| HDTV | High-Definition Television | In English | → Telecommunications |
| HDTV | High Definition Television | In English | → Telecommunications |
| HEACE | Health Effect of Aircraft Cabin Environment | In English | → Medicine → Aeronautics, aircraft → Transport and postal services |
| HeaPh | Health Physics | In English | → Serial publications, periodicals → Medicine |
| HECF | (École des) Hautes Études Comptables et Financières | In French | → Specialized or (poly)technical colleges → Finance → Accounting |
| HEDI | High Endoatmospheric Defense Interceptor | In English | → Military engineering |
| HEDSIM | High Endoatmospheric Defense System Simulator | In English | → Computer simulation → Military engineering |
| HEGEL | Histoire, Enjeux Globaux, Écomobilité Locale | In French | → Transport and postal services |
| HEI | Hautes Études Industrielles | In French | → Specialized or (poly)technical colleges → Engineering, technology |
| HELLP | Hemolysis, Elevated Liver enzymes and Low Platelet count | In English | → Physiology → Pathology |
| HEMT | High Electron Mobility Transistor | In English | → Electronics |
| HEO | High Earth Orbit | In English | → Astronomy → Spaceflight engineering, astronautics |
| HEO | High-Energy Orbit | In English | → Astronomy → Spaceflight engineering, astronautics |
| HEOO | Honeywell Electro-Optical Operations | In English | → Electrical engineering |
| HEOR | Historical Event Operation Record | In English | → Engineering, technology |
| HESC | Hemispheric Energy Steering Committee = CDEH | Comité Directivo para la Energía del Hemisferio | In Spanish = CDEH | Comité Directeur pour l'Énergie dans l'Hémisphère | In French = CDEH | Comitê Diretor para a Energia do Hemisfério | In Portuguese |
In English | → International economic cooperation → Energy economics |
| HEW | Hamburgische Elektrizitätswerkstatt | In German | → Electrical engineering |
| HF | Horizontal Flight | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HF | Hydrogen Fluoride | In English | → Chemistry → Chemicals |
| HF | Hair Follicle | In English | → Anatomy |
| HF/DF | Hydrogen Fluoride/Deuterium Fluoride | In English | → Chemistry → Chemical technology |
| HFA | Hoogfunctionerend Autisme | In Dutch | → Neurology |
| HFA | Holzforschung Austria (www.holzforschung.at) | In German | → Research institutes → Forestry |
| HFC | Hydraulic Flight Control | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFCL | Hydraulic Flight Control Laboratory | In English | → Research institutes → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFCT | Hydraulic Flight Control Test | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFCV | Helium Flow Control Valve | In English | → Mechanical engineering |
| HFE | Human Factors Engineering | In English | → Engineering, technology |
| HFEA | Human Fertilisation and Embryology Authority | In English | → Gynaecology → Reproductive biology |
| HFMP | Human Factors Management Plan | In English | → Engineering, technology → Management |
| HFRA | High-Frequency Recovery Antenna | In English | → Telecommunications |
| HFS | Horizontal Flight Simulator | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFT | Horizontal Flight Test | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFTE | Human Factors Test and Engineering | In English | → Engineering, technology |
| HFTF | Horizontal Flight Test Facility | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFTS | Horizontal Flight Test Simulator | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HFX | High-Frequency Transceiver | In English | → Telecommunications |
| HG | High Gain | In English | → Telecommunications |
| HGA | High-Gain Antenna | In English | → Telecommunications |
| HGAS | High-Gain Antenna System | In English | → Telecommunications |
| HGc-Dt-E | Mercury-Cadmium-Telluride | In English | → Chemistry → Chemical technology |
| HHI | Heinrich-Hertz-Institut (www.hhi.fraunhofer.de) | In German | → Research institutes → Telecommunications |
| HHMI | Howard Hughes Medical Institute | In English | → Medicine |
