| Acronym | Sense | Language | Topics |
|---|---|---|---|
| TTC | Telemetry, Telecommand and Control | In English | → Astronautics |
| TTC | Toutes Taxes Comprises | In French | → Taxes, duties → Accounting |
| TTCA | Thrust Translation Controller Assembly | In English | → Vehicle engineering |
| TTCV | Tracking, Telemetry, Command, and Voice | In English | → Astronautics → Telecommunications |
| TTD | Temps de Thromboplastine Dilué | In French | → Blood and circulatory system |
| TTE | Transthoracic Echocardiography | In English | → Diagnostics → Cardiology |
| TTENP | Transport Électricité Normandie Paris | In French | → Electrical engineering → France |
| TTL | Transistor-Transistor Logic | In English | → Electronics |
| TTL | Technology Transfer and Licensing | In English | → Industrial property → Engineering, technology |
| TTO | Technology Transfer Office | In English | → Engineering, technology |
| TTP | Time Triggered Protocol | In English | → Engineering, technology |
| TTP | Transports Terrestres Promotion | In French | → Transport and postal services |
| TTP | Thrombotic Thrombocytopenic Purpura | In English | → Blood and circulatory system → Pathology |
| TTP | Time To Perigee | In English | → Astronomy → Astronautics |
| TTPA | Temps de Thromboplastine Partielle Activée | In French | → Blood and circulatory system |
| TTRT | Türkiye Radyo-Televizyon Kurumu (www.trt.net.tr) | In Turkish | → Telecommunications → Turkey |
| TTX | TinyOS Technology Exchange | In English | → Congresses → Operating systems → Electronics |
| TTY | Teletype | In English | → Telecommunications |
| TU | Technical Utilization | In English | → Engineering, technology |
| TU | Technology Utilization | In English | → Engineering, technology |
| TUAG | Telecommunication Users Advisory Group | In English | → Organizations and associations → Telecommunications |
| TUASB | Tokyo University Institute of Space and Aeronautical Science Bulletin | In English | → Serial publications, periodicals → Astronomy → Aeronautics, aircraft → Astronautics |
| TUASR | Tokyo University Institute of Space and Aeronautical Science Report | In English | → Serial publications, periodicals → Astronomy → Aeronautics, aircraft → Astronautics |
| TÜBİSAD | Türkiye Bilişim Sanayicileri ve İşadamları Derneği (www.tubisad.org.tr) | In Turkish | → Associations → Computer science → Telecommunications → Turkey |
| TÜBİTAK | Türkiye Bilimsel ve Teknolojik Araştırma Kurumu (https://www.tubitak.gov.tr) | In Turkish | → Organizations and associations → Research policy → Engineering, technology → Turkey |
| TUFEJ | Tokyo University Faculty of Engineering Journal Series | In English | → Serial publications, periodicals → Engineering, technology |
| TUFER | Tokyo Denki University Faculty of Engineering Research Reports | In English | → Serial publications, periodicals → Engineering, technology |
| TUISR | Tokyo University Institute Industrial Science Report | In English | → Serial publications, periodicals → Mathematics and natural sciences |
| TULIPE | Transfert d'Urgence de l'Industrie Pharmaceutique | In French | → Pharmacology, toxicology |
| TURP | Tarifs d'Utilisation des Réseaux Publics | In French | → Electrical engineering |
| TUS | Tıpta Uzmanlık Eğitimi Giriş Sınavı | In Turkish | → Higher education, universities → Medicine |
| TÜV | Technischer Überwachungsverein | In German | → Organizations and associations |
| TV | Target Vehicle | In English | → Vehicle engineering |
| TV | Television | In English | → Telecommunications |
| TV | Thrust Vector | In English | → Vehicle engineering |
| TV | Transport(er) Vehicle | In English | → Vehicle engineering |
| TVA | Taxe sur la Valeur Ajoutée | In French | → Taxes, duties → Accounting |
| TVA | Thrust Vector Alignment | In English | → Astronautics |
| TVC | Thrust Vector Control | In English | → Vehicle engineering |
| TVCD | Thrust Vector Control Driver | In English | → Vehicle engineering |
| TVCG | Televizija Crne Gore | In Serbian | → Telecommunications |
| TVCS | Thrust Vector Control System | In English | → Vehicle engineering |
| TVE | Technology Validation Experiment | In English | → Engineering, technology |
