| SVD | Sport Vereniging de Del | In Dutch | → Sport, physical exercises |
| SVD | Sport Vereniging Driewegen | In Dutch | → Sport, physical exercises |
| SVDB | Sport Vereniging De Broekstreek | In Dutch | → Sport, physical exercises |
| SVDP | Sport Vereniging De Pionier | In Dutch | → Sport, physical exercises |
| SVDPW | Schiedamse Voetbalclub Door Plicht Winnen | In Dutch | → Football and rugby |
| SVDW | Sport Vereniging De Wrange | In Dutch | → Sport, physical exercises |
| SVE | Sport Vereniging Einighausen | In Dutch | → Sport, physical exercises |
| SVE | Société Volcanologique Européenne (www.sveurop.org) | In French | → 55121 |
| SVEB | Sport Vereniging Excelsior Brughusia | In Dutch | → Sport, physical exercises |
| SVF | Sport Vereniging Fortissimo | In Dutch | → Sport, physical exercises |
| SVG | Sportiviteit Vriendschap Gezelligheid | In Dutch | → Sport, physical exercises |
| SVGEB | Sport Vereniging Gemeentelijk Energie Bedrijf | In Dutch | → Sport, physical exercises |
| SVGG | Sport Vereniging Gideons Garde | In Dutch | → Sport, physical exercises |
| SVGT | Sport Vereniging Gemeente Tram | In Dutch | → Sport, physical exercises |
| SVH | Sport Vereniging Herkenbosch | In Dutch | → Sport, physical exercises |
| SVH | Sport Vereniging Hertogstad | In Dutch | → Sport, physical exercises |
| SVH | Sport Vereniging Hoogersmilde | In Dutch | → Sport, physical exercises |
| SVH | Sport Vereniging Halfweg | In Dutch | → Sport, physical exercises |
| SVH | Syndicaat van Vlaamse Huisartsen | In Dutch | → Medicine |
| SVHA | Sport Vereniging Herveld Andelst | In Dutch | → Sport, physical exercises |
| SVHR | Sport Vereniging Hercules Reuver | In Dutch | → Sport, physical exercises |
| SVI | Sport Vereniging Ittersum | In Dutch | → Sport, physical exercises |
| SVI | Středisko Vexilologcký Informací | In Czech | → 9299 |
| SVI | Servizio Volontario Internazionale | In Italian | |
| SVIA | Schweizerischer Verein für Informatik in der Ausbildung = SSIE | Société Suisse pour l'Informatique dans l'Enseignement | In French = SSII | Società Svizzera per l'Informatica nell'Insegnamento | In Italian |
In German | → Computer science → Education |
| SVK | Sport Vereniging Kaalheide | In Dutch | → Sport, physical exercises |
| SVL | Sport Vereniging Langbroek | In Dutch | → Sport, physical exercises |
| SVLV | Sport Vereniging Laurentius Voorschoten | In Dutch | → Sport, physical exercises |
| SVM | Sport Vereniging Munstergeleen | In Dutch | → Sport, physical exercises |
| SVM | Sport Vereniging Maartensdijk | In Dutch | → Sport, physical exercises |
| SVME | Sport Vereniging Mariadorp Eijsden | In Dutch | → Sport, physical exercises |
| SVMH | Sport Vereniging Molen Horne | In Dutch | → Sport, physical exercises |
| SVMM | Sport Vereniging Maarn Maarsbergen | In Dutch | → Sport, physical exercises |
| SVMS | Société Vaudoise des Maîtres Secondaires | In French | → Education |
| SVN | Sport Vereniging Nieuwenhagen | In Dutch | → Sport, physical exercises |
| SVN | Sport Vereniging Nijeveen | In Dutch | → Sport, physical exercises |
| SVO | Sport Vereniging Ooij | In Dutch | → Sport, physical exercises |
| SVO | Société Vexillologique de l'Ouest | In French | → 9299 |
| SVOC | Sport Vereniging Oirlo Castenray | In Dutch | → Sport, physical exercises |
| SVOW | Sport Verenging Oude Wetering | In Dutch | → Sport, physical exercises |
| SVP | Sport Vereniging Panter | In Dutch | → Sport, physical exercises |
| SVP | Sport Vereniging Peize | In Dutch | → Sport, physical exercises |
| SVPTT | Sport Vereniging Post Telegraaf Telefoon | In Dutch | → Sport, physical exercises |