| HHV | Human Herpesvirus | In English | → Virology → Infectious diseases |
| HHV | Help Hospitalized Veterans (www.hhv.org) | In English | → Organizations and associations → Medicine |
| HIAD | Handbook of Information for Aircraft Designers | In English | → Aeronautics, aircraft |
| HIAD | High-Altitude Defense Program | In English | → 355 → Military engineering → Aeronautics, aircraft |
| HICAMP | Highly Calibrated Airborne Measurements Program | In English | → Aeronautics, aircraft |
| HIES | Hartutako Immuno Eskasiaren Sindromea = AIDS | Acquired Immune Deficiency Syndrome | In English = SIDA | Syndrome d'Immuno-Déficience Acquise | In French = VIGS | Verworwe Immuniteitsgebreksindroom | In Afrikaans = SIDA | Síndrome de Inmuno-Deficiencia Adquirida | In Occitan = SIDA | Sindromo di Imuno-Defekteso Aquirita | In Ido = AIDS | Akirita Imuno-Deficita Simptomaro | In Esperanto = SIDA | Sindrome d'inmunodefizienzia aquirita | In Aragonese = СПИН | Синдром на придобитата имунна недостатъчност | In Bulgarian = QİÇS | Qazanılmış İmmun Çatışmazlığı Sindromu | In Azerbaijani = SIDA | Síndrome d'Immunodeficiència Adquirida | In Catalan = SIDA | Síndrome de Inmunodeficiencia Adquirida | In Spanish = SEIF | Siondróm Easpa Imdhíonachta Faighte | In Irish = AIDS | Annlochd Inneamh Dìon-Slàinte | GD = ՁԻԱՀ | Ձեռքբերովի Իմունային Անբավարվածության Համախտանիշ | In Armenian = SCDI | Syndromis Comparatis Defectu Immunitatis | In Latin = 에이즈 | 후천성 면역 결핍 증후군 | In Korean = შიდსი | შეძენილი იმუნური დეფიციტის სინდრომი | In Georgian = СИДА | Синдромот на стекнат имунолошки дефицит | In Macedonian = СИДА | синдром стеченог имунолошког дефицита | In Serbian = AIDS | Akvirírani imúnski deficítni sindróm | In Slovenian = СПИД | Синдром приобретённого иммунного дефицита | In Russian = SIDA | Sindromul Imunodeficienţei Autodobândite | In Romanian = UHCW | Unquy hark'aypa chaskisqa waqlliynin | In Quechua = SIDA | Síndrome da imunodeficiência adquirida | In Portuguese = AIDS | Hội chứng Suy giảm Miễn dịch Mắc phải | In Vietnamese = СНІД | Cиндром набутого імунодефіциту | In Ukrainian = AIDS | Alınğan İmmun Defisit Síndromı | In Tatar = UKIMWI | Upungufu wa Kinga Mwilini | In Swahili |
In Basque | → Immunology and allergy → Infectious diseases |
| HIGED | Handbook of Instructions for Ground Equipment Designers | In English | |
| HIMAT | History of Mining Activities in the Tyrol | In English | → Mining → History |
| HiMAT | Highly Maneuverable Aircraft Technology | In English | → Aeronautics, aircraft |
| HINARI | Health InterNetwork Access to Research Initiative | In English | → Medicine |
| HIP | Hot Isostatic Press | In English | |
| HiTec | High Technology | In English | → Serial publications, periodicals → Engineering, technology |
| HIV | Human Immunodeficiency Virus = VIH | Virus de l'Immunodéficience Humaine | In French = VIH | Virus d'Inmunodeficencia Humana | In Asturian = VIH | Vírus da imunodeficiência humana | In Portuguese = VIDH | Virus Immunitarii Defectus Humanae | In Latin = ŽIV | Žmogaus Imunodeficito Virusas | In Lithuanian = ХИВ | Хумане имунодефицијенције | In Serbian = MIV | Menslike Immuniteitsgebreksvirus | In Afrikaans = HIV | Humani Imunodeficientni Virus | In Slovenian = ВИЧ | Вирус иммунодефицита человека | In Russian = GIB | Giza Immunoeskasiaren Birusa | In Basque |
In English | → Virology → Immunology and allergy → Infectious diseases |
| HIV | Humani Imunodeficientni Virus = VIH, VIDH, ŽIV, ХИВ, MIV, ВИЧ, GIB (look above) |
In Slovenian | → Virology → Immunology and allergy → Infectious diseases |
| HK | Housekeeping | In English | → 64 |
| HKI | Hans Knöll Institut (www.hki-jena.de) | In German | → Research institutes → Pathology → Pharmacology, toxicology → Infectious diseases |
| HKV | Hit-To-Kill Vehicle | In English | → Vehicle engineering |
| HLLV | Heavy-Lift Launch Vehicle | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HLLW | High Level Liquid Waste | In English | → Environmental technology, water supply, waste management |
| HLR | Home Location Register | In English | → Telecommunications |
