal Hydride (Akku), NIOSH, National Institute of Occupational Safety and Health (USA), NIR, Near-Infrared, NIRIM, National Institute for Research of Inorganic Materials (?) (Japan), NIRV, Nederlands Instituut voor Ruimtevaart, NIS, New Independent States (frühere Sovietunion), NISO, National Information Standards Organization (USA), NIST, National Institute of Standards and Technology (USA, vormals NBS), N-ISUP, Narrowband ISDN User Part (Telekommunikation), NIT, Network Information Table, Nitinol, Nickel-Titanium intermetallic compound developed by the Naval Ordnance Laboratory (1963), NJ, New Jersey (US-Staat), NJIT, New Jersey Institute of Technology, NJP, New Journal of Physics, NK, Nationalkomitee für Kristallographie, NKWD, Narodny Kommissariat Wnutrennich Del (sowjetischer Geheimdienst), NLC, Next Linear Collider, NLCTA, Next Linear Collider Test Accelerator, NLE, Non-Linear Effect, NLfB-GGA, Niedersächsisches Landesamt für Bodenforschung - Geowissenschaftliche Gemeinschaftsaufgaben (Hannover), NLR, Nationaal Lucht- en Ruimtevaartlaboratorium, NLR, Noise Level Reduction, NM, Network Manager (Telekommunikation), NM, New Mexico (US-Staat), NM, Neuer Markt, NMC, Network Management Centre