| TVEXPIS | TV Experiment Interconnecting Station | In English | → Telecommunications |
| TVFI | Télévision Française Internationale | In French | → Telecommunications → France |
| TVHD | Télévision Haute Définition | In French | → Telecommunications |
| TVMA | Texas Veterinary Medical Association (www.tvma.org) | In English | → Associations → Veterinary medicine → United States |
| TVO | Trouble Ventilatoire Obstructif | In French | → Chest diseases |
| TVP | Thrombose Veineuse Profonde | In French | → Blood and circulatory system → Pathology |
| TVR | Televiziunea Română | In Romanian | → Telecommunications |
| TVS | Transient Voltage Suppressor | In English | → Electronics |
| TVS | Transient Voltage Suppression | In English | → Electronics |
| TVSA | Thrust Vector Servoamplifier | In English | → Vehicle engineering |
| TVSML | Télévision Mobile Sans Limite | In French | → Telecommunications |
| TVSSIS | TV Subsystem Interconnecting Station | In English | → Telecommunications |
| TVT | Toulon Var Technologies (www.tvt.fr) | In French | → Research policy → Engineering, technology → France |
| TW | Technische Wetenschappen | In Dutch | → Engineering, technology |
| TW/AA | Tactical Warning/Attack Assessment | In English | → Military affairs → Military engineering |
| TWU | Transportation Workers Union of America (www.twu.com) | In English | → Organizations and associations → Labour, labour economics → Transport and postal services → United States |
| TWX | Teletype Wire Transmission | In English | → Telecommunications |
| TX | Transmit Channel | In English | → Telecommunications |
| TxDOT | Texas Department of Transportation | In English | → Regional administration → Transport and postal services → Vehicle engineering → United States |
| TYLCV | Tomato Yellow Leaf Curl Virus | In English | → Virology → Agricultural sciences |
| TZW | Technologiezentrum Wasser (www.tzw.de) | In German | → Research institutes → Environmental technology, water supply, waste management → Germany |
| U3P | Union pour la Promotion de la Propulsion Photonique (www.u3p.net) | In French | → Organizations and associations → Astronautics |
| UA | Urgence Absolue | In French | → Traumatology |
| UAEA | Uluslararası Atom Enerji Ajansı (www.iaea.org) = IAAE | Internacia Agentejo pri Atom-Energio | In Esperanto = 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 = IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ | In Thai = EANA | Energia Atomikoaren Nazioarteko Agentzia | In Basque |
In Turkish | → International relations → Energy economics → Nuclear technology |
| uAEM | Universities Allied for Essential Medicines | In English | → Higher education, universities → Medicine |
| UAL | United Airlines (https://www.united.com) | In English | → Transport by air → United States |
| UAPET | Updates in Applied Physics and Electrical Technology | In English | → Serial publications, periodicals → Engineering, technology → Electrical engineering |
| UAR | Upper Austrian Research (https://www.uar.at/) | In English | → Research institutes → Research policy → Engineering, technology → Austria |
| UARS | Upper Atmosphere Research Satellite | In English | → Meteorology, climatology → Astronautics |
| UART | Universal Asynchronous Receiver Transmitter | In English | → Telecommunications |
| UASER | Ultrasound Amplification by Stimulated Emission of Radiation | In English | → Engineering, technology → Acoustics |
| UAT | Union Aéromaritime de Transport | In French | → Transport and postal services |
| UAW | United Auto Workers | In English | → Organizations and associations → Labour, labour economics → Automobile manufacturing |
| UB | Unité Bethesda | In French | → Diagnostics → Blood and circulatory system → Immunology and allergy |
| UB | Utility Bridge | In English | → Civil engineering → Construction |
| UB | Unité de Brillance | In French | → Lighting, illumination engineering |
| UBCNA | Union Belge Contre les Nuisances des Avions | In French | → Organizations and associations → Transport and postal services |
| UBF | Unique Brand Factory (www.ubf.com.tr) | In English | → Advertising |
