

Science and knowledge, organization, computer science, information, documentation, librarianship, institutions, publications.
| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| SydOP | Sydney Observatory Papers | In English | → Serial publications, periodicals → Astronomy | 
| SYGAL | SYstème de Gestion Automatisée des Loyers | In French | → Software → Accommodation | 
| SYGAL | SYstème de Gestion pour l'Alimentation | In French | → Software → Food technology | 
| SYGARD | SYstème de Gestion d'Accès au Réseau de Distribution | In French | → Software → Energy economics | 
| SYGMA | SYstème de Gestion de la MAintenance | In French | → Software → Maintenance and logistics | 
| SYLEN | SYstème de LEcture Nomade | In French | → Libraries | 
| SYLVIE | SYstème de Listage et de Ventilation d'Informations Élaborées | In French | → Software → Personnel management | 
| SYNAD | Syndicat National des Adjuvants pour Bétons et Mortier (www.synad.fr) | In French | → Organizations and associations → Civil engineering → Construction → France | 
| SYNALAF | Syndicat National des Labels Avicoles de France | In French | → Organizations and associations → Agricultural sciences → France | 
| SynMe | Synthetic Metals | In English | → Serial publications, periodicals → Chemistry → Metallurgy | 
| SYNPREFH | Syndicat National des Pharmaciens des Établissements Publics de Santé | In French | → Organizations and associations → Pharmacology, toxicology | 
| SYSFAC | SYstème de Surveillance de la FAtigue de la Chaudière | In French | → Software → Nuclear technology | 
| SYSIF | SYStème d'Information des Filiales | In French | → Knowledge management | 
| SyTec | Systems Technology | In English | → Serial publications, periodicals → Engineering, technology | 
| SYTRAL | SYndicat des TRansports en commun de l'Agglomération Lyonnaise (www.sytral.fr) | In French | → Organizations and associations → Transport and postal services → France | 
| T&D | Transportation and Docking | In English | → Maintenance and logistics → Transport and postal services | 
| T&E | Test and Evaluation | In English | → Quality management | 
| T&M | Time and Material | In English | → Quality management | 
| T&QA | Test and Quality Assurance | In English | → Quality management | 
| T-FA | Two-Factor Authentication | In English | → Software → Telecommunications | 
| T@GO | Vereniging voor Technisch Adviseurs & -Coördinators in het Gemeenschapsonderwijs | In Dutch | → Organizations and associations → Education | 
| TAAD | Texas Association of Appraisal Districts (www.taad.org) | In English | → Associations → 332 → United States | 
| TAAO | Texas Association of Assessing Officers (www.taao.org) | In English | → Associations → 332 → United States | 
| TAC | TVV Achilles Combinatie | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TAC | Tilburgse Amateur Club | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TAC | TAK Amar Deep Combinatie | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TAC | Traditional Anglican Communion | In English | → Organizations and associations → Protestant churches | 
| TAC | Tribune Anarchiste Communiste | In French | → Serial publications, periodicals → Anarchist organizations → Communist parties | 
| TACO | Test and Checkout | In English | → Quality management | 
| TACO | Test and Checkout Operations | In English | → Quality management | 
| TACS | Turkish American Cultural Society of New England (www.tacsne.org) | In English | → Organizations and associations → Civilization, culture, progress → United States | 
| TAdEN | Tutmonda Agado - Asocio de Esperantistaj Nefumantoj | In Esperanto | → Associations → Personal health and hygiene → Artificial languages (linguistics) | 
| TAEMm | Tokyo Metropolitan College Aeronautical Engineering Memoirs | In English | → Serial publications, periodicals → Aeronautics, aircraft | 
| TAGA | Technical Association of the Graphic Arts | In English | → Associations → Graphic industries, printing, publishing → Graphic arts | 
| TAGE | Tests d'Aptitude à la Gestion des Entreprises | In French | → Management → Economics → Education | 
| TAGU | Transactions of the American Geophysical Union | In English | → Serial publications, periodicals → Geophysics → United States | 
| TAIM | Traitement Automatique de l'Information Multimédia | In French | → Computer-based techniques | 
