| MIFAO | Mémoires publiés par les Membres de l'Institut francais d'Archéologie orientale | In French | → Archeology |
| MiGoe | Astronomische Mitteilungen der Universitäts-Sternwarte zu Göttingen | In German | → Astronomy |
| MiI | Microelectronics International | In English | → Electronics |
| MIMPE | Modern Instrumentation and Measurements in Physics and Engineering | In English | → Astronomy |
| MinDe | Mineralium Deposita | In Latin | → Mineralogy |
| MinM | Mineralogical Magazine | In English | → Mineralogy |
| MinPe | Mineralogy and Petrology | In English | → Mineralogy → Petrology |
| MinPh | Mineral Physics | In English | → Mineralogy |
| MIO | Mitteilungen des Instituts für Orientforschung | In German | → Language, linguistics, literature → Geography, biography, history |
| MiRe | Microelectronics Reliability | In English | → Electronics |
| MisSp | Missiles Spacecraft | In English | → Military engineering → Spaceflight engineering, astronautics |
| MiZur | Astronomische Mitteilungen der Eidgenössischen Sternwarte Zürich | In German | → Astronomy |
| MJPS | Moldavian Journal of the Physical Sciences | In English | → Physics |
| MKAtl | Astrophysics Monographs University of Chicago Press | In English | → Astronomy |
| MLear | Machine Learning | In English | → Artificial intelligence |
| MMAAR | Maria Mitchell Association Annual Report | In English | → Astronomy |
| MMAI | Monuments et Mémoires publiés par l'Académie des Inscriptions et Belles-Lettres | In French | |
| MMAS | Mathematical Methods in the Applied Sciences | In English | → Mathematics → Engineering, technology |
| MmASI | Memoirs of the Astronomical Society of India | In English | → Astronomy |
| MmBAA | Memoirs of the British Astronomical Association | In English | → Astronomy |
| MmCP | Macromolecular Chemistry and Physics | In English | → Physics → Chemistry |
| MmEbr | Mémoires de l'Observatoire de l'Ebre | In French | → Astronomy |
| MmKyo | Memoirs Faculty of Sciences University of Kyoto | In English | → Mathematics and natural sciences |
| MMNA | Mathematical Modelling Numerical Analysis | In English | → Analysis |
| MMP | Materials and Manufacturing Processes | In English | → 620 |
| MmRAS | Memoirs of the Royal Astronomical Society | In English | → Astronomy |
| MMS | Mathematics and Mechanics of Solids | In English | → Mathematics → 531 |
| MmSAI | Memorie della Societa Astronomica Italiana | In Italian | → Astronomy |
| MMW | Münchener Medizinische Wochenschrift | In German | → Medicine |
| MNRAS | Monthly Notices of the Royal Astronomical Society | In English | → Astronomy |
| MNSSA | Monthly Notes of the Astronomical Society of South Africa | In English | → Astronomy |
| MO | Le Monde oriental | In French | → Language, linguistics, literature → Geography, biography, history |
| MOCI | Moniteur du Commerce International | In French | → Trade |
| MOf | Monitorul Oficial | In Romanian | → Public administration, government |
| MolPh | Molecular Physics | In English | → Nuclear, atomic, and molecular physics |
| MonAP | Communications du Département d'Astrophysique de la Faculté des Sciences de Mons | In French | → Astronomy |
| MoPhR | Molecular Physics Reports | In English | → Nuclear, atomic, and molecular physics |
| MoSim | Molecular Simulation | In English | → Nuclear, atomic, and molecular physics |
| MotZe | Motortechnische Zeitschrift | In German | → Mechanical engineering → Vehicle engineering |
| MPAG | Mathematical Physics, Analysis and Geometry | In English | → Geometry → Analysis → Physics |
| MPAJ | Muslim Public Affairs Journal | In English | → Islam → Public administration, government |
| MPAM | Mathematical Physics and Applied Mathematics | In English | → Mathematics → Physics |
| MPBu | Minor Planet Bulletin | In English | → Planets and satellites |
| MPC | Minor Planet Circulars | In English | → Planets and satellites |
| MPCPS | Mathematical Proceedings of the Cambridge Philosophical Society | In English | → Philosophy, psychology → Mathematics |
| MPDS | Mechanics and Physics of Discrete Systems | In English | → Physics |
| MPEC | Minor Planet Electronic Circulars | In English | → Planets and satellites |
| MPFD | Microdevices: Physics and Fabrication Technologies | In English | → Mechanical engineering |
