| TME | Team für Marketing-Erfolge | In German | → 659 |
| TME | Transfer Multisort Electronic | In English | → Electronics |
| TMECO | Time of Main Engine Cutoff | In English | → Spaceflight engineering, astronautics |
| TMG | Thermal Meteoroid Garment | In English | → Spaceflight engineering, astronautics |
| TMI | Transmars Injection | In English | → Spaceflight engineering, astronautics |
| TMI | Taux de Mortalité Infantile = ММВБ | Московская межбанковская валютная биржа | In Russian = MICEX | Moscow Interbank Currency Exchange | In English = МБВБ | Мускав банксен валютă биржи | In Chuvash = AKB | Angka Kematian Bayi | In Indonesian = IMR | Infant Mortality Rate | In English = TMI | Taxa de Mortalidade Infantil | In Portuguese = TMI | Taxa de Mortalitat Infantil | In Catalan |
In French | → Statistics → Pediatry |
| TMI | Taxa de Mortalitat Infantil = ММВБ, MICEX, МБВБ, AKB, IMR (look above) |
In Catalan | → Statistics → Pediatry |
| TMI | Taxa de Mortalidade Infantil = ММВБ, MICEX, МБВБ, AKB, IMR (look above) |
In Portuguese | → Statistics → Pediatry |
| TMK | Teknologi Maklumat dan Komunikasi = TIC | Tecnologías de la Información y la Comunicación | In Spanish = IKT | Informations- und Kommunikationstechnologie | In German = TIC | Technologies de l'Information et de la Communication | In French = ICT | Information and Communications Technology | In English = IKT | Informations- og kommunikationsteknologi | In Danish = IKT | Inligtings- en kommunikasietegnologie | In Afrikaans = ICT | Informatie- en Communicatietechnologie | In Dutch |
In Malay | → Computer science → Telecommunications |
| TMN | Telecommunications Management Network | In English | → Telecommunications |
| TMN | Tétanos Maternel et Néonatal | In French | → Pathology |
| TMOPR | Telecommunications and Mission Operations Progress Report | In English | → Serial publications, periodicals → Telecommunications |
| TMP | Télévision Mobile Personnelle | In French | → Telecommunications |
| TMP | Thermo-Mécanique et Plasticité | In French | → 620 → Mechanical engineering → Chemical technology |
| TMR | TOPEX Microwave Radiometer | In English | → Spaceflight engineering, astronautics |
| TMS | Troubles Musculo-Squelettiques | In French | → Pathology |
| TMS | Thermal Management Solutions | In English | → Energy economics |
| TMT | Thermally Modified Timber | In English | → Paper and board industry |
| TnaG | Teilifís na Gaeilge | In Irish | → Telecommunications |
| TNF | Tumor/Tumour Necrosis Factor | In English | → Biochemistry, biophysics → Oncology |
| TNP | Traité de Non Prolifération des armes nucléaires | In French | → International relations → Military engineering → Nuclear technology |
| TNS | Total Network Solutions (www.tns.co.uk) | In English | → Hardware → 6218 → Telecommunications |
| TNS | Transaction Network Services (www.tnsi.com) | In English | → Networks, communication → Telecommunications |
| TNS | Tahiti Nui Satellite (www.tns.pf) | In French | → Telecommunications |
| TNT | Trinitrotolueno = TNT | Trinitrotoluol | In German = TNT | Trinitrotoluè | In Catalan = TNT | Trinitrotoluen | In Czech = TNT | Trinitrotoluene | In English = TNT | Trinitrotolueno | In Spanish = TNT | Trinitrotoluenori | In Basque = TNT | ترینیتروتولوئن | In Persian = TNT | Trinitrotoluène | In French = TNT | Trinitrotoluene | In Italian = TNT | Trinitrotoluolas | In Lithuanian = TNT | Trinitrotolueen | In Dutch = TNT | Trinitrotoluen | In Nynorsk = TNT | Trinitrotoluen | In Norwegian = TNT | Trinitrotolueno | In Portuguese = TNT | Trinitrotoluen | In Romanian = TNT | Тринитротолуол | In Russian = TNT | Trinitrotoluen | In Slovenian = ТНТ | Тринитротоулен | In Serbian = TNT | ทีเอ็นที | In Thai = TNT | Trinitrotoluen | In Turkish = ТНТ | Тринітротолуол | In Ukrainian |
In Esperanto | → Chemicals → Military engineering |
| TNT | Trinitrotoluol = ТНТ (look above) |
In German | → Chemicals → Military engineering |
| TNT | Trinitrotoluè = ТНТ (look above) |
In Catalan | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Norwegian | → Chemicals → Military engineering |
| TNT | Trinitrotoluenori = ТНТ (look above) |
In Basque | → Chemicals → Military engineering |
| TNT | ترینیتروتولوئن = ТНТ (look above) |
In Persian | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Romanian | → Chemicals → Military engineering |
| TNT | Trinitrotoluène = ТНТ (look above) |
In French | → Chemicals → Military engineering |
| TNT | Trinitrotoluene = ТНТ (look above) |
In Italian | → Chemicals → Military engineering |
| TNT | Trinitrotoluolas = ТНТ (look above) |
In Lithuanian | → Chemicals → Military engineering |