| HLV | Hybrid Launch Vehicule | In English | → Vehicle engineering |
| HMA | Hypergolic Maintenance Area | In English | → Maintenance and logistics → Vehicle engineering |
| HMC | Hybrid Microcircuit | In English | → Electronics |
| HMCF | Hypergolic Maintenance and Checkout Facility | In English | → Maintenance and logistics → Vehicle engineering |
| HMF | Health Maintenance Facility | In English | → Medicine |
| HMF | Hypergolic Maintenance Facility | In English | → Maintenance and logistics → Vehicle engineering |
| HMO | Health Maintenance Organization | In English | → Organizations and associations → Medicine |
| HMP | Hydrazine Monopropellant | In English | → Spaceflight engineering, astronautics |
| HMPPA | Herbal Medicinal Products Platform Austria | In English | → Pharmacology, toxicology |
| HMS | Health Monitoring System | In English | → Medicine |
| HN | Hospital Neurológico | In Spanish | → Neurology |
| HNO | Hals-, Nasen-, und Ohrenheilkunde | In German | → Pathology |
| HOFCO | Horizontal Functional Checkout | In English | → Engineering, technology |
| HON | Health On the Net | In English | → Networks, communication → Medicine |
| HOPE | HIV Outreach Programm and Education | In English | → Pathology |
| HOSC | HUntsville Operations SUpport Center | In English | |
| HOST | Hardened Optical Sensor Test Bed | In English | |
| HOTOL | Horizontal Takeoff and Landing | In English | → Spaceflight engineering, astronautics |
| HP | Handling Procedure | In English | → Engineering, technology |
| HP | Horsepower | In English | → Electrical engineering |
| HP | Perigee Altitude | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HPA | High-Power Amplifier | In English | → Electrical engineering |
| HPA | High-Power Antenna | In English | → Telecommunications |
| HPF | Holographic Photopolymer Film | In English | |
| HPFT | High-Pressure Fuel Turbopump | In English | → Vehicle engineering |
| HPLS | History and Philosophy of the Life Sciences | In English | → Philosophy, psychology → Biological sciences → Medicine → History |
| HPM | High-Performance Motor | In English | → Mechanical engineering → Vehicle engineering |
| HPP | High Performance Polymers | In English | → Serial publications, periodicals → 620 → 620039 |
| HPPF | Horizontal Payloads Processing Facility | In English | → Spaceflight engineering, astronautics |
| HPPS | Human Plasma Product Services | In English | → Blood and circulatory system → Pharmacology, toxicology |
| HPR | Hydrogen Pressure Regulator | In English | → Electrical engineering |
| HPRV | Hydrogen Pressure Relief Valve | In English | → Electrical engineering |
| HPS | Hemophagocytic syndrome | In English | → Blood and circulatory system → Pathology |
| HPT | Home Pregnancy Test | In English | → Obstetrics → Reproductive biology |
| HQE | Haute Qualité Environnementale | In French | → Quality management → Nature and society → Environmental technology, water supply, waste management |
| HRDM | High-Rate Demultiplexer | In English | → Electronics |
| HRH | Holdfast Rubber Highway | In English | → Civil engineering and land transport → Plastic industry |
| HRI | Honda Research Institute | In English | → Vehicle engineering |
| HRSC | High Resolution Stereo Camera | In English | → Astronomy → Spaceflight engineering, astronautics |
| HRT | Hrvatska Radiotelevizija (www.hrt.hr) | In Croatian | → Telecommunications |
| HS | Hydrogen Sulfide | In English | → Chemistry → Chemical technology |
| HSA | Health Science Authority | In English | → Medicine → Biological sciences |
| HSC | Hierarchical Storage Controller | In English | → Engineering, technology |
| HSC | House Spacecraft | In English | → Spaceflight engineering, astronautics |
| HSCS | High-Speed Communications Subsystem | In English | → Telecommunications |
| HSCSD | High Speed Circuit Switched Data | In English | → Telecommunications |
| HSCU | Hydraulic Supply and Checkout Unit | In English | → Mechanical engineering |
| HSDD | Hypoactive Sexual Desire Disorder | In English | → Medicine |