| TAIR | Test And Inspection Record | In English | → Records management | 
| TAIR | Test Assembly Inspection Record | In English | → Records management | 
| TAKE | Tutamerika Kongreso de Esperanto | In Esperanto | → Congresses → Artificial languages (linguistics) | 
| TAKE | Tutmonda Asocio de Konstruistoj Esperantistaj (http://take.esperanto.free.fr) | In Esperanto | → Associations → Construction → Artificial languages (linguistics) | 
| TALN | Traitement Automatique du Langage Naturel | In French | → Computer-based techniques → Linguistics | 
| TALNE | Traitement Automatique du Langage Naturel Écrit | In French | → Computer-based techniques → Linguistics | 
| TALNEO | Traitement Automatique de la Langue Naturelle Écrite et Orale | In French | → Computer-based techniques → Linguistics | 
| TALNO | Traitement Automatique du Langage Naturel Oral | In French | → Computer-based techniques → Linguistics | 
| TAMC | Tangent linear and Adjoint Model Compiler (www.autodiff.com/tamc/) | In English | → Computer simulation | 
| TamCo | Astronomical Contributions from the University of South Florida Tampa | In English | → Serial publications, periodicals → Astronomy → United States | 
| TAMNS | The Army Maintenance Management System | In English | → Maintenance and logistics → Military affairs | 
| TAMS | Transactions of the American Mathematical Society | In English | → Serial publications, periodicals → Mathematics → United States | 
| TAO | Traduction Automatique par Ordinateur | In French | → Translation → Computer science | 
| TAP | Telemetry Acceptance Pattern | In English | → Quality management → Geodesy, cartography | 
| TAPhA | Transactions and Proceedings of the American Philological Association | In English | → Serial publications, periodicals → Philology → United States | 
| TApPh | Topics in Applied Physics | In English | → Serial publications, periodicals → Physics | 
| TAPPI | Technical Association of Pulp and Paper Industry | In English | → Associations → Paper and board industry | 
| TAPS | Transactions of the American Philosophical Society | In English | → Serial publications, periodicals → Philosophy, psychology → United States | 
| TAR | Tot Achilles' Roem | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TARA | Torrance Amateur Radio Association | In English | → Associations → Telecommunications | 
| TARG | Téléchargement des Applications Réseau Gaz | In French | → Computer science → Energy economics | 
| TASA | The Australian Sociological Association (www.tasa.org.au) | In English | → Associations → Sociology → Australia | 
| TASC | Tecnologie Avanzate e nanoSCienza | In Italian | → Research institutes → Materials science → 6203 → Italia | 
| TASMA | Two Meter Area Spectrum Management Association (www.tasma.org) | In English | → Associations → Telecommunications | 
| TASPR | TEchnical and Schedule Performance Report | In English | → Quality management | 
| TAUCHI | Tampere Unit for Computer-Human Interaction (http://https://research.uta.fi/tauchi/) | In English | → Research institutes → Human-computer interaction → Finland | 
| TAUS | Translation Automation User Society (www.translationautomation.com) | In English | → Organizations and associations → Computer-based techniques → Translation → Linguistics | 
| TAVERNS | Test And Verification Environment for Remotely Networked Systems | In English | → Networks, communication | 
| TAVV | Ter Aarse Voetbal Vereniging | In Dutch | → Organizations and associations → Football and rugby | 
| TBAALAS | Texas Branch - American Association for Laboratory Animal Science (www.tbaalas.org) | In English | → Associations → Medicine → Veterinary medicine → United States | 
| TBBM | Techniques of Biochemical and Biophysical Morphology | In English | → Serial publications, periodicals → Biochemistry, biophysics | 
| TBD | Türkiye Bilişim Derneği (https://www.tbd.org.tr) | In Turkish | → Associations → Computer science → Turkey | 
| TBM | Time-Based Management | In French | → Management | 
| TBV | Türkiye Bilişim Vakfı (www.tbv.org.tr) | In Turkish | → Foundations → Computer science → Turkey | 
| TC | Trusted Computing | In English | → Computer science | 
| TCAO | Traitement de Corpus Assisté par Ordinateur | In French | → Computer-based techniques → Language, linguistics, literature | 