| MRMPB | Magnetic Resonance Materials in Physics, Biology and Medicine | In English | → Magnetism |
| MS | Mediaeval Studies | In English | |
| MSAIQ | Societa Astronomica Italiana - Memorie Quarter | In Latin | → Astronomy |
| MSB | Methods in Subnuclear Physics | In English | → Nuclear, atomic, and molecular physics |
| MSCTN | Meteorological Satellite Center Technical Note | In English | → Meteorology, climatology |
| MSEng | Materials Science and Engineering | In English | → 620 |
| MSF | Materials Science Forum | In English | → 620 |
| MSLC | Miscellanea di Studi di Letteratura Cristiana | In Italian | → Christianity → Linguistics |
| MSM | Mechanics of Structures and Machines | In English | → Mechanical engineering |
| MSOS | Mitteilungen des Seminars für Orientalische Sprachen | In German | → Language, linguistics, literature |
| MSR | Mamluk Studies Review | In English | → Language, linguistics, literature → Geography, biography, history |
| MSS | Münchener Studien zur Sprachwissenschaft | In German | → Language, linguistics, literature |
| MSSP | Mechanical Systems and Signal Processing | In English | → Mechanical engineering → Electronics |
| MSTec | Materials Science and Technology | In English | → 620 |
| MTDM | Mechanics of Time-Dependent Materials | In English | → Mechanical engineering |
| MtSOM | Mount Stromlo Observatory Mimeographs | In English | → Astronomy |
| MtSRe | Mount Stromlo Observatory Reprints | In English | → Astronomy |
| MtWAR | Mount Wilson and Palomar Observatory Annual Report | In English | → Astronomy |
| MtWRe | Mount Wilson and Palomar Observatory Reprints | In English | → Astronomy |
| MUB | Mélanges de l'Université Saint-Joseph de Beyrouth | In French | |
| MUSJ | Mélanges (de la Faculté Orientale) de l'Université Saint-Joseph de Beyrouth | In French | → Higher education, universities |
| MVMP | Methoden und Verfahren der Mathematischen Physik | In German | → Mathematics → Physics |
| MWOAR | Mount Wilson Observatory Annual Report | In English | → Astronomy |
| MWRv | Monthly Weather Review | In English | → Meteorology, climatology |
| NaAIJ | Nanjing Aeronautical Institute Journal | In English | → Aeronautics, aircraft |
| NacEl | Nachrichten Elektronik | In German | → Electronics |
| NacZe | Nachrichtentechnische Zeitschrift | In German | → Applied sciences, technology |
| NaGe | National Geographic | In English | → Area studies → Geography |
| NapCo | Osservatorio Astronomico di Capodimonte Napoli - Contributi Astronomici | In Italian | → Astronomy |
| NAR | Nucleic Acids Research | In English | → Biochemistry, biophysics |
| NASAC | NASA Conference Publication | In English | → Astronomy → Spaceflight engineering, astronautics |
| NASAL | NASA Circular Letter | In English | → Astronomy → Spaceflight engineering, astronautics |
| NASAR | NASA Reference Publication | In English | → Astronomy → Spaceflight engineering, astronautics |
| NASAS | NASA Special Publication | In English | → Astronomy → Spaceflight engineering, astronautics |
| NatH | Natural History | In English | → Biological sciences |
| NATi | Nordisk Astronomisk Tidsskrift | In Norwegian | → Astronomy |
| NATMA | Nonlinear Analysis Theory Methods Applications | In English | → Analysis |
| NatPh | Nature Physics | In English | → Mathematics and natural sciences |
| Natur | Nature | In English | → Mathematics and natural sciences |
| NAWG | Nachrichten der Akademie der Wissenschaften in Göttingen | In German | |
| NAZ | Nachrichtenblatt der Astronomischen Zentralstelle Heidelberg | In German | → Astronomy |
| NBSSP | National Bureau of Standards Special Publication | In English | → Standardization |
| NBSTN | National Bureau of Standards Technical Note | In English | → Standardization |
| NCE | Noise Control Engineering Journal | In English | → Applied sciences, technology |
| NCimL | Lettere al Nuovo Cimento della Società Italiana di Fisica | In Italian | → Physics |
| NCLRC | National Capital Language Resource Center (www.nclrc.org) | In English | → Education → Language, linguistics, literature |
| NCNS | Network: Computation in Neural Systems | In English | → Artificial intelligence |
| NDS | Nuclear Data Sheets | In English | → Nuclei → Nuclear technology |