| UBMD | University at Buffalo Medical Doctor | In English | → Higher education, universities → Medicine |
| UC | Ulcerative Colitis | In English | → Pathology |
| UCAF | Universal Cardholder Authentication Field | In English | → Computer-based techniques → Electronics |
| UCB | Union du Crédit pour le Bâtiment | In French | → Banks → Construction → France |
| UCD | Urine Collection Device | In English | → Environmental technology, water supply, waste management |
| UCE | Unsolicited Commercial Email | In English | → Networks, communication → Telecommunications |
| UCI | Union des Constructeurs Immobiliers | In French | → Organizations and associations → Construction |
| UCN | Unité Comptable Nationale | In French | → Accounting |
| UCPTE | Union pour la Coordination de la Production et du Transport d'Électricité | In French | → Organizations and associations → Electrical engineering |
| UCS | Unité Communale de Santé | In French | → Medicine |
| UCTA | Urine Collection Transfer Assembly | In English | → Environmental technology, water supply, waste management |
| UDA | Union Des Annonceurs | In French | → Organizations and associations → 659 |
| UDDI | Universal Description Discovery and Integration | In English | → Networks, communication → Telecommunications |
| UDECAM | Union des Entreprises de Conseil et Achat Média | In French | → Organizations and associations → 659 |
| UDIC | Union française des Distributeurs, Grossistes et Importateurs en Chaussures | In French | → Organizations and associations → Trade → Leather industry → France |
| UDMH | Unsymmetrical Dimethylhydrazine | In English | → Chemical technology |
| UDMH/H | Unsymmetrical Dimethylhydrazine Hydrazine Blend | In English | → Chemical technology |
| UDSP | Union Départementale des Sapeurs-Pompiers | In French | → Organizations and associations → Firefighting |
| UDWDM | Ultra Dense Wavelength Division Multiplexing | In English | → Networks, communication → Telecommunications |
| UEA | United Energy Associates (www.uea.com) | In English | → Energy economics → Electrical engineering → Environmental technology, water supply, waste management |
| UEA | Urban Exploration Alberta | In English | → Civil engineering → Canada |
| UEAtc | Union Européenne pour l'Agrément technique dans la construction | In French | → Organizations and associations → Construction |
| UECBu | University Electro-Communications Bulletin | In English | → Serial publications, periodicals → Telecommunications |
| UEF | Unité équivalent fibrinogène | In French | → Physiology |
| UEM | Union Européenne Motocyclisme | In French | → Organizations and associations → Transport and postal services |
| UEPG | Union Européenne des Producteurs de Granulats (www.uepg.eu) | In French | → Organizations and associations → Civil engineering → Construction → Europe |
| UER | Union Européenne de Radio-télévision (www.ebu.ch) = EBU | European Broadcasting Union | In English = ЕСРТ | Европейски съюз за радио и телевизия | In Bulgarian = ЄТС | Європейський Телерадіомовний Союз | In Ukrainian = ЕВС | Европейский вещательный союз | In Russian = UER | União Europeia de Radiodifusão | In Portuguese |
In French | → Organizations and associations → Telecommunications |
| UER | União Europeia de Radiodifusão (www.ebu.ch) = EBU, ЕСРТ, ЄТС, ЕВС (look above) |
In Portuguese | → Organizations and associations → Telecommunications |
| UES | Unified Energy System = ЕЭС | Единые Энергетические Системы | In Russian |
In English | → Energy economics → Electrical engineering |
| UFARCO | Union Française des Associations Régionales de Consultants | In French | → Organizations and associations → Consulting → France |
| UFAW | Universities Federation for Animal Welfare (www.ufaw.org.uk) | In English | → Organizations and associations → Higher education, universities → Veterinary medicine → United Kingdom |
| UFCC | Union Française du Commerce Chimique | In French | → Organizations and associations → Trade → Food technology → France |
| UFE | Uterine Fibroid Embolisation | In English | → Medicine |
| UFE | Union Française de l'Électricité | In French | → Organizations and associations → Electrical engineering → France |