| TCD | Test Control Document | In English | → Quality management | 
| TCE | Translation Control Entry | In English | → Software → Memories | 
| TCIP | Technical Control Improvement Program | In English | → Maintenance and logistics | 
| TCL | Transaction Control language = LCT | Langage de Contrôle des Transactions | In French | In English | → Programming languages → Data | 
| TCM | Total Content Management | In English | → Document processing → Knowledge management | 
| TCM | Technical Control Management | In English | → Management | 
| TCM | Technical Coordination Meeting | In English | → Management | 
| TCO | Tomographie par Cohérence Optique | In French | → Diagnostics → Image processing → Optics | 
| TCO | Tjänstemännens Centralorganisation | In Swedish | → Organizations and associations → Labour, labour economics | 
| TCP | Transmission Control Protocol | In English | → Internet | 
| TCP/IP | Transmission Control Protocol/Internet Protocol | In English | → Internet | 
| TCPh | Topics in Current Physics | In English | → Serial publications, periodicals → Physics | 
| TCRS | Training and Certification Records System | In English | → Records management → Education → Labour, labour economics | 
| TCSC | Trainer Control and Simulation Computer | In English | → Computer hardware | 
| TD | Tidskrift för Dokumentation | In Swedish | → Serial publications, periodicals → Libraries | 
| TDA | Toullec Dancoing Associés | In French | → Software | 
| TDA | Thailand Diving Association | In English | → Associations → Sport, physical exercises | 
| TDA | Tetrault Design Associates | In English | → Internet | 
| TDA | TAUS Data Association | In English | → Associations → Computer-based techniques → Linguistics | 
| TDA | Transition Data Analysis | In English | → Software → Mathematics → Statistics | 
| TDAP | Transformations and Discourse Analysis Project | In English | → Computer-based techniques → Linguistics | 
| TDAPR | Telecommunications and Data Acquisition Progress Report | In English | → Serial publications, periodicals → Data → Telecommunications | 
| TDC | TRH Dindua Combinatie | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TDEA | Triple Data Encryption Algorithm | In English | → Algorithms → Computer science | 
| TDF | Telemetry Data File | In English | → Files → Geodesy, cartography | 
| TDM | Tomodensitométrie | In French | → Image processing → Diagnostics | 
| TDM | Time Division Multiplexing | In English | → Data → Networks, communication | 
| TDMS | Terminal Data Management System | In English | → Data | 
| TDNN | Time-Delay Neural Net | In English | → Artificial intelligence | 
| TDNT | Theological Dictionary of the New Testament | In English | → Encyclopaedias, reference works → Religion, theology | 
| TDO | Training Doet Overwinnen | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TDP | Tracking Data Processor | In English | → Computer hardware → Data | 
| TDSP | Time-Dependent Signal Processor | In English | → Computer hardware | 
| TDU | Time Display Unit | In English | → Human-computer interaction | 
| TDW | Trainen Doet Winnen | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TE | Travail Étranger | In French | → Organizations and associations → Labour, labour economics → History | 
| TEAM | Test Européen d'Aptitude au Management | In French | → Management → Education | 
| TEBE | Türk Eskiçağ Bilimleri Enstitüsü (http://http://turkinst.org) | In Turkish | → Organizations and associations → Archeology → Turkey | 
| TEC | Training Enterprise Council | In English | → Organizations and associations → Education | 
| TEC | Tielse Eendracht Combinatie | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TecN | Technical News | In English | → Serial publications, periodicals → Applied sciences, technology | 
| TecRv | Technology Review | In English | → Serial publications, periodicals → Astronomy | 
| Tecto | Tectonics | In English | → Serial publications, periodicals → Seismology, earthquakes | 
| Tectp | Tectonophysics | In English | → Serial publications, periodicals → Geophysics | 
| TeCu | Technology and Culture | In English | → Serial publications, periodicals → Astronomy → Civilization, culture, progress | 
| TEDO | Techniek en Enthousiasme Doet Overwinnen | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TEF | Tuluzaj Esperantistaj Fervojistoj | In Esperanto | → Organizations and associations → Transport and postal services → Artificial languages (linguistics) → France | 