| SVR | Sport Vereniging Ritthem | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereniging Sphinx | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereeniging Schalkwijk | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereniging Suëstra | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereniging Spijk | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereniging Stevensbeek | In Dutch | → Sport, physical exercises |
| SVS | Sport Vereniging Schollevaar | In Dutch | → Sport, physical exercises |
| SVS | Société des Vétérinaires Suisses = GST | Gesellschaft Schweizerischer Tierärztinnen und Tierärzte | In German |
In French | → Veterinary medicine |
| SVSH | Sport Vereniging Someren Heide | In Dutch | → Sport, physical exercises |
| SVSOS | Sport Vereniging Samenspel Overwint Steeds | In Dutch | → Sport, physical exercises |
| SVSSS | Sport Vereniging Sport Staalt Spieren | In Dutch | → Sport, physical exercises |
| SVV | Sport Vereniging Voorwaarts | In Dutch | → Sport, physical exercises |
| SVV | Schiedamse Voetbal Vereniging | In Dutch | → Football and rugby |
| SVV | Schoonebeekse Voetbal Vereniging | In Dutch | → Football and rugby |
| SVV | Surinaamse Voetbal Vereniging | In Dutch | → Football and rugby |
| SVV | Sibculose Voetbal Vereniging | In Dutch | → Football and rugby |
| SVVH | Sport en Voetbal Vereniging Heibloem | In Dutch | → Sport, physical exercises → Football and rugby |
| SVVM | Sport Vereniging Victoria Maasniel | In Dutch | → Sport, physical exercises |
| SVVN | Sport en Voetbal Vereniging Nijverdal | In Dutch | → Sport, physical exercises → Football and rugby |
| SVVU | Sport en Voetbal Vereniging Utrecht | In Dutch | → Sport, physical exercises → Football and rugby |
| SVW | Steeds Voor Waarts | In Dutch | → Sport, physical exercises |
| SVW | Steeds Voorwaarts Wilhelmina | In Dutch | → Sport, physical exercises |
| SVW | Sport Vereniging Willebrord | In Dutch | → Sport, physical exercises |
| SVZ | Sport Vereniging Zeijen | In Dutch | → Sport, physical exercises |
| SVZW | Sport Vereniging Zwaluwen Wierden | In Dutch | → Sport, physical exercises |
| SWCAS | Southwest Conference of the Association for Asian Studies | In English | → Associations → Language, linguistics, literature → Geography, biography, history |
| SWHG | Social Welfare History Group | In English | → Social welfare → History |
| SWOV | Stichting Wetenschappelijk Onderzoek Verkeersveilgheid | In Dutch | → Foundations → Transport and postal services |
| SWSF | Semantic Web Science Foundation | In English | → Foundations → Software → Networks, communication → Language, linguistics, literature |
| SWSWA | South West Song Writers Association | In English | → Associations → Music |
| SY | Suomen Yrittäjät | In Finnish | → Economic policy |
| SYNAD | Syndicat National des Adjuvants pour Bétons et Mortier (www.synad.fr) | In French | → Civil engineering → Building |
| SYNALAF | Syndicat National des Labels Avicoles de France | In French | → Agricultural sciences |
| SYNPREFH | Syndicat National des Pharmaciens des Établissements Publics de Santé | In French | → Pharmacology, toxicology |
| SYTRAL | SYndicat des TRansports en commun de l’Agglomération Lyonnaise | In French | → Transport and postal services |
| TAAD | Texas Association of Appraisal Districts (www.taad.org) | In English | → Associations → 332 |
| TAAO | Texas Association of Assessing Officers (www.taao.org) | In English | → Associations → 332 |
| TAC | TVV Achilles Combinatie | In Dutch | → Sport, physical exercises |
| TAC | Tilburgse Amateur Club | In Dutch | → Sport, physical exercises |
| TAC | TAK Amar Deep Combinatie | In Dutch | → Sport, physical exercises |
| TACS | Turkish American Cultural Society of New England (www.tacsne.org) | In English | → Civilization, culture, progress |