| UFM | Union Française des Maréchaux-ferrants | In French | → Organizations and associations → France |
| UFM | Utilisateurs Francophones de Medidoc/Clinidoc | In French | → Organizations and associations → Computer science → Medicine |
| UFO | Unidentifiziertes Flugobjekt = OVNI | Objet Volant Non Identifié | In French = OVNI | Objecte Volador No Identificat | In Catalan = НЛО | Неидентифициран летящ обект | In Bulgarian = OVNI | Objeto Volador No Identificado | In Spanish = UFO | Unidentified Flying Object | In English = UFO | Unknown Flying Object | In English = UFO | Uidentificeret flyvende objekt | In Danish = NIFO | Neidentigita Fluganta Objekto | In Esperanto = UFO | Unbekend fleanend objekt | In Frisian = עב"מ | עצם בלתי מזוהה | In Hebrew = OVNI | Oggetto Volante Non Identificato | In Italian = NLO | Neidentificēts lidojošs objekts | In Latvian = UFO | Uidentifisert flygende objekt | In Norwegian = UFO | Uidentifisert flygande objekt | In Nynorsk = NOL | Niezidentyfikowany Obiekt Latający | In Polish = OVNI | Objeto Voador Não Identificado | In Portuguese = OZN | Obiect Zburător Neidentificat | In Romanian = НЛО | Неопознанный летающий объект | In Russian = NLO | Neidentifikovani leteći objekat | In Serbo-Croatian |
In German | → Astronautics |
| UFO | Unidentified Flying Object = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In English | → Astronautics |
| UFO | Unknown Flying Object = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In English | → Astronautics |
| UFO | Uidentificeret flyvende objekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Danish | → Astronautics |
| UFO | Unbekend fleanend objekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Frisian | → Astronautics |
| UFO | Uidentifisert flygende objekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Norwegian | → Astronautics |
| UFO | Uidentifisert flygande objekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Nynorsk | → Astronautics |
| UFP | Usinage et Formage des Plastiques | In French | → Plastic industry |
| UGB | Unité Gros Bétail | In French | → Agricultural sciences |
| UHCW | Unquy hark'aypa chaskisqa waqlliynin = 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 = HIES | Hartutako Immuno Eskasiaren Sindromea | In Basque = SIDA | Síndrome de Inmunodeficiencia Adquirida | In Spanish = SEIF | Siondróm Easpa Imdhíonachta Faighte | In Irish = AIDS | Annlochd Inneamh Dìon-Slàinte | In Scottish Gaelic = 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 = 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 Quechua | → Immunology and allergy → Infectious diseases |
| UHF | Ultra High Frequency = УКВ | Ультракороткие волны | In Russian = UKW | Ultrakurzwelle | In German |
In English | → Telecommunications |
| UHF/VHF | Ultra High Frequency/Very High Frequency | In English | → Telecommunications |
| UIC | Union Internationale des Chemins de fer | In French | → Transport and postal services |
| UIC | Universal Instruments Corporation | In English | → Engineering, technology |
| UIC | Union des Industries Chimiques (www.uic.fr) | In French | → Organizations and associations → Chemical technology → France |
| UICB | International Union of Building Centres (www.uicb.org) | In English | → Organizations and associations → Construction |
| UICC | Universal Integrated Circuit Card | In English | → Electronics |
| UIMM | Union des Industries et Métiers de la Métallurgie (www.uimm.fr) | In French | → Organizations and associations → Metallurgy → France |
| UIOM | Usine d'Incinération des Ordures Ménagères | In French | → Environmental technology, water supply, waste management |
| UIT | Union Internationale des Télécommunications = ITU | International Telecommunication Union | In English = IUT | Internacia Unio pri Telekomunikado | In Esperanto |
In French | → Organizations and associations → Telecommunications |
| UIV | Urographie intraveineuse | In French | → Diagnostics |
| UKAEA | United Kingdom Atomic Energy Agency | In English | → Public administration, government → Energy economics → Nuclear technology |
