| IGOR | Institut für Gewebe- und Organrekonstruktion (www.igor.at) | In German | → Biotechnology → Medicine |
| IHP | Institute of History and Philology | In English | → Philology → History |
| IHTP | Institut d'Histoire du Temps Présent (www.ihtp.cnrs.fr) | In French | → History |
| IHV | Institute of Human Virology (www.ihv.org) | In English | → Virology |
| II | Instytut Informatyk | In Polish | → Computer science |
| IIAC | Institut Interdisciplinaire d'Anthropologie du Contemporain | In French | → Sociology |
| IIAT | Institut International d'Agriculture Tropicale = IITA | International Institute of Tropical Agriculture | In English |
In French | → Agricultural sciences |
| IIBHG | Institute of Immunobiology and Human Genetics = IIBHG | Institut za Imunobiologija i Humana Genetika | In Macedonian |
In English | → Genetics → Immunology and allergy |
| IISER | Indian Institute of Science and Education Research (www.iiserpune.ac.in) | In English | → Education |
| IITA | International Institute of Tropical Agriculture = IIAT (look above) |
In English | → Agricultural sciences |
| IJM | Institut Jacques Monod (www.ijm.jussieu.fr) | In French | → Biological sciences |
| ILAC | International Laboratory Accreditation Cooperation | In English | |
| ILCA | (Research) Institute for Languages and Cultures of Asia and Africa | In English | → Civilization, culture, progress → Language, linguistics, literature → Area studies |
| ILM | Institut für Laboratoriumsmedizin, Klinische Chemie und Molekulare Diagnostik | In German | → Biochemistry, biophysics → Pharmacology, toxicology → 6160 |
| IMCB | Institute of Molecular and Cell Biology | In English | → Biological sciences |
| IMN | Instytut Metali Nieżelaznych (www.imn.gliwice.pl) | In Polish | → Metallurgy |
| IMP/LMM | Ingénierie des Matériaux Polymères/ Laboratoire Matériaux Macromoléculaires | In French | → Materials science → Plastic industry |
| IMS | Institute for Molecular Science | In English | → Biochemistry, biophysics |
| INED | Institut National d'Études Démographiques | In French | → Demography |
| INERIS | Institut National de l'Environnement Industriel et des Risques | In French | → Nature → Engineering, technology |
| INESASS | Institute of National Economy - Shanghai Academy of Social Sciences | In English | → Economics |
| InESS | Institut d'Électronique du Solide et des Systèmes (www-iness.c-strasbourg.fr) | In French | → Electronics |
| INETI | Instituto Nacional de Engenharia e Tecnologia Industrial | In Portuguese | → Engineering, technology |
| INGV | Istituto Nazionale di Geofisica e Vulcanologia (www.ingv.it) | In Italian | → Geophysics → 55121 |
| INPMA | Institut National des Plantes Médicinales et Aromatiques | In English | → Biological sciences → Pharmacology, toxicology → Agricultural sciences |
| INRETS | Institut National de Recherche sur les Transports et leur Sécurité | In French | → Transport and postal services → Vehicle engineering |
| INRIA | Institut National de Recherche en Informatique et en Automatique | In French | → Computer science → Mechanical engineering |
| INRIA | Institut National de Recherche en Informatique et Automatique | In French | → Computer science → Electrical engineering |
| INRS | Institut National de Recherche et de Sécurité | In French | |
| INSP | Institut des Nanosciences de Paris | In French | → Physics → Chemistry |
| INSTM | Institut National des Sciences et des Techniques Nucléaires | In French | → Nuclear, atomic, and molecular physics → Nuclear technology |
| IOAOB | Instituut voor de Organisatie van de Administraties der Openbare Besturen | In Dutch | → Libraries |
| IOB | Institute of Biology | In English | → Biological sciences |
| IOPAN | Instytut Oceanologii Polskiej Akademii Nauk (www.iopan.gda.pl) | In Polish | → Marine research, oceanography |
| IPA | Fraunhofer-Institut für Produktionstechnik und Automatisierung | In German | → Engineering, technology |
| IPC | Institut de Pathologie du Cheval | In French | → Veterinary medicine → Agricultural sciences |
| IPK | Institut für Produktionsanlagen und Konstruktionstechnik (www.ipk.fraunhofer.de) | In German | → Building |
| IPN | Instytut Pamięci Narodowej - Komisja Ścigania Zbrodni przeciwko Narodowi Polskiemu (www.ipn.gov.pl) | In Polish | → Law, jurisprudence → History |
