| Acronym | Sense | Language | Topics |
|---|---|---|---|
| IHTV | Interim Hypersonic Test Vehicle | In English | → Vehicle engineering |
| IIA | Integrated Irrigation-Aquaculture | In English | → 627 → Agricultural sciences |
| IIE | Institution of Incorporated Engineers | In English | |
| IIN | Italian Institute of Navigation = IIN | Istituto Italiano di Navigazione | In Italian |
In English | → Environmental technology, water supply, waste management → Vehicle engineering → Italia |
| IIN | Istituto Italiano di Navigazione = (look above) |
In Italian | → Geodesy, cartography → Vehicle engineering → Italia |
| IINA | Atti dell'Istituto Italiano di Navigazione | In Italian | → Serial publications, periodicals → Geodesy, cartography → Vehicle engineering → Italia |
| IIOP | In-Orbit Plane | In English | → Aeronautics, aircraft → Astronautics |
| IIT | Indian Institute of Technology (www.iit.org) | In English | → Specialized or polytechnical colleges → India |
| IIT | Israel Institute of Technology | In English | |
| IJCEM | International Journal for Computational Methods in Engineering Science and Mechanics | In English | → Serial publications, periodicals → Numerical analysis |
| IJCES | International Journal of Computational Engineering Science | In English | → Serial publications, periodicals → Numerical analysis |
| IJE | International Journal of Electronics | In English | → Serial publications, periodicals → Electronics |
| IJEFM | International Journal of Engineering and Fluid Mechanics Spring | In English | → Serial publications, periodicals → Fluid mechanics |
| IJER | International Journal of Energy Research | In English | → Serial publications, periodicals → Energy economics |
| IJES | International Journal of Engineering Science | In English | → Serial publications, periodicals |
| IJFa | International Journal of Fatigue | In English | → Serial publications, periodicals → Materials science |
| IJFE | International Journal of Fusion Energy | In English | → Serial publications, periodicals → Energy economics → Nuclear technology |
| IJFr | International Journal of Fracture | In English | → Serial publications, periodicals → Materials science |
| IJHE | International Journal of Hydrogen Energy | In English | → Serial publications, periodicals → Energy economics |
| IJHM | International Journal of Hybrid Microelectronics Fall | In English | → Serial publications, periodicals → Electronics |
| IJHSE | International Journal of High Speed Electronics and Systems | In English | → Serial publications, periodicals → Electronics |
| IJICS | International Journal of Intelligent Control and Systems | In English | → Artificial intelligence → Serial publications, periodicals |
| IJLRA | Institut Jean Le Rond d'Alembert (www.dalembert.upmc.fr) | In French | → Research institutes → Mechanical engineering → 524 → Energy economics |
| IJMM | International Journal of Mini Microcomputers | In English | → Serial publications, periodicals → Computer hardware → Electronics |
| IJMS | International Journal of Mechanical Sciences | In English | → Serial publications, periodicals → Mechanics → Mechanical engineering |
| IJNME | International Journal for Numerical Methods in Engineering | In English | → Serial publications, periodicals → Numerical analysis |
| IJOE | IEEE (Institute of Electrical and Electronics Engineers) Journal of Oceanic Engineering | In English | → Serial publications, periodicals → 627 → 629123 |
| IJPES | International Journal of Physical and Engineering Sciences | In English | → Serial publications, periodicals → Physics |
| IJPR | International Journal of Production Research | In English | → Serial publications, periodicals |
| IJQE | IEEE (Institute of Electrical and Electronics Engineers) Journal of Quantum Electronics | In English | → Serial publications, periodicals → Electronics |
| IJRA | IEEE (Institute of Electrical and Electronics Engineers) Journal of Robotics Automation | In English | → Serial publications, periodicals → Electrical engineering |
| IJRQS | International Journal of Reliability, Quality and Safety Engineering | In English | → Serial publications, periodicals |
| IJRR | International Journal of Robotics Research | In English | → Serial publications, periodicals → Electrical engineering → Electronics |
| IJSC | International Journal of Satellite Communications | In English | → Serial publications, periodicals → Astronautics → Telecommunications |
| IJSE | International Journal of Solar Energy | In English | → Serial publications, periodicals → Energy economics |