| NDTE | Nondestructive Testing and Evaluation | In English | → 620 |
| NeCom | Neural Computation | In English | → Computer-based techniques |
| NEJM | New England Journal of Medicine | In English | → Medicine |
| NewAR | New Astronomy Review | In English | → Astronomy |
| NFAO | Numerical Functional Analysis and Optimization | In English | → Mathematics |
| NGFAW | Nachrichtentechnische Gesellschaft Fachtagung über Antennen | In German | → Telecommunications |
| NHESS | Natural Hazards and Earth System Sciences | In English | → Natural disasters → Earth sciences |
| NIMP | Nuclear Instruments and Methods in Physics Research | In English | → Nuclei → Nuclear technology |
| NISTJ | National Institute of Standards and Technology Journal of Research | In English | → Standardization → Engineering, technology |
| NIUNA | Napoli, Istituto Universitario Navale, Annali | In Italian | → Astronomy |
| NizRe | Nizamiah Observatory Reprints | In English | → Astronomy |
| NJCh | New Journal of Chemistry | In English | → Physics |
| NJKA | Neues Jahrbuch für der klassischen Altertum | In German | |
| NJMM | Neues Jahrbuch Mineralogie Monatshefte | In German | → Mineralogy |
| NJPh | New Journal of Physics | In English | → Physics |
| NlOpt | Nonlinear Optics | In English | → Optics |
| NN | Neural Networks | In English | → Computer-based techniques → Neurology |
| NOAG | Nachrichten der Gesellschaft für Natur- und Völkerkunde Ostasiens | In German | → Ethnology → Area studies |
| NOHIC | Nizamiah JAPAL Rangapur Observatories Hyderabad India Contributions | In English | → Astronomy |
| NONESA | Nordic Newsletter for Southeast Asian Studies | In English | → Language, linguistics, literature → Geography, biography, history |
| NPG | Nature Publishing Group | In English | → Graphic industries, printing, publishing |
| NPGeo | Nonlinear Processes in Geophysics | In English | → Geophysics |
| NPhS | Nature Physical Science | In English | → Physics → Chemistry → Biological sciences |
| NPNDS | Neutron Physics and Nuclear Data in Science and Technology | In English | → Nuclear, atomic, and molecular physics |
| NPPSB | Nonequilibrium Problems in the Physical Sciences and Biology | In English | → Physics → Biological sciences |
| NPUJ | Northwestern Polytechnical University Journal | In English | → Applied sciences, technology |
| NRA&A | Nouvelle Revue d'Aéronautique et d'Astronautique | In French | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| NRAOR | National Radio Astronomy Observatory Reprints | In English | → Astronomy |
| NROA | Nouvelle Revue d'Optique Appliquée | In French | → Optics |
| NROpt | Nouvelle Revue d'Optique | In French | → Optics |
| NRRv | Naval Research Reviews | In English | → 6295 → Transport and postal services |
| NSE | Nuclear Science Engineering | In English | → Nuclei → Nuclear technology |
| NSpEc | Networks and Spatial Economics | In English | → Economics |
| NT | Novum Testamentum | In Latin | → Christianity |
| NTCo | Nondestructive Testing Communications | In English | → 620 |
| NTN | New Technology News | In English | → Engineering, technology |
| NUAAJ | Nanjing University Aeronautics and Astronautics Journal | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| NuAlg | Numerical Algorithms | In English | → Mathematics |
| NucFS | Nuclear Fusion Special Supplement | In English | → Nuclei → Nuclear technology |
| NucFu | Nuclear Fusion | In English | → Nuclei → Nuclear technology |
| NucIM | Nuclear Instruments and Methods | In English | → Nuclei → Nuclear technology |
| NucPh | Nuclear Physics | In English | → Nuclei |
| NucTe | Nuclear Technology | In English | → Nuclei → Nuclear technology |
| NucTF | Nuclear Technology Fusion | In English | → Nuclei → Nuclear technology |
| NUDTJ | National University Defense Technology Journal | In English | → Military engineering |
| NuEnD | Nuclear Engineering and Design | In English | → Nuclei → Nuclear technology |
| NUFEM | Nagoya University Faculty Engineering Memoirs | In English | → Engineering, technology |
| NuGeo | Nuclear Geophysics | In English | → Nuclei → Geophysics |
| NuMat | Numerische Mathematik | In English | → Computer-based techniques → Mathematics |