| IPN | Institut für Biophysik und Nanosystemforschung | In German | → Biochemistry, biophysics |
| IPPT | Instytut Podstawowych Problemów Techniki (www.ippt.gov.pl) | In Polish | → Engineering, technology |
| IPRC | International Pacific Research Center | In English | → International relations → Area studies |
| IRAM | Institut de Radioastronomie Millimétrique | In French | → Astronomy |
| IRAS | Istituto Spezzino Ricerche Astronomiche | In Italian | → Astronomy |
| IRCAM | Institut de Recherche et Coordination Acoustique/Musique (www.ircam.fr) | In French | → Music → Acoustical engineering |
| IRCCS | Istituto di Ricovero e Cura a Carattere Scientifico | In Italian | → Research policy |
| IRCCyN | Institut de Recherche en Communications et Cybernétique de Nantes (www.irccyn.ec-nantes.fr) | In French | → Telecommunications → Electronics |
| IRCICA | Research Centre for Islamic History, Art and Culture | In English | → Islam → Arts → History → Civilization, culture, progress |
| IREM | Institut de Recherches sur l'Enseignement des Mathématiques | In French | → Education → Mathematics |
| IRES | Institut de Recherches Économiques et Sociales | In French | → Social sciences → Economics |
| IRESCO | Institut de Recherche sur les Sociétés Contemporaines | In French | → Sociology |
| IRESCO | Institut de Recherche Européen en Sociologie et Socio-économie | In French | → Sociology → Economics |
| IRI | Institut de Recherche et d'Innovation (www.iri.centrepompidou.fr) | In French | → Research policy → Civilization, culture, progress |
| IRIS | Institut des Relations Internationales et Stratégiques (www.iris-france.org) | In English | → International relations |
| IRIS | Incorporated Research Institutions for Seismology (www.iris.edu) | In English | → Seismology, earthquakes |
| IRIT | Institut de Recherche Informatique de Toulouse (www.irit.fr) | In French | → Computer science |
| IRIT | Institut de Recherche en Informatique de Toulouse | In French | → Computer science |
| IRIZ | International Research Institute for Zen Buddhism (http://iriz.hanazono.ac.jp) | In English | → Buddhism |
| IRPI | Institut de Recherche en Propriété Intellectuelle (www.irpi.ccip.fr) | In French | → Artistic property |
| IRRI | International Rice Research Institute (www.irri.org) | In English | → Agricultural sciences |
| IRSC | Instituts de recherche en santé du Canada (www.cihr.ca) = CIHR | Canadian Institutes of Health Research | In English |
In French | → Biological sciences → Medicine |
| IRSEA | Institut de Recherche sur le Sud-Est Asiatique (www.univ-provence.fr/irsea/) | In English | → Area studies |
| IRSN | Institut de Radioprotection et de Sécurité Nucléaire | In French | → Nuclear technology |
| IRT | Institut für Rundfunktechnik (www.irt.de) | In German | → Telecommunications |
| ISC | International Seismological Centre (www.isc.ac.uk) | In English | → Seismology, earthquakes |
| ISDP | Institute for Security & Development Policy (www.isdp.eu) | In English | → Politics → Development |
| ISEGI | Instituto Superior de Estatística e Gestão de Informação | In Portuguese | → Statistics |
| ISEM | Institut des Sciences de l'Évolution de Montpellier | In French | → Biological sciences |
| ISER | Institute for Social and Economic Research | In English | → Demography, statistics, sociology → Economics |
| ISIR | Institut des Systèmes Intelligents et de Robotique | In French | → Artificial intelligence → Electrical engineering → Engineering, technology |
| ISIR | Institut für Statistik und internationale Registrierungen | In German | → Statistics |
| ISIR | Institut des Systèmes Intelligents et Robotique | In French | → Mechanical engineering → Electronics |
| ISL | Inertial Systems Laboratory | In English | → Mechanical engineering |
| ISM | Institut des Sciences Moléculaires | In French | → Biochemistry, biophysics |
| ISP | Instytut Studiów Politycznych | In Polish | → Politics |
| ISR | Instituto de Sistemas e Robótica | In Portuguese | → Electrical engineering |
| IST | Istituto Scientifico Tumori | In Italian | → Oncology |
| ISV | Institut des Sciences du Végétal | In French | → Biological sciences → Botany |