| IJSSC | IEEE (Institute of Electrical and Electronics Engineers) Journal of Solid-State Circuits | In English | → Serial publications, periodicals → Electronics |
| IJTJE | International Journal of Turbo Jet Engines | In English | → Serial publications, periodicals → Vehicle engineering |
| IKMA | Industrielles Kompetenzzentrum für Mechatronik und Automation | In German | → Mechanical engineering |
| ILA | Instrument Landing Approach | In English | → Aeronautics, aircraft → Astronautics |
| ILA | Institut für Luftfahrtantriebe | In German | → Aeronautics, aircraft |
| ILAS | Instrument Landing Approach System | In English | → Aeronautics, aircraft → Astronautics |
| ILC | Initial Launch Capability | In English | → Astronautics |
| ILLW | Intermediate and Low Level Waste | In English | → Nuclear technology → Environmental technology, water supply, waste management |
| ILRS | International Laser Ranging Service (http://https://ilrs.cddis.eosdis.nasa.gov/) | In English | → Astronautics → Geodesy, cartography |
| ILRV | Integral Launch and Reentry Vehicle | In English | → Astronautics |
| ILS | Instrument Landing System | In English | → Aeronautics, aircraft → Astronautics |
| ILSSE | Integrated Life Science Shuttle Experiment | In English | → Biological sciences → Astronautics |
| ILT/RT | Imprecisely Located Target/Relocatable Target | In English | → Military engineering |
| ILTPE | Institute for Low Temperature Physics and Engineering = ФТИНТ | Физико-технический институт низких температур | In Russian = ФТІНТ | Фізико-технічний інститут низьких температур | In Ukrainian |
In English | → Physics |
| IMA | Integrated Microsystems Austria (www.ima-mst.at) | In English | → Mechanical engineering → Electronics → Austria |
| IMA | Innovation Makers Alliance | In English | → Organizations and associations → Economics |
| IMASSA | Institut de Médecine Aérospatiale - Service de Santé des Armées | In French | → Medicine → Aeronautics, aircraft → Astronautics |
| IMBA | Internationale Motorsport Bond voor Amateurs (www.imba-mx.com) | In Dutch | → Organizations and associations → Vehicle engineering → Transport and postal services |
| IMC | Instrument Meteorological Conditions | In English | → Aeronautics, aircraft → Meteorology, climatology |
| IMCO | Intergovernmental Maritime Consultative Organization | In English | → Organizations and associations → International relations → 6295 → Transport and postal services |
| IME | Institut Méditerranéen de l'Eau | In French | → Hydrology → Environmental technology, water supply, waste management |
| IMI | International Materials Institutes | In English | → Research institutes → Materials science |
| IMIT | Institute for Management of Innovation and Technology | In English | → Management |
| IMLEO | Initial Mass in Low Earth Orbit | In English | → Astronomy → Astronautics |
| IMM | Institut des Mines de Marrakech (www.inpt.ac.ma) | In French | → Specialized or polytechnical colleges → Mining → Morocco |
| IMO | International Maritime Organization = IMO | Internacia Mar-Organizo | In Esperanto = OMI | Organisation Maritime Internationale | In French |
In English | → International relations → Marine research, oceanography → 6295 → Agricultural sciences |
| IMO | Internacia Mar-Organizo = OMI (look above) |
In Esperanto | → International relations → Marine research, oceanography → 6295 → Agricultural sciences |
| IMP | Inflatable Micrometeoroid Paraglider | In English | → Astronomy → Astronautics |
| IMP/LMM | Ingénierie des Matériaux Polymères/ Laboratoire Matériaux Macromoléculaires | In French | → Research institutes → Materials science → Plastic industry |
| IMPATT | IMPact ionization Avalanche Transit-Time | In English | → Electronics |
| IMRv | International Materials Reviews | In English | → Serial publications, periodicals → Materials science |
| IMS | Interplanetary Monitor Satellite | In English | → Astronomy → Astronautics |
| IMSO | International Mobile Satellite Organization | In English | → Associations → Astronautics → Telecommunications |
| IMSS | In-Flight Medical Supply System | In English | → Medicine → Aeronautics, aircraft → Astronautics |
| IMST3 | Innovation in Mathematics, Science and Technology Teaching | In English | → Education → Mathematics and natural sciences → Mathematics |
| IMT | Institutul Naţional de Cercetare-Dezvoltare pentru Microtehnologie | In Romanian | |
| IMT | Instituto Mauá de Tecnologia (www.maua.br) | In Portuguese | → Research institutes → Brazil |
| INB | Installation Nucléaire de Base | In French | → Nuclear technology |