| UKG | Ultraschallkardiographie | In German | → Diagnostics → Cardiology |
| UKIB | United Kingdom Independent Broadcasting | In English | → Telecommunications |
| UKIMWI | Upungufu wa Kinga Mwilini = UHCW, AIDS, SIDA, VIGS, СПИН, QİÇS, HIES, SEIF, ՁԻԱՀ, SCDI, 에이즈, შიდსი, СИДА, СПИД, СНІД (look above) |
In Swahili | → Immunology and allergy → Infectious diseases |
| UKW | Ultrakurzwelle = UHF, УКВ (look above) |
In German | → Telecommunications |
| ULO | Unmanned Launch Operations | In English | → Astronautics |
| ULV | Unmanned Launch Vehicle | In English | → Astronautics |
| UMC | Universitair Medisch Centrum | In Dutch | → Higher education, universities → Medicine |
| UMCC | University Malaya Medical Centre | In English | → Higher education, universities → Medicine |
| UMCPG | Union des Mutuelles des Cheminots et des Personnels du Groupe SNCF | In French | → Transport and postal services |
| UMEA | Universala Medicina Esperanto Asocio | In Esperanto | → Associations → Medicine → Artificial languages (linguistics) |
| UMGO | Union de la Maçonnerie et du Gros Oeuvre (www.umgo.ffbatiment.fr) | In French | → Organizations and associations → Construction → France |
| UMH | Unité Mobile Hospitalière | In French | → Traumatology |
| UMIF | Upper Mechanical Integration Frame | In English | → Mechanical engineering |
| UMLS | Unified Medical Language System | In English | → Computer science → Artificial intelligence → Linguistics → Medicine |
| UMMI | Unione Medico Missionaria Italiana | In Italian | → Organizations and associations → Medicine → Italia |
| UMO | Unmanned Orbital | In English | → Astronautics |
| UMP | Unique Medical Proposition | In English | → Medicine |
| UMPS | Unité de Médecine et Physiologie Spatiales | In French | → Medicine → Physiology → Astronautics |
| UMRK | Utility Muffin Research Kitchen | In English | → Acoustical engineering → Music |
| UMS | Urganizazziun mundiala da la Santaa = MOS | Monda Organiz(aĵ)o pri Sano | In Esperanto = WHO | World Health Organization | In English = OMS | Organisation Mondiale de la Santé | In Esperanto = OMS | Organizzazione Mondiale della Sanità | In Italian = WGO | Wêreldgesondheidsorganisasie | In Afrikaans = OMS | Organización Mundial de la Salú | In Asturian = СЗО | Световната здравна огранизация | In Bulgarian = SZO | Světová zdravotnická organizace | In Czech = OMS | Organització Mundial de la Salut | In Catalan = OMS | Organización Mundial de la Salud | In Spanish = MTO | Maailma Terviseorganisatsioon | In Estonian = MOE | Munduko Osasun Erakundea | In Basque = OMS | Organisacion mondiâla de la sandât | In Franco-Provençal = OMS | Organización Mundial da Saúde | In Galician = SZO | Svjetska zdravstvena organizacija | In Croatian = RTD | Rêxistina Tendurustiyê ya Dinyayê | In Kurdish = PSO | Pasaulio sveikatos organizacija | In Lithuanian = PVO | Pasaules veselības organizācija | In Latvian = ÜST | Ümumdünya Səhiyyə Təşkilatı | In Turkish |
In Lombard | → United Nations → Medicine |
| UMTS | Universal Mobile Telecommunications System | In English | → Telecommunications |
| UMVF | Université Médicale Virtuelle Francophone (www.umvf.prd.fr) | In French | → Higher education, universities → Medicine → Internet → France |
| UMVF | Unmanned Vertical Flight | In English | → Aeronautics, aircraft → Astronautics |
| UNCGFL | Union Nationale de Commerce en Gros de Fruits et Légumes | In French | → Organizations and associations → Trade → Food technology |
| UNCMI | Union Nationale des Constructeurs de Maisons Individuelles (http://uncmi.org) | In French | → Organizations and associations → Construction |
| UNE | Unbundled Network Elements | In English | → Networks, communication → Telecommunications |
| UnECR | University Electro-Communications Reports | In English | → Serial publications, periodicals → Telecommunications |
| UNELEG | Union Nationale des Entreprises Locales d'Électricité et de Gaz | In French | → Organizations and associations → Electrical engineering → Energy economics |
| UNETEL | Union Nationale des Entreprises de Télécommunications | In French | → Organizations and associations → Telecommunications |