| ITI | Instituto Tecnológico de Informática (www.iti.upv.es) | In Spanish | → Computer science |
| ITQB | Instituto de Tecnologia Química e Biológica | In Portuguese | → Biological sciences → Chemical technology |
| ITU | Institut für Transurane | In German | → Nuclear, atomic, and molecular physics → Nuclear technology |
| IVK | Institut für Verbrennungskraftmaschinen und Kraftfahrzeugbau (www.ivk.tuwien.ac.at) | In German | → Mechanical engineering → Vehicle engineering |
| IVS | Institut des Vaisseaux et du Sang (www.ivs-vbi.org) = VBI | Vessels and Blood Institute | In English |
In French | → Blood and circulatory system |
| IWF | Institut für Weltraumforschung (www.iwf.oeaw.ac.at) | In German | → Astronomy → Spaceflight engineering, astronautics |
| IWI | Industriewissenschaftliches Institut | In German | → Industry, industrial policy → Engineering, technology |
| IWM | Institut für die Wissenschaften vom Menschen (www.iwm.at) | In German | → Social sciences |
| IZT | Institut für Zukunftsstudien und Technologiebewertung (www.izt.de) | In German | → Research policy → Engineering, technology |
| JAEL | JSC (Johnson Space Center) Avionics Engineering Laboratory | In English | → Aeronautics, aircraft |
| JARI | Japan Automobile Research Institute | In English | → Automobile manufacturing → Transport and postal services |
| JILA | Joint Institute for Laboratory Astrophysics (http://jilawww.colorado.edu) | In English | → Astronomy |
| JPL | Jet Propulsion Laboratory | In English | → Spaceflight engineering, astronautics |
| KAERI | Korea Atomic Energy Research Institute (www.kaeri.re.kr) | In English | → Atomic physics |
| KNMI | Koninklijk Nederlands Meteorologisch Instituut (www.knmi.nl) | In Dutch | → Meteorology, climatology |
| KRIHS | Korea Research Institute for Human Settlements (www.krihs.re.kr) | In English | → Regional planning → Geography |
| L2ES | Laboratoire de Recherche en Électronique, Électrotechnique et Systèmes | In French | → Electrical engineering → Electronics |
| LAAS | Laboratory for Analyse and Architecture of Systems | In English | → Engineering, technology |
| LAB | Laboratoire d'Accidentologie et de Biomécanique | In French | → Traumatology → Transport and postal services |
| LACE | Laboratoire d'Application de la Chimie à l'Environnement | In French | → Nature → Environment, environmental sciences → Chemistry |
| LADL | Laboratoire d'Automatisme Documentaire et Linguistique | In French | → Computer science → Libraries → Linguistics |
| LAEPSI | Laboratoire d'Analyse Environnementale des Procédés et des Systèmes Industriels | In French | → Nature → Environmental technology, water supply, waste management |
| LAFORIA | LAboratoire FORmes et Intelligence Artificielle | In French | → Artificial intelligence |
| LAI | (Österreichisches) Lateinamerika-Institut (www.lai.at) | In German | → Area studies |
| LAI | Laboratoire d'Automatique Industrielle | In French | → Mechanical engineering |
| LAMCOS | Laboratoire de Mécanique des Contacts et des Solides | In French | → 531 |
| LAMIH | Laboratoire d'Automatique et de Mécanique Industrielles et Humaines | In French | → Mechanical engineering |
| LAMOP | LAboratoire de Médiévistique Occidentale de Paris | In French | → Language, linguistics, literature → History |
| LAMSADE | Laboratoire d'Analyse et de Modélisation de Systèmes pour l'Aide à la DÉcision | In French | → Computer-based techniques → Management |
| LaMSID | Laboratoire de Mécanique des Structures Industrielles Durables | In French | → Mechanical engineering |
| LANL | Los Alamos National Laboratory | In English | |
| LANL | Los Alamos National Laboratories (www.lanl.gov) | In English | |
| LAPP | Laboratoire d’Annecy-le-Vieux de Physique des Particules | In French | → Nuclear, atomic, and molecular physics |
| LaRC | (NASA) Langley Research Center | In English | |
| LAREG | Laboratoire de Recherche en Géodésie | In French | → Geodesy, cartography |
| LARES | Laboratoire de Recherche en Sciences humaines et Sociales | In French | → Social sciences |
| LARSSYAA | Laboratory for Application of Remote Sensing Aircraft Analysis | In English | → Aeronautics, aircraft |
| LASMAP | Laboratoire de Recherche Structure et Mécanique Appliquée | In French | → Mechanical engineering |