| INBO | International Network of Basin Organizations | In English | → 341224 → Hydrology → 626 |
| INCA | INventaire des CAnalisations | In French | → Energy economics |
| INCAS | Institutul Naţional de Cercetare-Dezvoltare Aerospaţială | In Romanian | → Astronomy → Aeronautics, aircraft → Astronautics |
| INCASOL | Institut Català del Sòl | In Spanish | → Astronomy → Energy economics |
| INCERC | Institutul Naţional de Cercetare-Dezvoltare în Construcţii şi Economia Construcţiilor | In Romanian | → Civil engineering → Construction |
| INEGA | Instituto Enerxético de Galicia | In Spanish | → Energy economics |
| INELEC | Institut National d'Électricité et d'Électronique | In French | → Specialized or polytechnical colleges → Electrical engineering → Electronics |
| INERIS | Institut National de l'Environnement Industriel et des Risques (www.ineris.fr) | In French | → Research institutes → Accidents, risks, safety → France |
| InES | Indian Academy of Sciences Proceedings: Engineering Sciences | In English | → Serial publications, periodicals → India |
| INES | International Nuclear Event Scale | In English | → Nuclear technology |
| InESS | Institut d'Électronique du Solide et des Systèmes (www-iness.c-strasbourg.fr) | In French | → Research institutes → Electronics → France |
| INESTENE | INstitut d'Évaluation des STratégies ENergétiques Européennes | In French | → Research institutes → Energy economics |
| INETI | Instituto Nacional de Engenharia e Tecnologia Industrial | In Portuguese | → Research institutes |
| InFer | Integrated Ferroelectrics | In English | → Serial publications, periodicals → Electrical engineering |
| INFM | Istituto Nazionale per la Fisica della Materia | In Italian | → Research institutes → Materials science → Italia |
| IngAr | Ingenieur Archiv | In German | → Serial publications, periodicals |
| INGM | Institut National de Génie Mécanique | In French | → Specialized or polytechnical colleges → Mechanical engineering |
| INIS | International Nuclear Information System | In English | → Nuclear technology |
| InJAE | Indian Journal of Aerospace Engineering Division | In English | → Serial publications, periodicals → Aeronautics, aircraft → Astronautics → India |
| InJME | Indian Journal of Mechanical Engineering Division | In English | → Serial publications, periodicals → Mechanical engineering → India |
| INMARSAT | International Maritime Satellite | In English | → Marine research, oceanography → Astronautics |
| INOE | Institutul Naţional de Cercetare-Dezvoltare pentru Optoelectronică | In Romanian | → Electronics |
| INP | Instituto Nacional de Pesca | In Spanish | → Vehicle engineering |
| INPE | Instituto de Pesquisas Espaciais | In Portuguese | → Astronomy → Astronautics |
| INPG | Institut National Polytechnique de Grenoble | In French | → Specialized or polytechnical colleges |
| INPT | Institut National Polytechnique de Toulouse | In French | → Specialized or polytechnical colleges |
| INRETS | Institut National de Recherche sur les Transports et leur Sécurité | In French | → Research institutes → Transport and postal services → Vehicle engineering |
| INRIA | Institut National de Recherche en Informatique et en Automatique | In French | → Research institutes → Computer science → Mechanical engineering |
| INRIA | Institut National de Recherche en Informatique et Automatique | In French | → Research institutes → Computer science → Electrical engineering |
| INS | Inertial Navigation System | In English | → Aeronautics, aircraft |
| INSAT | India Communications Satellite | In English | → Astronautics → Telecommunications → India |
| INSET | Institut National Supérieur de l'Enseignement Technique | In French | → Specialized or polytechnical colleges |
| INSIGHT | Interior exploration using Seismic Investigations, Geodesy and Heat Transport | In English | → Astronautics → Planets and satellites → Seismology, earthquakes |
| INSTM | Institut National des Sciences et des Techniques Nucléaires | In French | → Research institutes → Nuclear, atomic, and molecular physics → Nuclear technology |
| INTA | Instituto Nacional de Técnica Aeroespacial (www.inta.es) | In Spanish | → Astronomy → Aeronautics, aircraft → Astronautics → Spain |
| INTBO | International Network of Transboundary Basin Organizations | In English | → 341224 → Hydrology → 626 |
| InTEEC | Information Technology and Electrical Engineering Consultant | In English | → Consulting → Computer science → Electrical engineering |
| InTEEC | Innovación Tecnológica Electrónica Estudiantil en Ciencias | In Spanish | → Mathematics and natural sciences → Electronics |