| TNT | Trinitrotolueen = ТНТ (look above) |
In Dutch | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Nynorsk | → Chemicals → Military engineering |
| TNT | Тринитротолуол = ТНТ (look above) |
In Russian | → Chemicals → Military engineering |
| TNT | Trinitrotolueno = ТНТ (look above) |
In Portuguese | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Slovenian | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Czech | → Chemicals → Military engineering |
| TNT | ทีเอ็นที = ТНТ (look above) |
In Thai | → Chemicals → Military engineering |
| TNT | Trinitrotoluene = ТНТ (look above) |
In English | → Chemicals → Military engineering |
| TNT | Trinitrotoluen = ТНТ (look above) |
In Turkish | → Chemicals → Military engineering |
| TNT | Trinitrotolueno = ТНТ (look above) |
In Spanish | → Chemicals → Military engineering |
| TNT | Télévision Numérique Terrestre | In French | → Telecommunications |
| TO | Takeoff | In English | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| TOC | Troubles Obsessionnels Compulsifs | In French | → Psychology → Neurology |
| TOI | Transfer Orbit Insertion | In English | → Spaceflight engineering, astronautics |
| TOI | Transport Okonomik Institut | In Norwegian | → Economics → Transport and postal services |
| TOP | Technical Office Protocol | In English | → Engineering, technology |
| TOPS | Transfer Orbit Perigee Stage | In English | → Spaceflight engineering, astronautics |
| TOPS | Transistorized Operational Phone System | In English | → Telecommunications |
| TOR | Telex-on-Radio | In English | → Telecommunications |
| TOS | Transfer Orbit Stage | In English | → Spaceflight engineering, astronautics |
| TOW | Tank and Orbiter Weight | In English | → Spaceflight engineering, astronautics |
| TP | Time to Perigee | In English | → Spaceflight engineering, astronautics |
| TP | Turbopump | In English | → Mechanical engineering |
| TP | Temps de Prothrombine | In French | → Blood and circulatory system |
| TPA | Tissue Plasminogen Activator | In English | → Enzymes → Blood and circulatory system |
| TPA | Turbopump Assembly | In English | → Mechanical engineering |
| TPC | Turkish Petroleum Company | In English | → 665 |
| TPL | Transpacific Landing | In English | → Spaceflight engineering, astronautics |
| TPMS | Tire Pressure Monitoring System | In English | → Automobile manufacturing |
| TPN | Tarif de Première Nécessité | In French | → Prices → Electrical engineering |
| TPOCP | Turbopump Oxidizer Cavity Purge | In English | → Mechanical engineering |
| TPSGC | Travaux Publics et Services Gouvernementaux Canada | In French | → Public administration, government → Civil engineering |
| TPV | Technologiepark Villach | In German | → Engineering, technology |
| TQFP | Thin Quad Flat Pack | In English | → Electronics |
| TR | Time to Retrofire | In English | → Spaceflight engineering, astronautics |
| TR | Transistor/Receiver | In English | → Telecommunications |
| TR | Transmitter/Receiver | In English | → Telecommunications |
| TR/SBS | TeleOperator Retrieval/Skylab Boost System | In English | → Spaceflight engineering, astronautics |
| TRAIL | Tumor necrosis factor Related Apoptosis Inducing Ligand | In English | → Biochemistry, biophysics → Oncology |
| TRB | Transport Research Board | In English | → Transport and postal services |
| TRDDS | Teal Ruby Data Documentation System | In English | → Spaceflight engineering, astronautics |
| TRDF | Teal Ruby Data Formatter | In English | → Spaceflight engineering, astronautics |
| TRE | Teal Ruby Experiment | In English | → Spaceflight engineering, astronautics |
| TRE/ITU | Teal Ruby Experiment/Infrared Telescope Unit | In English | → Astronomy → Spaceflight engineering, astronautics |
| TREN | TRansport et ÉNergie | In French | → Energy economics → Transport and postal services |
| TRET | Telecommunications and Radio Engineering Telecommunications | In English | → Serial publications, periodicals → Telecommunications |
| TRF | Tuned Radio Frequency | In English | → Telecommunications |
| TrGRC | Geothermal Resources Council Transactions | In English | → Serial publications, periodicals → Earth sciences → Energy economics |
| TRIGR | Trial to Reduce IDDM in the Genetically at Risk | In English | → Medicine |
| TRL | Transport Research Laboratory | In English | → Research institutes → Transport and postal services |
| TRM | Teleradio-Moldova (www.trm.md) | [MD] | → Telecommunications |
| TRS | Teal Ruby Spacecraft | In English | → Spaceflight engineering, astronautics |
| TRT | Transportation Research Thesaurus | In English | → Transport and postal services |