| TAdEN | Tutmonda Agado - Asocio de Esperantistaj Nefumantoj | In Esperanto | → Associations → Personal health and hygiene |
| TAGA | Technical Association of the Graphic Arts | In English | → Associations → Graphic industries, printing, publishing → Graphic arts |
| TAKE | Tutmonda Asocio de Konstruistoj Esperantistaj (http://take.esperanto.free.fr) | In Esperanto | → Associations → Building |
| TAPPI | Technical Association of Pulp and Paper Industry | In English | → Associations → Paper and board industry |
| TAR | Tot Achilles' Roem | In Dutch | → Sport, physical exercises |
| TASA | The Australian Sociological Association | In English | → Associations → Sociology |
| TAVV | Ter Aarse Voetbal Vereniging | In Dutch | → Football and rugby |
| TBAALAS | Texas Branch American Association for Laboratory Animal Science (www.tbaalas.org) | In English | → Associations → Medicine → Veterinary medicine |
| TBD | Türkiye Bilişim Derneği | In Turkish | |
| TBV | Türkiye Bilişim Vakfı | In Turkish | → Foundations |
| TCO | Tjänstemännens Centralorganisation | In Swedish | → Labour, labour economics |
| TDC | TRH Dindua Combinatie | In Dutch | → Sport, physical exercises |
| TDO | Training Doet Overwinnen | In Dutch | → Sport, physical exercises |
| TDW | Trainen Doet Winnen | In Dutch | → Sport, physical exercises |
| TE | Travail Étranger | In French | → Labour, labour economics → History |
| TEC | Tielse Eendracht Combinatie | In Dutch | → Sport, physical exercises |
| TEDO | Techniek en Enthousiasme Doet Overwinnen | In Dutch | → Sport, physical exercises |
| TEF | Tuluzaj Esperantistaj Fervojistoj | In Esperanto | → Transport and postal services |
| TEG | Technical Evaluation Group | In English | |
| TEGV | Türkiye Eğitim Gönüllüleri Vakfı | In Turkish | → Foundations |
| TEJA | Tutmonda Esperantista Ĵurnalista Asocio | In Esperanto | → Associations → Newspapers, journalism |
| TEJK | Tut-Eŭropa Junulara Konferenco | In Esperanto | |
| TEJO | Tutmonda Esperanto Junulara Organizo (www.tejo.org) | In Esperanto | |
| TEL | Tutmonda Ekumena Ligo | In Esperanto | → Religion, theology |
| TEMA | Türkiye Erozyonla Mücadele, Ağaçlandırma ve Doğal Varlıkları Koruma Vakfı (www.tema.org.tr) | In Turkish | → Foundations → Nature and society → Forestry |
| TEO | Tenpost En Omstreken | In Dutch | → Sport, physical exercises |
| TEVA | Tutmonda Esperantista Vegetarana Asocio | In Esperanto | → Associations → Nutrition |
| TEVV | Tweede Exloërmondse Voetbal Vereniging | In Dutch | → Football and rugby |
| TFS | Troch Freunship Sterk | In Dutch | → Sport, physical exercises |
| TGB | Türkye Gençler Birligi | In Turkish | → Sport, physical exercises |
| TGG | The Goal Getters | In English | → Sport, physical exercises |
| THB | The Haarlemse Boys | In English | → Sport, physical exercises |
| THOR | Tot Heil Onzer Ribbenkast | In Dutch | → Sport, physical exercises |
| THOS | Tot Heil Onzer Spieren | In Dutch | → Sport, physical exercises |
| THS | Tucson Herpetological Society (http://tucsonherpsociety.org) | In English | → Infectious diseases |
| TIE | Toy Industries of Europe (www.tietoy.org) | In English | → Entertainment |
| TIE | Transnationals Information Exchange | In English | → International relations |
| TIL | Technology Insertion Laboratory | In English | → Research institutes |
| TIW | Trainen Is Winnen | In Dutch | → Sport, physical exercises |
| TK | Tehnilised Komiteed | In Estonian | → Engineering, technology |
| TKA | Turkse Kracht Apeldoorn | In Dutch | → Sport, physical exercises |
| TKMS | Thurgauische Konferenz der Mittelschullehrkräfte | In German | → Education |
| TLL | Temasek Life Sciences Laboratory | In English | → Research institutes → Biological sciences → Biotechnology → Medicine |