| INTEGRAL | INTErnational Gamma-Ray Astrophysics Laboratory | In English | → Astronautics → Astronomy |
| INTELSAT | International Telecommunications Satellite | In English | → Astronautics → Telecommunications |
| INTPM | Institut National de Formation de Techniciens Supérieurs des Travaux Publics - Mostganem | In French | → Specialized or polytechnical colleges → Civil engineering |
| INTPO | Institut National de Formation de Techniciens Supérieurs des Travaux Publics - Ouargla | In French | → Specialized or polytechnical colleges → Civil engineering |
| IntSM | Interavia Space Markets | In English | → Serial publications, periodicals → Aeronautics, aircraft → Astronautics |
| IO | Input/Output | In English | → Computer science |
| IOBM | In Ocean By Mistake | In English | → Astronautics |
| IOC | In-Orbit Checkout and Calibration | In English | → Astronautics |
| IOCA | Internacia Organizo pri Civila Aviado = ICAO | International Civil Aviation Organization | In English |
In Esperanto | → International relations → Aeronautics, aircraft → Transport and postal services |
| IOD | Initial Orbit Determination | In English | → Astronautics |
| IOF | Initial Operational Flight | In English | → Aeronautics, aircraft → Astronautics |
| IOM | Interoceanmetal Joint Organization | In English | → Organizations and associations → Marine research, oceanography → Mining |
| IOM | Istituto Officina dei Materiali (https://www.iom.cnr.it/) | In Italian | → Research institutes → Materials science → Italia |
| IONDS | Integrated Operational Nuclear Detection System | In English | → Nuclear technology |
| IOS | Indian Ocean Ship | In English | → 6295 |
| IOT | Ingeniørhøjskolen Odense Teknikum | In Danish | |
| IOT | Institut für Oberflächentechnik | In German | |
| IOT | Indiana Office of Technology (www.in.gov/iot/) | In English | → United States |
| IP | Instructor Pilot | In English | → Education → Aeronautics, aircraft → Astronautics |
| IP | Instrument Payload | In English | → Astronautics |
| IPA | Fraunhofer-Institut für Produktionstechnik und Automatisierung | In German | → Research institutes |
| IPA | Independent Pilots Association | In English | → Associations → Aeronautics, aircraft |
| IPACS | Integrated Power and Attitude Control System | In English | → Astronautics |
| IPAD | Integrated Program for Aerospace Vehicle Design | In English | → Aeronautics, aircraft → Astronautics |
| IPC | Institut Polytechnique de Conakry | In French | → Specialized or polytechnical colleges |
| IPCRP | IEE Proceedings: Communications and Radar Processing | In English | → Serial publications, periodicals → Electrical engineering → Telecommunications |
| IPCRS | IEE Proceedings: Communications Radar and Signal Processing | In English | → Serial publications, periodicals → Electrical engineering → Telecommunications |
| IPE | Ingénierie du Parc en Exploitation | In French | → Energy economics |
| IPE-LAS | Institute of Physical Energetics - Latvian Academy of Sciences | In English | → Optics → Energy economics |
| IPEPA | IEE Proceedings: Electric Power Applications | In English | → Serial publications, periodicals → Electrical engineering |
| IPGTD | IEE Proceedings: Generation, Transmission, Distribution | In English | → Serial publications, periodicals |
| IPI | Istituto per la Promozione Industriale | In Italian | → Industry, industrial policy |
| IPMB | Intelligent Platform Management Bus | In English | → Electronics → Networks, communication |
| IPOpt | IEE Proceedings: Optoelectronics | In English | → Serial publications, periodicals → Optics → Electronics |
| IPP | Independent Power Producer | In English | → Energy economics |
| IPPT | Instytut Podstawowych Problemów Techniki (www.ippt.gov.pl) | In Polish | → Research institutes → Poland |
| IPS | Instrumentation Power System | In English | → Electrical engineering |
| IPS | Integrated Propulsion System | In English | → Vehicle engineering |
| IPS | Inverter Power Supply | In English | → Electrical engineering |
| IPSA | Institut Polytechnique des Sciences Avancées | In French | → Specialized or polytechnical colleges |
| IPSI | Institut pour la Promotion des Sciences de l'Ingénieur (www.ipsi-cetim.fr) | In French | → Research institutes |
| IPSN | Institut de Protection et de Sûreté Nucléaire | In French | → Nuclear technology |
| IPSSE | IEE Proceedings: Solid-State Electron Devices | In English | → Serial publications, periodicals → Electronics |
| IPTR | In-Process Technical Review | In English | |