| TS | Technical Support | In English | |
| TS | Tuberøs Sklerose = TS | Tuberous Sclerosis | In English = ET | Esclerosis Tuberosa | In Spanish |
In Norwegian | → Neurology |
| TS | Tuberous Sclerosis = ET (look above) |
In English | → Neurology |
| TSC | Technical Support Center | In English | |
| TSE | Transportation Support Equipment | In English | → Vehicle engineering → Transport and postal services |
| TSE | Transmissible Spongiforme Enzephalopathie | In German | → Neurology → Veterinary medicine |
| TSI | Tuberous Sclerosis International | In English | → Organizations and associations → Neurology |
| TSIS | Traffic Software Integrated System | In English | → Software → Transport and postal services |
| TSIV | Tubereuze Sclerosis in Vlaanderen | In Dutch | → Organizations and associations → Neurology |
| TSP | Trajectory Shaping Program | In English | → Software → Spaceflight engineering, astronautics |
| TSP | Trajectory Synthesis Program | In English | → Software → Spaceflight engineering, astronautics |
| TsPK | Tsentr Podgotovka Kosmonavti | In Russian | → Spaceflight engineering, astronautics |
| TSS | Tethered Satellite System | In English | → Spaceflight engineering, astronautics |
| TSS | Telephony Softswitch | In English | → Telecommunications |
| TT | Thrust Termination | In English | → Vehicle engineering |
| TT&C | Tracking, Telemetry, and Control | In English | → Spaceflight engineering, astronautics |
| TT&C | Tracking, Telemetry, and Command | In English | → Spaceflight engineering, astronautics |
| TT&C | Telemetry, Tracking, and Communications | In English | → Spaceflight engineering, astronautics → Telecommunications |
| TTA | Time To Apogee | In English | → Astronomy → Spaceflight engineering, astronautics |
| TTA | Thermomechanical Test Area | In English | → Mechanical engineering |
| TTBS | Timber Trades’ Benevolent Society | In English | → Organizations and associations → Timber and woodworking industry |
| TTBS | Thames Traditional Boat Society | In English | → Organizations and associations → 6295 |
| TTC | Telemetry, Telecommand and Control | In English | → Spaceflight engineering, astronautics |
| TTC | Telecommunications Technology Committee | In English | → Telecommunications |
| TTCA | Thrust Translation Controller Assembly | In English | → Vehicle engineering |
| TTCV | Tracking, Telemetry, Command, and Voice | In English | → Spaceflight engineering, astronautics → Telecommunications |
| TTD | Temps de Thromboplastine Dilué | In French | → Blood and circulatory system |
| TTENP | Transport Électricité Normandie Paris | In French | → Electrical engineering |
| TTL | Transistor-Transistor Logic | In English | → Electronics |
| TTO | Technology Transfer Office | In English | → Engineering, technology |
| TTP | Time Triggered Protocol | In English | → Engineering, technology |
| TTP | Thrombotic Thrombocytopenic Purpura | In English | → Blood and circulatory system → Pathology |
| TTP | Transports Terrestres Promotion | In French | → Transport and postal services |
| TTP | Time To Perigee | In English | → Astronomy → Spaceflight engineering, 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 |
| TTY | Teletype | In English | → Telecommunications |
| 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 → 6297 |
| TUASR | Tokyo University Institute of Space and Aeronautical Science Report | In English | → Serial publications, periodicals → Astronomy → Aeronautics, aircraft → 6297 |
| TÜBİTAK | Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | In Turkish | → Engineering, technology |
| 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 |
| TULIPE | Transfert d'Urgence de l'Industrie Pharmaceutique | In French | → Pharmacology, toxicology |
| TURP | Tarifs d'Utilisation des Réseaux Publics | In French | → Electrical engineering |
| TÜV | Technischer Überwachungsverein | In German | |
| TV | Television | In English | → Telecommunications |
| TV | Target Vehicle | In English | → Vehicle engineering |
| TV | Transport(er) Vehicle | In English | → Vehicle engineering |
| TV | Thrust Vector | In English | → Vehicle engineering |
| 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 |
| TVHD | Télévision Haute Définition | In French | → Telecommunications |
| TVP | Thrombose Veineuse Profonde | In French | → Blood and circulatory system → Pathology |
| TVR | Televiziunea Română | In Romanian | → Telecommunications |
| TVSA | Thrust Vector Servoamplifier | In English | → Vehicle engineering |
| TVSML | Télévision Mobile Sans Limite | In French | → Telecommunications |