| HSDPA | High Speed Downlink Packet Access | In English | → Telecommunications |
| HSE | Heat Shield Entry | In English | → Spaceflight engineering, astronautics |
| HSF | Hypergolic Servicing Facility | In English | → Vehicle engineering |
| HSFP | Human Science Frontiers Programme | In English | → Medicine |
| HSG | Hysterosalpingogram | In English | → Gynaecology → Reproductive biology |
| HSMWG | Hungarian Sexual Medicine Working Group | In English | → Organizations and associations → Sexual problems → Urology |
| HSO | Handikappförbundens samarbetsorgan (www.hso.se) | In Swedish | → Medicine |
| HSRV | Heat-Source Reentry Vehicle | In English | → Spaceflight engineering, astronautics |
| HSS | High Stress/Strain | In English | → Mechanical engineering |
| HSS | High Speed Steel | In English | → Metallurgy |
| HSSM | Hardened Space Sensor Model | In English | → Spaceflight engineering, astronautics |
| HST | Hubble Space Telescope | In English | → Astronomy → Spaceflight engineering, astronautics |
| HST | High Speed Train | In English | → Rail transport engineering |
| HSTF | Hypergolic System Test Facility | In English | → Vehicle engineering |
| HSV | Hypersonic Vehicle | In English | → Vehicle engineering |
| HT | High Technology | In English | → Engineering, technology |
| HTA | Hypertension artérielle = АГ | Артериальная гипертензия | In Russian |
In French | → Physiology → Pathology |
| HTC | High-Temperature Carbon | In English | → Chemical technology |
| hTEP | Human Tissue Engineered Product | In English | → Biotechnology |
| HTGR | High Temperature Gas Cooled Reactor | In English | → Nuclear technology |
| HTH | Heavy Transport Helicopter | In English | → Aeronautics, aircraft |
| HTH | High-Test Hypochlorite | In English | → Chemicals |
| HTN | High Blood Pressure | In English | → Physiology → Pathology |
| HTO | Horizontal Takeoff | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HTP | Hydroxyl Terminated Propellant | In English | → Spaceflight engineering, astronautics → Chemical technology |
| HTP | Horizontal Tail Plane | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| HTPB | Hydroxyl Terminator Polybutadiene | In English | → Physics → Chemical technology |
| HTPB | Hydroxyl Terminated Polybutylene | In English | → Physics → Chemical technology |
| HTR | High Temperature Reactor | In English | → Nuclear technology |
| HTrEn | Heat Transfer Engineering | In English | → Serial publications, periodicals → Thermodynamics → Engineering, technology |
| HTS | Humantechnology Styria (www.humantechnology.at) | In English | → Biotechnology → Medicine |
| HUFEB | Hokkaido University Faculty Engineering Bulletin | In English | → Serial publications, periodicals → Engineering, technology |
| HUFEM | Hokkaido University Faculty Engineering Memoirs | In English | → Serial publications, periodicals → Engineering, technology |
| HUS | Hämolytisch-urämisches Syndrom = HUS | Hemolytic Uremic Syndrome | In English = SUH | Síndrome Urémico Hemolítico | In Spanish = SHU | Syndrome Hémolytique et Urémique | In French = HUS | Hemolytisk uremisk syndrom | In Nynorsk = HUS | Hemolytisk-uremisk syndrom | In Norwegian = ХУС | Хемолитички уремијски синдром | In Serbian = HÜS | Hemolitik üremik sendrom | In Turkish |
In German | → Blood and circulatory system → Pathology |
| HÜS | Hemolitik üremik sendrom = HUS, SUH, SHU, ХУС (look above) |
In Turkish | → Blood and circulatory system → Pathology |
| HUS | Hemolytisk uremisk syndrom = SUH, SHU, ХУС, HÜS (look above) |
In Nynorsk | → Blood and circulatory system → Pathology |
| HUS | Hemolytisk-uremisk syndrom = SUH, SHU, ХУС, HÜS (look above) |
In Norwegian | → Blood and circulatory system → Pathology |
| HUS | Hemolytic Uremic Syndrome = SUH, SHU, ХУС, HÜS (look above) |
In English | → Blood and circulatory system → Pathology |
| HUVEC | Human Umbilical Vascular Endothelial Cell | In English | → Biological sciences → Medicine |
| HVE | High-Voltage Electronics | In English | → Electronics |
| HVM | Hydraulic Valve Module | In English | → Mechanical engineering |