| TEG | Technical Evaluation Group | In English | → Organizations and associations | 
| TEGV | Türkiye Eğitim Gönüllüleri Vakfı | In Turkish | → Foundations → Turkey | 
| TEI | Text Encoding Initiative | In English | → Data | 
| TEJA | Tutmonda Esperantista Ĵurnalista Asocio | In Esperanto | → Associations → Newspapers, journalism → Artificial languages (linguistics) | 
| TEJK | Tut-Eŭropa Junulara Konferenco | In Esperanto | → Organizations and associations | 
| TEJO | Tutmonda Esperanto Junulara Organizo (www.tejo.org) | In Esperanto | → Organizations and associations → Artificial languages (linguistics) | 
| TekEl | Tekhnicheskaia Elektrodinamika = TekEL | Технiчна електродинамiка | In Russian | In Russian | → Serial publications, periodicals → Electrical engineering | 
| TekEL | Технiчна електродинамiка = TekEl (look above) | In Russian | → Serial publications, periodicals → Electrical engineering | 
| TEL | Tutmonda Ekumena Ligo | In Esperanto | → Organizations and associations → Religion, theology | 
| TEL | Thèse en ligne | In French | → Libraries → Higher education, universities | 
| TelIn | Telematics Informatics | In English | → Serial publications, periodicals → Computer science → Telecommunications | 
| TELL | Turkish English Living Lexicon | In English | → Dictionaries → Linguistics | 
| TEMA | Türkiye Erozyonla Mücadele, Ağaçlandırma ve Doğal Varlıkları Koruma Vakfı (www.tema.org.tr) | In Turkish | → Foundations → 5023 → Forestry → Turkey | 
| TEMIS | Technopole Microtechniques et Scientifiques de Besançon (www.temis.org) | In French | → Research policy | 
| TEO | Tenpost En Omstreken | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TePhL | Technical Physics Letters | In English | → Serial publications, periodicals → Applied sciences, technology | 
| TER | Travail d'Études et de Recherche | In French | → Research policy → Education | 
| TerCo | Osservatorio Astronomico di Collurania Teramo - Contributi | In Italian | → Serial publications, periodicals → Astronomy | 
| TerMm | Osservatorio Astronomico di Collurania Teramo - Memorie ed Osservazioni | In Italian | → Serial publications, periodicals → Astronomy | 
| TERN | Teacher Education Research Network | In English | → Research policy → Education | 
| TerNC | Osservatorio Astronomico di Collurania Teramo - Note e Comunicazioni | In Italian | → Serial publications, periodicals → Astronomy | 
| TES | Transactions Électroniques Sécurisées | In French | → Networks, communication → Electronics → Telecommunications | 
| TEVA | Tutmonda Esperantista Vegetarana Asocio | In Esperanto | → Associations → Nutrition → Artificial languages (linguistics) | 
| TEVV | Tweede Exloërmondse Voetbal Vereniging | In Dutch | → Organizations and associations → Football and rugby | 
| TextMD | Technical Metadata for Text | In English | → Software → Documentation | 
| TFA | Tarptautinė Fonetinė Abėcėlė = AFI | Alfabetul Fonetic Internaţional | In Romanian = LFE | Lizherenneg Fonetikel Etrebroadel | In Breton = МФА | Международната фонетична азбука | In Bulgarian = IPA | Internationales Phonetisches Alphabet | In Tosk = AFI | Alfabet Fonètic Internacional | In Catalan = IFA | Internacia Fonetika Alfabeto | In Esperanto = IPA | International Phonetic Alphabet | In English = ΔΦΑ | Διεθνές Φωνητικό Αλφάβητο | In Greek = IPA | Internationales Phonetisches Alphabet | In German = API | Alphabet Phonétique International | In French = AFI | Alfabeto Fonético Internacional | In Spanish = AFI | Alfabeto Fonético Internacional | In Galician = NAF | Nazioarteko Alfabeto Fonetikoa | In Basque = IPA | Internationaalt Phonetescht Alphabet | In Letzeburgesh = AFI | Alfabeto Fonetico Internazionale | In Italian = МФА | Международный фонетический алфавит | In Russian = AFI | Alfabeto Fonético Internacional | In Portuguese = AFI | Alfabet Fonetic Internacionau | In Occitan = IFA | Internationoal Fonetisch Alfabet | In Vlaams = AFN | Alfabeti Fonetik Ndërkombëtar | In Albanian = IFA | Internasionale Fonetiese Alfabet | In Afrikaans = AFI | Alfabetu Fonéticu Internacional | In Asturian = ХГЬА | Халкъаздагьоркьосеб гьаркьазул алфавит | In Avaric = IPA | Internationals Phonetischs Alphabet | In Austro-Bavarian = ХАФӘ́ | Халыҡ-ара