| NUSEM | Nagoya University School Engineering Memoirs | In English | → Engineering, technology |
| NVS | Nachrichtenblatt der Vereinigung der Sternfreunde | In German | → Astronomy |
| NW | Naturwissenschaften | In German | → Mathematics and natural sciences |
| NYASA | New York Academy Sciences Annals | In English | → Mathematics and natural sciences |
| NZJAS | New Zealand Journal of Asian Studies | In English | → Area studies |
| NZJGG | New Zealand Journal Geology and Geophysics | In English | → Earth sciences → Geophysics |
| NZJS | New Zealand Journal of Science | In English | → Mathematics and natural sciences |
| OAJ | Oxford Art Journal | In English | → Arts |
| OAP | Odessa Astronomical Publications | In English | → Astronomy |
| OCAM | Optimal Control Applications and Methods | In English | → Engineering, technology |
| OcDyn | Ocean Dynamics | In English | → Marine research, oceanography |
| OcEng | Ocean Engineering | In English | → Marine research, oceanography → 6295 |
| OcMod | Ocean Modelling | In English | → Marine research, oceanography |
| OcPhE | Ocean Physics and Engineering | In English | → Marine research, oceanography → 6295 |
| OcSci | Ocean Science | In English | → Marine research, oceanography |
| OEJV | Open European Journal on Variable Stars | In English | → Astronomy |
| OI | Ordinateur Individuel | In French | → Computer science |
| OJEU | Official Journal of the European Union | In English | → International relations |
| OklRe | University of Oklahoma Observatory Reprints | In English | → Astronomy |
| OLear | Open Learning | In English | → Education |
| OLEB | Origins of Life and Evolution of the Biosphere | In English | → Biological sciences |
| ONRAS | Occasional Notes of the Royal Astronomical Society | In English | → Astronomy |
| OOPS | Fundamental'nye Osnovy Opticheskoi Pamiati i Sredy | In Russian | → Mathematics and natural sciences |
| OpSCN | Optical Sciences Center Newsletter | In English | → Optics |
| OptCo | Optics Communications | In English | → Optics → Telecommunications |
| OptEn | Optical Engineering | In English | → Optics |
| OptFT | Optical Fiber Technology | In English | → Optics → Telecommunications |
| OptL | Optics Letters | In English | → Optics |
| OptLE | Optics and Lasers in Engineering | In English | → Optics → Electromagnetism |
| OptLT | Optics Laser Technology | In English | → Optics → Electromagnetism |
| OptMa | Optical Materials | In English | → Optics → 620 |
| OptN | Optics News | In English | → Optics |
| OptPE | Optical Physics and Engineering | In English | → Optics |
| OptPN | Optics & Photonics News | In English | → Optics → Electromagnetism |
| OptQE | Optical Quantum Electronics | In English | → 530145 → Optics → Engineering, technology |
| OptRv | Optical Review | In English | → Optics |
| OptSp | Optics and Spectroscopy | In English | → Optics → Electromagnetism |
| OQE | Optical and Quantum Electronics | In English | → 530145 → Optics → Engineering, technology |
| OrGeo | Organic Geochemistry | In English | → Geochemistry |
| OrLi | Origins of Life | In English | → Biological sciences |
| OrNav | Ortung und Navigation | In German | → Geodesy, cartography |
| ORROE | Occasional Reports of the Royal Observatory Edinburgh | In English | → Astronomy |
| OSAJ | Optical Society of America Journal | In English | → Optics |
| OSAJI | Optical Society of America Journal - Optics and Image Science | In English | → Optics |
| OsCar | Osteoarthritis and Cartilage | In English | → Medicine |
| OSID | Open Systems and Information Dynamics | In English | |
| OSJaJ | Oceanographical Society of Japan Journal | In English | → Marine research, oceanography |
| OVS | Observation of Variable Stars | In English | → Astronomy |
| OxfOO | Oxford University Observatory Observations | In English | → Astronomy |
| OxM | Oxidation of Metals | In English | → Chemistry → Metallurgy |
| OzSE | Ozone: Science and Engineering | In English | → Meteorology, climatology |
| P&SS | Planetary and Space Science | In English | → Astronomy |
| PA | Popular Astronomy | In English | → Astronomy |
| PA | Présence Africaine | In French | → Politics |
| PAAS | Publications of the American Astronomical Society | In English | → Astronomy |