| TVSSIS | TV Subsystem Interconnecting Station | In English | → Telecommunications |
| TW | Technische Wetenschappen | In Dutch | → Engineering, technology |
| TW/AA | Tactical Warning/Attack Assessment | In English | → 355 → Military engineering |
| TWU | Transportation Workers Union of America | In English | → Organizations and associations → Labour, labour economics → Transport and postal services |
| TWX | Teletype Wire Transmission | In English | → Telecommunications |
| TX | Transmit Channel | In English | → Telecommunications |
| 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 |
| U3P | Union pour la Promotion de la Propulsion Photonique | In French | → Spaceflight engineering, astronautics |
| 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 | In English | → Transport and postal services |
| UAR | Upper Austrian Research | In English | → Research policy → Engineering, technology |
| UARS | Upper Atmosphere Research Satellite | In English | → Meteorology, climatology → Spaceflight engineering, astronautics |
| UART | Universal Asynchronous Receiver Transmitter | In English | → Telecommunications |
| UASER | Ultrasound Amplification by Stimulated Emission of Radiation | In English | → Engineering, technology → Acoustics |
| UAW | United Auto Workers | In English | → Organizations and associations → Labour, labour economics → Automobile manufacturing |
| UB | Unité Bethesda | In French | → Medicine |
| 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 → Building |
| UCPTE | Union pour la Coordination de la Production et du Transport d’Électricité | In French | → Organizations and associations → Electrical engineering |
| 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 |
| UDMH | Unsymmetrical Dimethylhydrazine | In English | → Chemical technology |
| UDMH/H | Unsymmetrical Dimethylhydrazine Hydrazine Blend | In English | → Chemical technology |
| UDWDM | Ultra Dense Wavelength Division Multiplexing | In English | → Networks, communication → Telecommunications |
| UEA | Urban Exploration Alberta | In English | → Civil engineering |
| UEA | United Energy Associates | In English | → Energy economics → Electrical engineering → Environmental technology, water supply, waste management |
| UEAtc | Union Européenne pour l'Agrément technique dans la construction | In French | → Organizations and associations → Building |
| 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 → Building |
| UER | União Europeia de Radiodifusão (www.ebu.ch) = EBU | European Broadcasting Union | In English = UER | Union Européenne de Radio-télévision | In French = ЕСРТ | Европейски съюз за радио и телевизия | In Bulgarian = ЄТС | Європейський Телерадіомовний Союз | In Ukrainian = ЕВС | Европейский вещательный союз | In Russian |
In Portuguese | → Organizations and associations → Telecommunications |
| UER | Union Européenne de Radio-télévision (www.ebu.ch) = EBU, ЕСРТ, ЄТС, ЕВС (look above) |
In French | → Organizations and associations → Telecommunications |
| UES | Unified Energy System = ЕЭС | Единые Энергетические Системы | In Russian |
In English | → Energy economics → Electrical engineering |
| UFCC | Union Française du Commerce Chimique | In French | → Organizations and associations → Trade → Food technology |
| UFE | Union Française de l’Électricité | In French | → Organizations and associations → Electrical engineering |
| UFE | Uterine Fibroid Embolisation | In English | → Medicine |
| UFM | Union Française des Maréchaux-ferrants | In French | → Organizations and associations |
| UFM | Utilisateurs Francophones de Medidoc/Clinidoc | In French | → Organizations and associations → Computer science → Medicine |
| UFO | Uidentificeret flyvende objekt = 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 | Unidentifiziertes Flugobjekt | In German = UFO | Unidentified Flying Object | In English = UFO | Unknown Flying Object | In English = 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 Danish | → Spaceflight engineering, astronautics |
| UFO | Uidentifisert flygande objekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In Nynorsk | → Spaceflight engineering, astronautics |
| UFO | Unidentified Flying Object = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In English | → Spaceflight engineering, astronautics |
| UFO | Unknown Flying Object = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In English | → Spaceflight engineering, astronautics |
| UFO | Unidentifiziertes Flugobjekt = OVNI, НЛО, NIFO, עב"מ, NLO, NOL, OZN (look above) |
In German | → Spaceflight engineering, astronautics |