| TLO | Technology Licensing Organization | In English | → Engineering, technology |
| TMMSN | Texas Marine Mammal Stranding Network (www.tmmsn.org) | In English | → Mammals |
| TN | Terra Nuova | In Italian | |
| TNS | The Naturist Society (www.naturistsociety.com) | In English | |
| TOB | Trouw Ons Beginsel | In Dutch | → Sport, physical exercises |
| TOG | Tot Ons Genoegen | In Dutch | → Sport, physical exercises |
| TOGB | Tot Ons Genoegen Berkel | In Dutch | → Sport, physical exercises |
| TOGO | Tot Ons Genoegen Opgericht | In Dutch | → Sport, physical exercises |
| TOGR | Tot Ons Genoegen Rotterdam | In Dutch | → Sport, physical exercises |
| TOK | Tarptautinis olimpinis komitetas (www.olympic.org) = CIO | Comité International Olympique | In French = IOC | International Olympic Committee | In English = МОК | Международен олимпийски комитет | In Bulgarian = MOO | Međunarodni olimpijski odbor | In Bosnian = COI | Comitè Olímpic Internacional | In Catalan = MOV | Mezinárodní olympijský výbor | In Czech = IOK | Internationales Olympisches Komitee | In German = ΔΟΕ | Διεθνής Ολυμπιακή Επιτροπή | In Greek = IOK | Internacia Olimpika Komitato | In Esperanto = COI | Comité Olímpico Internacional | In Spanish = ROK | Rahvusvaheline Olümpiakomitee | In Estonian = KOK | Kansainvälinen olympiakomitea | In Finnish = COI | Comité Olímpico Internacional | In Galician = MOO | Međunarodni olimpijski odbor | In Croatian = NOB | Nemzetközi Olimpiai Bizottság | In Hungarian = IOC | Internationaal Olympisch Comité | In Dutch = IOK | (Den) internasjonale olympiske komité | In Norwegian = MKOI | Międzynarodowy Komitet Olimpijski | In Polish = COI | Comité Olímpico Internacional | In Portuguese = МОК | Международный олимпийский комитет | In Russian = MOK | Međunarodni olimpijski komitet | In Serbo-Croatian = MOV | Medzinárodný olympijský výbor | In Slovak = MOK | Mednarodni olimpijski komite | In Slovenian = МОК | Међународни олимпијски комитет | In Serbian = IOK | Internationella Olympiska Kommitté | In Swedish = МОК | Міжнародний олімпійський комітет | In Ukrainian |
In Lithuanian | → Sport, physical exercises |
| TOLE | Tutmonda Ortodoksa Ligo Esperantista | In Esperanto | → 271 |
| TONA | Touwfabrieken Ontspanning Na Arbeid | In Dutch | → Sport, physical exercises |
| TONC | Trekvogels Oost-Nijmegen Combinatie | In Dutch | → Sport, physical exercises |
| TONEGIDO | Tot Ons Nut En Genoegen Is Deze Opgericht | In Dutch | → Sport, physical exercises |
| TONEGO | Tot Ons Nut En Genoegen Opgericht | In Dutch | → Sport, physical exercises |
| TOP | Tot Ons Plezier | In Dutch | → Sport, physical exercises |
| TÖTIAD | Türk(iye) Örüntü Tanıma ve İmge Anlama Derneği | In Turkish | → Graphical processing → Image processing |
| TOV | Tot Ons Vermaak | In Dutch | → Sport, physical exercises |
| TPO | Tussen Puinhopen Opgericht | In Dutch | → Sport, physical exercises |
| TPO | Transcultural Psychosocial Organization | In English | → Psychology |
| TPO | Towarzystwo Przetwarzania Obrazów | In Polish | → Image processing |
| TPRECD | Türk Plastik Rekonstrüktif ve Estetik Cerrahi Derneği (www.tpcd.org.tr) | In Turkish | → Associations → Plastic surgery |
| TRH | The Rising Hope | In English | → Sport, physical exercises |
| TRL | Transport Research Laboratory | In English | → Research institutes → Transport and postal services |
| TRPRC | Tulane Regional Primate Research Center (www.tnprc.tulane.edu) | In English | → Research institutes → Primates |
| TSB | The Shell Boys | In English | → Sport, physical exercises |
| TSC | Tiglieja Steyl Combinatie | In Dutch | → Sport, physical exercises |
| TSC | Tavenu Sparta Combinatie | In Dutch | → Sport, physical exercises |
| TSE | Türk Standardları Enstitüsü | In Turkish | → Standardization |