| HVM | Hypervelocity Missile | In English | → Military engineering |
| HVPS | High-Voltage Power Supply | In English | → Electrical engineering |
| HVSF | Honeywell Verification Simulation Facility | In English | → Engineering, technology |
| HX | Heat Exchanger | In English | → Electrical engineering |
| HYBVENT | Hybride ventilatie in kantoor- en schoolgebouwen | In Dutch | → Building |
| HYPACE | Hybrid Programmable Attitude Control Electronics | In English | → Electronics → Spaceflight engineering, astronautics |
| HYSAT | Hybrid Satellite | In English | → Spaceflight engineering, astronautics |
| HYSAT | Hybrid Sensor Experimental Satellite | In English | → Spaceflight engineering, astronautics |
| I+D | Investigación y Desarrollo = R&D | Recherche et développement | In French = F&E | Forschung und Entwicklung | In German = R&D | Research and Development | In English = R&S | Ricerca e Sviluppo | In Italian = P&D | Pesquisa e Desenvolvimento | In Portuguese = O&O | Onderzoek en Ontwikkeling | In Dutch = FoU | Forsøk og Utvikling | In Norwegian |
In Spanish | → Research policy → Engineering, technology |
| I-STEM | Institut des Cellules Souches pour le Traitement et l'Étude des Maladies Monogéniques | In French | → Biotechnology → Medicine |
| I-SWARM | Intelligent Small World Autonomous Robots for Micromanipulation | In English | → Mechanical engineering |
| I3S | (Laboratoire d')Informatique, Signaux et Systèmes de Sophia Antipolis | In French | → Research institutes → Computer science → Telecommunications |
| IA&A | Ingenieria aeronáutica y astronáutica | In Spanish | → Serial publications, periodicals → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| IAA | Industries Agricoles et Alimentaires | In French | → Agricultural sciences → Beverage industry → Food technology |
| IAA | International Aerospace Abstracts | In English | → Serial publications, periodicals → Astronomy → Aeronautics, aircraft → 6297 |
| IAAE | Internacia Agentejo pri Atom-Energio (www.iaea.org) = IAEA | International Atomic Energy Agency | In English = AIEA | Agence Internationale de l'Énergie Atomique | In French = AIEA | Agenţia Internaţională pentru Energie Atomică | In Romanian = МААЕ | Международна агенция за атомна енергия | In Bulgarian = AIEA | Agència Internacional de l'Energia Atòmica | In Catalan = MAAE | Mezinárodní agentura pro atomovou energii | In Czech = IAEA | Det Internationale Atomenergiagentur | In Danish = IAEO | Internationale Atomenergieorganisation | In German = OIEA | Organismo Internacional de Energía Atómica | In Spanish = סבא"א | הסוכנות הבינלאומית לאנרגיה אטומית | In Hebrew = IAEA | International Atomenergie Agence | In Letzeburgesh = AIEA | Agenzia Internazionale per l'Energia Atomica | In Italian = IAEA | अंतर्राष्ट्रीय परमाणु ऊर्जा अधिकरण | In Hindi = MAAE | Меѓународна агенција за атомска енергија | In Macedonian = МАГАТЭ | Международное агентство по атомной энергии | In Russian = AIEA | Agência Internacional de Energia Atómica | In Portuguese = MAEA | Międzynarodowa Agencja Energii Atomowej | In Polish = МАГАТЕ | Міжнародне агентство з атомної енергії | In Ukrainian = UAEA | Uluslararası Atom Enerji Ajansı | In Turkish = IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ | In Thai = EANA | Energia Atomikoaren Nazioarteko Agentzia | In Basque |
In Esperanto | → International relations → Energy economics → Nuclear technology |
| IAB | Interactive Advertising Bureau | In English | → 659 |
| IAC | Institut Agronomique néo-Calédonien | In French | → Agricultural sciences |
| IACO | Installation, Assembly, and Checkout | In English | → Engineering, technology |
| IACO | International Aviation COnsulting | In French | → 359 → Aeronautics, aircraft |
| IACR | International Association for Cryptologic Research (www.iacr.org) | In English | → Associations → Mathematics → Telecommunications |
| IACS | Inertial Attitude Control System | In English | → Spaceflight engineering, astronautics |
| IADE | Infirmièr(e)-Anesthésiste Diplômé(e) d'État | In French | → Anesthesiology |