| UNGG | Uranium Naturel Graphite Gaz | In French | → Nuclear technology |
| UNIC | Union Nationale de l'Imprimerie et de la Communication graphique | In French | → Organizations and associations → Graphic industries, printing, publishing |
| UNICEM | Union Nationale des Industries de Carrières et Matériaux de Construction (www.unicem.fr) | In French | → Organizations and associations → Mining → Civil engineering → Construction → France |
| UNIDIR | United Nations Institute for Disarmament Research (www.unidir.org) | In English | → United Nations → Military engineering → Polemology |
| UNIFA | Union Nationale des Industries Françaises de l'Ameublement | In French | → Organizations and associations → 68 → France |
| UNIPE | Unité Nationale de l'Ingénierie du Parc en Exploitation | In French | → Energy economics → Electrical engineering |
| UNIPEDE | UNion Internationale des Producteurs Et Distributeurs d'Énergie Électrique | In French | → Organizations and associations → Electrical engineering |
| UNIT | Université Numérique Ingénierie et Technologie | In French | → Higher education, universities → Engineering, technology → Central administration |
| UNITEC | Universidad Tecnológica Centroamericana | In Spanish | → Higher education, universities → Engineering, technology |
| UNOOSA | United Nations Office for Outer Space Affairs | In English | → United Nations → Astronomy → Astronautics |
| UNOSTRA | Union Nationale des Organisations Syndicales de Transport Routier Automobile | In French | → Organizations and associations → Transport and postal services |
| UNPG | Union Nationale des Producteurs de Granulats | In French | → Organizations and associations → Civil engineering → Construction |
| UNPG | Union Nationale de Producteurs de Granulats (www.unpg.fr) | In French | → Organizations and associations → Civil engineering → Construction → France |
| UNPSA | United Nations Programme on Space Applications | In English | → United Nations → Astronomy → Astronautics |
| UNSC | United Nations Space Command | In English | → Military affairs → United Nations → Astronautics |
| UNSC | Unité de Nutrition et Signalisation Cellulaire | In French | → Research institutes → Nutrition → Physiology → Biotechnology |
| UNTEC | Union Nationale des Économistes de la Construction et des Coordonnateurs (www.untec.com) | In French | → Organizations and associations → Economics → Construction |
| UOD | Unique Oligo Design | In English | → Software → Biotechnology → Genetics → Enzymes |
| UoSAT | University of Surrey Satellite | In English | → Higher education, universities → Astronautics |
| UPB | Université Polytechnique de Bucarest | In French | → Specialized or polytechnical colleges → Engineering, technology → Romania |
| UPB | Universitatea Politehnica (din) Bucureşti | In Romanian | → Specialized or polytechnical colleges → Engineering, technology |
| UPCP | Union Professionnelle de la Carte Postale (www.upcp.fr) | In French | → Organizations and associations → Graphic industries, printing, publishing → Postal services → France |
| UPCS | Unlicensed Personal Communications Services | In English | → Telecommunications |
| UPE | Universitäre Palliativmedizinische Einrichtung | In German | → Medicine |
| UPFC | Unified Power Flow Controller | In English | |
| UPGCAF | Union Professionnelle des Grossistes en Confiserie et Alimentation Fine | In French | → Organizations and associations → Food technology |
| UPS | Uninterruptible Power System | In English | → Electrical engineering |
| UPS | Upright Perigee Stage | In English | → Astronautics |
| UPS | Uninterrupted Power Supply | In English | → Energy economics → Electrical engineering |
| UPS | Uninterruptible Power Supply | In English | → Electrical engineering |
| UPU | Union Postale Universelle (www.upu.int) = UPU | Universala Poŝt-Unio | In Esperanto = UPU | Universal Postal Union | In English |
In French | → Organizations and associations → United Nations → Postal services → Standardization |
| UPU | Universala Poŝt-Unio (www.upu.int) = (look above) |
In Esperanto | → Organizations and associations → United Nations → Postal services → Standardization |