| TSI | Tuberous Sclerosis International | In English | → Neurology |
| TSIV | Tubereuze Sclerosis in Vlaanderen | In Dutch | → Neurology |
| TSOP | The Society for Organic Petrology (www.tsop.org) | In English | → Petrology |
| TSSG | Trondheimstudentenes Speidergruppe | In Norwegian | → Higher education, universities |
| TSV | Tegelsche Sport Vereeniging | In Dutch | → Sport, physical exercises |
| TTBS | Timber Trades’ Benevolent Society | In English | → Timber and woodworking industry |
| TTBS | Thames Traditional Boat Society | In English | → 6295 |
| TTBS | Trinidad and Tobago Bureau of Standards | In English | → Standardization |
| TTT | Teatro Trupo de Tuluzo | In Esperanto | → Theatre |
| TU | Toimihenkilöunioni | In Finnish | → Labour, labour economics |
| TUAG | Telecommunication Users Advisory Group | In English | → Telecommunications |
| TÜBİSAD | Türkiye Bilgi İşlem Hizmetleri Derneği (www.tubisad.org.tr) | In Turkish | → Associations → Computer science |
| TÜBİSAD | Türkiye Bilişim Sanayicileri ve İşadamları Derneği | In Turkish | |
| TUC | Trades Union Congress | In English | → Labour, labour economics |
| TULP | Tot Ut Lest Paraat | In Dutch | → Sport, physical exercises |
| TÜSİAD | Türk Sanayicileri ve İşadamları Derneği | In Turkish | |
| TVC | Tubbergense Voetbal Club | In Dutch | → Football and rugby |
| TVC | Tarsisius Voetbal Club | In Dutch | → Football and rugby |
| TVMA | Texas Veterinary Medical Association (www.tvma.org) | In English | → Associations → Veterinary medicine |
| TVO | Tot Vriendschap Opgericht | In Dutch | → Sport, physical exercises |
| TVV | Turmac Voetbal Vereniging | In Dutch | → Football and rugby |
| TVV | Turkse Voetbal Vereniging | In Dutch | → Football and rugby |
| TVV | Tilburgsche Voetbal Vereeniging | In Dutch | → Football and rugby |
| TWM | Tuindorp Watergraafs Meer | In Dutch | → Sport, physical exercises |
| TWU | Transportation Workers Union of America | In English | → Labour, labour economics → Transport and postal services |
| TZB | The Zandvoort Boys | In English | → Sport, physical exercises |
| TZW | Technologiezentrum Wasser (www.tzw.de) | In German | → Research institutes → Environmental technology, water supply, waste management |
| UALE | Universala Artista Ligo de Esperantistoj | In Esperanto | → Arts |
| UAM | University Art Museum | In English | → Museums → Higher education, universities → Arts |
| UAPM | Uniunea Artiştilor Plastici din Republica Moldova | In Romanian | → Arts |
| UAW | United Auto Workers | In English | → Labour, labour economics → Automobile manufacturing |
| UBF | Union Bouddhiste de France | In French | → Buddhism |
| UCAP | Union de la Communauté Algérienne de Paris | In French | |
| UCBRP | Union pour la Coopération Bourgogne/Rhénanie-Palatinat | In French | → International relations |
| UCC | Uniform Code Council | In English | |
| UCCA | Unione Circoli Cinematografici Arci (www.ucca.it) | In Italian | → Cinema, movies |
| UCESG | Union du Corps Enseignant Secondaire Genevois | In French | → Education |
| UCI | Union Cycliste Internationale (www.uci.ch) | In French | → Sport, physical exercises |
| UCI | Union des Constructeurs Immobiliers | In French | → Building |
| UCM | Union de Classes Moyennes | In French | → Labour, labour economics |
| UCMF | Union des Compositeurs de Musiques de Films (www.ucmf.fr) | In French | → Music → Cinema, movies |
| UCODEP | Unity and Cooperation for Development of People | In English | → Development |
| UCPTE | Union pour la Coordination de la Production et du Transport d’Électricité | In French | → Electrical engineering |
| UCSEI | Ufficio Centrale Studenti Esteri in Italia | In Italian | → Higher education, universities |
|