| IadEn | Iadernaia Energiia = IadEN | ядерная энергия | In Russian |
In Russian | → Serial publications, periodicals → Nuclear, atomic, and molecular physics → Nuclear technology |
| IadEN | ядерная энергия = IadEn (look above) |
In Russian | → Serial publications, periodicals → Nuclear, atomic, and molecular physics → Nuclear technology |
| IAEA | International Atomic Energy Agency (www.iaea.org) = IAAE, AIEA, МААЕ, MAAE, IAEO, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In English | → International relations → Energy economics → Nuclear technology |
| IAEA | Internacia Agrikultura Esperanto-Asocio | In Esperanto | → Associations → Agricultural sciences |
| IAEA | Det Internationale Atomenergiagentur (www.iaea.org) = IAAE, AIEA, МААЕ, MAAE, IAEO, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In Danish | → International relations → Energy economics → Nuclear technology |
| IAEA | अंतर्राष्ट्रीय परमाणु ऊर्जा अधिकरण (www.iaea.org) = IAAE, AIEA, МААЕ, MAAE, IAEO, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In Hindi | → International relations → Energy economics → Nuclear technology |
| IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ (www.iaea.org) = IAAE, AIEA, МААЕ, MAAE, IAEO, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In Thai | → International relations → Energy economics → Nuclear technology |
| IAEA | International Atomenergie Agence (www.iaea.org) = IAAE, AIEA, МААЕ, MAAE, IAEO, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In Letzeburgesh | → International relations → Energy economics → Nuclear technology |
| IAEO | Internationale Atomenergieorganisation (www.iaea.org) = IAAE, IAEA, AIEA, МААЕ, MAAE, OIEA, סבא"א, МАГАТЭ, MAEA, МАГАТЕ, UAEA, EANA (look above) |
In German | → International relations → Energy economics → Nuclear technology |
| IAESM | IEEE (Institute of Electrical and Electronics Engineers) Aerospace Electronic Systems Magazine | In English | → Serial publications, periodicals → Electronics → Spaceflight engineering, astronautics |
| IAESTE | International Association for the Exchange of Students for Technical Experience (www.iaeste.org) | In English | → Associations → Higher education, universities |
| IAF | International Astronautical Federation | In English | → Organizations and associations → Spaceflight engineering, astronautics |
| IAF | Internet Access Facilities | In English | → Internet → Telecommunications |
| IAHR | International Association of Hydraulic Engineering and Research | In English | → Associations → Environmental technology, water supply, waste management |
| IAHS | International Association of Hydraulical Sciences | In English | → Associations → Environmental technology, water supply, waste management |
| IAIK | Institut für Angewandte Informationsverarbeitung und Kommunikationstechnologie (www.iaik.tugraz.at) | In German | → Computer science → Telecommunications |
| IAIN | International Association of the Navigation Institutes | In English | → Associations → Geodesy, cartography → Vehicle engineering |
| IALANA | International Association of Lawyers Against Nuclear Arms | In English | → Associations → Law, jurisprudence → Nuclear technology |
| IAM | International Association of Machinists | In English | → Associations → Mechanical engineering |
| IANIS | Innovative Actions Network for the Information Society | In English | → Computer science → Telecommunications |
| IANT | International Advances in Nondestructive Testing | In English | → Serial publications, periodicals → Engineering, technology |
| IAO | Ingénierie Assistée par Ordinateur | In French | → Computer-based techniques → Engineering, technology |
| IAP | Institut Algérien du Pétrole | In French | → Specialized or (poly)technical colleges → Mining → 665 |
| IAPM | IEEE (Institute of Electrical and Electronics Engineers) Antennas Propagation Magazine | In English | → Serial publications, periodicals → Telecommunications |
| IAPO | International Alliance of Patients' Organizations (www.patientsorganizations.org) | In English | → Organizations and associations → Medicine |