фонетик алфавит | BA = МФА | Міжнародны фанетычны алфавіт | In Belarusian = AFE | Alfabèt Fonètico Entèrnacionâl | In Franco-Provençal = YFA | Ynternasjonaal Fonetysk Alfabet | In Frisian = AIF | Aibítir Idirnáisiúnta Foghraíochta | In Irish = API | Alphabeto Phonetic International | In Interlingua = IPA | Internasional a Ponetiko nga Alpabeto | ILO = IFA | Internaciona Fonetik Alfabeto | In Ido = AFN | Alfabeya Fonetîk a Navneteweyî | In Kurdish = API | Abecedarium Phoneticum Internationale | In Latin = AFI | Alfabeta Fonetical Internasional | LFN = МФА | Меѓународна фонетска азбука | In Macedonian = AFA | Abjad Fonetik Antarabangsa | In Malay = AFI | Abc Fonético Anternacional | MWL = IPA | Internatschonal Phoneetsch Alphabet | In Low German = IFA | Internasjonale Fonetiske Alfabetet | In Norwegian = AFI | Alfabèt Fonétiko Internashonal | In Papiamento = IPA | Innernatiunaal Phoneddisch Alphebedd | PDC = EFA | Entanashunal Fonetikl Alfabet | In Pitcairn-Norfolk = MAF | Międzynarodowy Alfabet Fonetyczny | In Polish = AFI | Alfabet Fonétich Intërnassional | PMS = IPA | Internaitional Phonetic Alphabet | SCO = AFN | Alfabeti Fonetik Ndërkombëtar | SQ = МФА | Међународна фонетска абецеда | In Serbian = AFI | Alfabetu Fonétiku Internasionál | In Tetum = PPA | Pandaigdigang Ponetikong Alpabeto | In Tagalog = МФА | Міжнародний фонетичний алфавіт | In Ukrainian = LFB | Lafab Fonetik Bevünetik | VO | In Lithuanian | → Alphabetic writing systems → Phonetics, phonology | 
| TFC | Toulouse Football Club | In French | → Organizations and associations → Football and rugby | 
| TFS | Troch Freunship Sterk | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TGA | Techniques de Gestion Administrative | In French | → Management → Economics | 
| TGB | Türkye Gençler Birligi (http://https://tgb.gen.tr) | In Turkish | → Organizations and associations → Higher education, universities → Turkey | 
| TGG | The Goal Getters | In English | → Organizations and associations → Sport, physical exercises | 
| ThAFM | Theoretical and Applied Fracture Mechanics | In English | → Serial publications, periodicals → Mechanics → Mechanical engineering | 
| THAP | Thermal/Hydraulic Analyzer Digital Computer Program | In English | → Computer programs | 
| ThApC | Theoretical and Applied Climatology | In English | → Serial publications, periodicals → Meteorology, climatology | 
| ThAst | Theoretical Astrophysics | In English | → Serial publications, periodicals → Astronomy | 
| THB | The Haarlemse Boys | In English | → Organizations and associations → Sport, physical exercises | 
| ThCFD | Theoretical and Computational Fluid Dynamics | In English | → Serial publications, periodicals | 
| THCM | Total Human Centric Management | In English | → Management | 
| THE | Türk Hukuk Enstitüsü (www.the.org.tr) | In Turkish | → Organizations and associations → Law, jurisprudence → Turkey | 
| THEMIS | Technologies et Modélisation des Infrastructures des Systèmes Électriques | In French | → Electrical engineering → Computer simulation | 
| THG | Technical Harmonisation Group | In English | → Standardization → Engineering, technology | 
| ThLZ | Theologische Literaturzeitung | In German | → Serial publications, periodicals → Religion, theology → Literature | 
| THM | Table des Horaires aMénagés | In French | → Personnel management | 
| THOR | Tot Heil Onzer Ribbenkast | In Dutch | → Organizations and associations → Sport, physical exercises | 
| THOS | Tot Heil Onzer Spieren | In Dutch | → Organizations and associations → Sport, physical exercises | 
| THS | Tucson Herpetological Society (http://tucsonherpsociety.org) | In English | → Organizations and associations → Infectious diseases | 
| THT | The Hardball Times | In English | → Serial publications, periodicals → Sport, physical exercises | 
| TI | Tecnologia da Informação = IT | Information Technology | In English = IT | Informationstechnik | In German = IT | Inligtingstegnologie | In Afrikaans = TI | Tecnoloxías da información | In Galician = OT | Ohjelmistotekniikka | In Finnish = UT | Upplýsingatækni | In Icelandic = IT | Informationsteknik | In Swedish = IT | Informacijska Tehnologija | In Slovenian = IT | Informačné Technológie | In Slovak = ІТ | Інформаційні технології | In Ukrainian = ИТ | Информационные технологии | In Russian = IT | Informa Teknologio | In Esperanto = TI | Tecnologías de la Información | In Spanish = IT | Informacinės Technologijos | In Lithuanian = IT | Informācijas Tehnoloģijas | In Latvian | In Portuguese | → Computer science → Telecommunications | 