| LASS | Laboratoire d'Analyse des Systèmes de Santé | In French | → Public health and hygiene |
| LATTS | LAboratoire Techniques, Territoires et Sociétés | In French | → Sociology → Regional planning |
| LBB | Laboratoire Biotechnologie-Bioprocédés | In French | → Biotechnology |
| LBD | Laboratoire de Bases de Données | In French | → Data |
| LCC | Laboratoire de Chimie de Coordination | In French | → Chemistry |
| LCI | Laboratory of Clinical Investigation | In English | → Medicine |
| LCIE | Laboratoire Central des Industries Électriques | In English | → Electrical engineering |
| LCPC | Laboratoire Central des Ponts et Chaussées (www.lcpc.fr) | In French | → Civil engineering |
| LCSR | Laboratoire de Combustion et Systèmes Réactifs | In French | |
| LDMS | Laboratoire de Dynamique des Machines et des Structures | In French | → Mechanical engineering |
| LEAT | Laboratoire d'Électronique, Antennes et Télécommunications | In French | → Electronics → Telecommunications |
| LEBM | Laboratoire Européen de Biologie Moléculaire | In French | → Biochemistry, biophysics |
| LECAP | Laboratoire d'Étude et de Commande Automatique de Processus | In French | → Mechanical engineering → Electronics |
| LEDSS | Laboratoire d'Études Dynamiques et Structurales de la Sélectivité | In French | → Chemistry → Biochemistry, biophysics |
| LEGI | Laboratoire d'Économie et de Gestion Industrielle | In French | → Economics → Industry, industrial policy |
| LET | Laboratoire d'Économie des Transports | In French | → Economics → Transport and postal services |
| LETI | Laboratoire d'Électronique et de Technologie de l'Informatique | In French | → Computer science → Electronics |
| LFCC | Laboratoire Franco-Chinois sur la Catalyse | In French | → Chemistry → Chemical technology |
| LGE | Laboratoire de Géochimie des Eaux | In French | → Geochemistry → Hydrology |
| LGE | Laboratoire de Génie Électrique | In French | → Electrical engineering |
| LGGE | Laboratoire de Glaciologie et Géophysique de l'Environnement | In French | → Earth sciences |
| LGIT | Laboratoire de Géophysique Interne et de Tectonophysique | In French | → Geophysics → Seismology, earthquakes |
| LI3 | Laboratoire de recherche en Ingénierie Informatique Intelligente | In French | → Software → Artificial intelligence |
| LIA | Laboratoire d'Informatique d'Avignon (www.lia.univ-avignon.fr) | In French | → Computer science |
| LIER | Laboratoire d'essais INRETS Équipements Routiers | In French | → Civil engineering → Transport and postal services |
| LIG | Laboratoire d'Informatique de Grenoble | In French | → Computer science |
| LIM | Laboratoire d'Ingénierie Mathématique | In French | → Mathematics |
| LIMHP | Laboratoire d'Ingénierie des Matériaux et des Hautes Pressions | In French | → Engineering, technology |
| LIMSI | Laboratoire d'Informatique pour la Mécanique et les Sciences de l'Ingénieur | In French | → Computer science → Mechanical engineering |
| LIOS | Linzer Institut für Organische Solarzellen = LIOS | Linz Institute for Organic Solarcells | In English |
In German | → Energy economics |
| LIOS | Linz Institute for Organic Solarcells = (look above) |
In English | → Energy economics |
| LIP6 | Laboratoire d'Informatique de Paris 6 | In French | → Computer science |
| LIPCNE | Laboratorio de Interacción Persona-Computador para Necesidades Especiales | In Spanish | → Human-computer interaction |
| LIRIS | Laboratoire d'InfoRmatique en Images et Systèmes d'information | In French | → Computer science → Graphical processing → 00 |
| LIRMM | Laboratoire d’Informatique, de Robotique et de Micro-électronique de Montpellier | In French | → Computer science → Electronics |
| LISE | Laboratoire Interdisciplinaire pour la Sociologie Économique | In French | → Sociology → Economics |
| LISMMA | Laboratoire d'Ingénierie des Systèmes Mécaniques et MAtériaux | In French | → Mechanical engineering |
| LIST | Laboratoire d'Intégration des Systèmes et des Technologies | In French | → Engineering, technology |
| LLI | Laboratoire de Linguistique Informatique | In French | → Computer-based techniques → Linguistics |
| LLNL | Lawrence Livermore National Laboratory | In English | |
| LLNL | Lawrence Livermore National Laboratories | In English | |