| IPTS | Indicateur de Prix des Travaux Souterrains | In French | → Prices → Civil engineering |
| IR | Interchangeability and Replaceability | In English | |
| IR&D | Independent Research and Development | In English | → Research policy |
| IRANSAT | Iranian government communications satellite | In English | → Astronautics → Telecommunications |
| IRAS | Infrared Astronomical Satellite | In English | → Astronomy → Astronautics |
| IRBD | International River Basin District | In English | → 341224 → 626 → 627 |
| IRBM | Intermediate-Range Ballistic Missile | In English | → Military engineering |
| IRBM | Intermediate Range Ballistic Missile | In English | → Military engineering |
| IRBS | Intermediate-Range Ballistic System | In English | → Military engineering |
| IRBS | Intermediate-Range Booster System | In English | → Astronautics |
| IRC | Innovation Relay Centre | In English | |
| IRCCyN | Institut de Recherche en Communications et Cybernétique de Nantes (www.irccyn.ec-nantes.fr) | In French | → Research institutes → Telecommunications → Electronics → France |
| IRCFE | Infrared Communications Flight Experiment | In English | → Astronautics → Telecommunications |
| IRE | Institutul Naţional Român pentru Studiul Amenajării şi Folosirii Surselor de Energie | In Romanian | → Organizations and associations → Energy economics |
| IREX | Institut pour la Recherche appliquée et l'EXpérimentation en génie civil | In French | → Civil engineering |
| IRIG | Interrange Instrumentation Group | In English | |
| IrJST | Iranian Journal of Science and Technology | In English | → Serial publications, periodicals → Mathematics and natural sciences |
| IRPC | Incubateur Régional de Poitou-Charentes | In French | → Research policy → France |
| IRR | Integral Rocket Ramjet | In English | → Astronautics |
| IRSEEM | Institut de Recherche en Systèmes Électroniques Embarqués | In French | → Research institutes → Electronics |
| IRSN | Institut de Radioprotection et de Sécurité Nucléaire | In French | → Research institutes → Nuclear technology |
| IRWA | Iowa Rural Water Association (www.iarwa.org) | In English | → Associations → Environmental technology, water supply, waste management |
| IS | Installation Support | In English | |
| IS | Instrumentation System | In English | |
| IS | Integrated Satellite | In English | → Astronautics |
| ISA | International Seabed Authority (www.isa.org.jm) | In English | → Organizations and associations → International relations → Marine research, oceanography → Mining |
| ISAE | Institut Supérieur de l'Aéronautique et de l'Espace (www.isae.fr) | In French | → Specialized or polytechnical colleges → Aeronautics, aircraft → Astronautics → France |
| ISAI | Institute of Scrap Recycling Industries (www.isri.org) | In English | → Organizations and associations → Environmental technology, water supply, waste management → Electronics |
| ISAS | Institute of Space and Astronautical Science (www.isas.jaxa.jp) | In English | → Research institutes → Astronomy → Astronautics → Japan |
| ISAS | Institut für Sensor- und Aktuatorsysteme | In German | → Electronics |
| ISATS | Integration Spacecraft Automated Test System | In English | → Astronautics |
| ISBRv | International Space Business Review | In English | → Serial publications, periodicals → Astronomy → Astronautics |
| ISCCP | International Satellite Cloud Climatology Project (http://isccp.giss.nasa.gov) | In English | → Astronautics → Meteorology, climatology |
| ISDX | Interactive Surface Design eXtension | In English | → Software |
| ISE | Iniziative Sviluppo Energie | In Italian | → Energy economics → Electrical engineering |
| ISEN | Institut Supérieur d'Électronique et du Numérique | In French | → Computer-based techniques → Electronics |
| ISEO | International Sustainable Energy Organisation | In English | → Energy economics |
| ISEP | Institut Supérieur d'Électronique de Paris (www.isep.fr) | In French | → Specialized or polytechnical colleges → Electrical engineering → France |
| ISES | International Solar Energy Society | In English | → Energy economics |
| ISET | Institut für Solare Energieversorgungstechnik | In German | → Energy economics |
| ISETEC | Innovative Seehafentechnologien | In German | → 627 |
| ISF | Ingénieurs Sans Frontières | In French | → Organizations and associations |
| ISF | Industrial Space Facility | In English | → Astronomy → Astronautics |
| ISFTA | Institute for Solid Fuels Technology and Applications | In English | → Vehicle engineering |
| ISG | Intervention de Sécurité Gaz | In French | → Energy economics |