| TI | Tecnoloxías da información = IT, OT, UT, ІТ, ИТ (look above) | In Galician | → Computer science → Telecommunications | 
| TI | Tecnologías de la Información = IT, OT, UT, ІТ, ИТ (look above) | In Spanish | → Computer science → Telecommunications | 
| TIA | Terminologie et Intelligence Artificielle | In French | → Computer-based techniques → Linguistics | 
| TIA | Telecommunications Industry Association (www.tiaonline.org) | In English | → Associations → Telecommunications | 
| TIATA | Technical Information And Training Authoring | In English | → Documentation → Education | 
| TIB | Technische Informationsbibliothek | In German | → Libraries → Applied sciences, technology | 
| TIC | Tecnologías de la Información y la Comunicación = 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 = TMK | Teknologi Maklumat dan Komunikasi | In Malay = IKT | Informasjons- og kommunikasjonsteknologi | In Norwegian = TIC | Tecnologies de la Informació i la Comunicació | In Catalan = IKT | Informazio eta Komunikazio Teknologia | In Basque = TIC | Tecnologia dell'Informazione e della Comunicazione | In Italian = IKT | Informasjons- og kommunikasjonsteknologi | In Nynorsk | In Spanish | → Computer science → Telecommunications | 
| TIC | Technologies de l'Information et de la Communication = IKT, ICT, TMK (look above) | In French | → Computer science → Telecommunications | 
| TIC | Tecnologies de la Informació i la Comunicació = IKT, ICT, TMK (look above) | In Catalan | → Computer science → Telecommunications | 
| TIC | Tecnologia dell'Informazione e della Comunicazione = IKT, ICT, TMK (look above) | In Italian | → Computer science → Telecommunications | 
| TID | Tüm İnternet Derneği (www.tid.org.tr) | In Turkish | → Associations → Internet → Turkey | 
| TID | Telefónica Investigación y Desarrollo | In Spanish | → Networks, communication → Telecommunications | 
| TİDE | Türkiye İç Denetim Enstitüsü (http://https://tide.org.tr) | In Turkish | → Organizations and associations → Accounting → Turkey | 
| TİDER | Temel İhtiyaç Derneği (https://www.tider.org/) | In Turkish | → Associations → Social welfare → Turkey | 
| TIE | Toy Industries of Europe (www.tietoy.org) | In English | → Organizations and associations → Entertainment | 
| TIE | Transnationals Information Exchange | In English | → Organizations and associations → International relations | 
| TIFF | Tagged Image File Format | In English | → Files | 
| TIFS | Tennessee Institute for Flag Studies | In English | → Organizations and associations → Flags, banners | 
| TIL | Technology Insertion Laboratory | In English | → Research institutes | 
| TIM | Time-based Inductive Machine | In English | → Software | 
| TIMC | Transactions of the Institute of Measurement and Control | In English | → Serial publications, periodicals → Applied sciences, technology | 
| TIPHON | Telecommunications and Internet Protocol Harmonization Over Networks | In English | → Telecommunications → Internet | 
| TIPS | Theory of Inventive Problem Solving = TRIZ | Teorija Rešenija Izobretatel´skich Zadač | In Russian | In English | → Management → Engineering, technology | 
| TIR | Temporary Installation Record | In English | → Records management | 
| TIR | Total Item Record | In English | → Records management → Data | 
| TISI | Thai Industrial Standards Institute | In English | → Standardization | 
| TISI | Technologies de l'Information appliquées aux Systèmes Industriels | In French | → Computer-based techniques → Engineering, technology | 
| TISPAN | Telecoms & Internet converged Services & Protocols for Advanced Networks | In English | → Telecommunications → Internet | 
| TIUCS | Transactions of the International Union for Cooperation in Solar Research | In English | → Serial publications, periodicals → Astronomy | 
| TIW | Trainen Is Winnen | In Dutch | → Organizations and associations → Sport, physical exercises | 
| TIWG | Technical Interface Working Group | In English | → Human-computer interaction | 
| TJAu | Telecommunication Journal of Australia | In English | → Serial publications, periodicals → Telecommunications → Australia |