| LMC3O | Laboratoire de Matériaux Catalytiques et Catalyse en Chimie Organique | In English | → Chemistry |
| LMD | Laboratoire de Météorologie Dynamique | In French | → Meteorology, climatology |
| LMFA | Laboratoire de Mécanique des Fluides et d’Acoustique | In French | → 5325 → Aerodynamics → Physics |
| LMI | Laboratory of Molecular Imaging | In English | → Biochemistry, biophysics |
| LMM | Laboratory of Metabolic Medicine | In English | → Physiology |
| LMO | Laboratorium voor Modelonderzoek | In Dutch | |
| LNE | Laboratoire National d'Essais | In French | |
| LNEC | Laboratório Nacional de Engenharia Civil | In Portuguese | → Building → Civil engineering |
| LNNL | Lawrence Livermore National Laboratory | In English | |
| LOCI | Laboratory for Optical and Computational Instrumentation | In English | → Optics → Computer science |
| LPCI | Laboratoire de Physico-Chimie Industrielle | In French | → Chemical technology |
| LPEQ | Laboratoire de Psychologie Expérimentale et Quantitative (www.unice.fr/lpeq/) | In French | → Psychology |
| LPES | Laboratoire de Physique Électronique des Solides | In French | → 53912 |
| LPL | Laboratoire de Physique des Lasers | In French | → Magnetism |
| LPM | Laboratoire de Physique de la Matière | In French | → 539 |
| LPMC | Laboratoire de Physique de la Matière Condensée (http://pmc.polytechnique.fr) | In French | → Physics of condensed matter |
| LPMTM | Laboratoire des Propriétés Mécaniques et Thermodynamiques des Matériaux | In French | → 531 → Thermodynamics |
| LPPA | Laboratoire de la Physiologie, de la Perception et de l'Action | In French | → Physiology |
| LPPE | Laboratoire de Physiologie et de Psychologie Expérimentales | In French | → Psychology → Physiology |
| LPS | Laboratoire de Police Scientifique | In French | → Police |
| LREC | Laboratorio Regional de Engenharia Civil | In Portuguese | → Civil engineering → Building |
| LRI | Laboratoire de Recherche en Informatique | In French | → Computer science |
| LRPAT | Laboratoire de Recherche en Pathologies Radio-induites | In French | → Pathology |
| LSGC | Laboratoire des Sciences du Génie Chimique | In French | → Chemistry → Chemical technology |
| LSSL | Life Sciences Space Laboratory | In English | → Biological sciences → Spaceflight engineering, astronautics |
| LTSI | Laboratoire Traitement du Signal et Instrumentation | In French | → Telecommunications |
| LTT | Laboratory of Thermal Turbomachines | In English | → Mechanical engineering |
| LURE | Laboratoire d'Utilisation du Rayonnement Électromagnétique | In French | → Electricity, magnetism, electromagnetism |
| LUSSI | Laboratoire UltraSons, Signaux et Instrumentation (www.lussi.univ-tours.fr) | In French | → Diagnostics |
| LVA | Laboratoire Vibrations-Acoustique | In French | → Acoustics |
| Mockup And Integration Laboratory | In English | → Mechanical engineering | |
| MCL | Materials Center Leoben (www.mcl.at) | In English | → Materials science |
| MEDRC | Middle East Desalination Research Center (www.medrc.org) | In English | → Environmental technology, water supply, waste management → Chemical technology |
| MERL | Materials Engineering Research Laboratory | In English | → Materials science |
| MIB | Materials and systems Institute of Bordeaux | In English | → Materials science |
| MIT/LL | Massachusetts Institute of Technology - Lincoln Laboratory | In English | → Specialized or (poly)technical colleges |
| MITIL | MIT (Massachusetts Institute of Technology) Instrumentation Laboratory | In English | → Specialized or (poly)technical colleges → Engineering, technology |
| MOL | Manned Orbital Laboratory | In English | → Spaceflight engineering, astronautics |
| MORL | Manned Orbiting Research Laboratory | In English | → Spaceflight engineering, astronautics |
| MPS | Max-Planck-Institut für Sonnensystemforschung (www.mps.mpg.de) | In German | → Solar system |
| MSCL | Measurement Standards and Calibration Laboratory | In English | → Standardization |
| MSL | Materials Science Laboratory | In English | → Materials science |
| MSL | Mechanical Systems Laboratory | In English | → Mechanical engineering |
| MVO | Montserrat Volcano Observatory (www.mvo.ms) | In English | → 55121 |
|