| O | Oxígeno = O | Oxygène | In French = O | Suurstof | In Afrikaans = O | Sauerstoff | ALS = O | أكسجين | In Arabic = O | Oxíxenu | In Asturian = O | Oksigen | In Azerbaijani = O | Sauastoff | BAR = O | Кісларод | In Belarusian = O | Кислород | In Bulgarian = O | অক্সিজেন | In Bengali = O | Oksigen | In Breton = O | Kiseonik | In Bosnian = O | Oxigen | In Catalan = O | Ossigenu | In Corsican = O | Kyslík | In Czech = O | Йӳçлĕк | In Chuvash = O | Ocsigen | In Welsh = O | Ilt | In Danish = O | Sauerstoff | In German = O | Οξυγόνο | In Greek = O | Oxygen | In English = O | Oksigeno | In Esperanto = O | Hapnik | In Estonian = O | Oxigeno | In Basque = O | اکسیژن | In Persian = O | Happi | In Finnish = O | Ossigjen | In Friulian = O | Soerstof | In Frisian = O | Ocsaigin | In Irish = O | Àile-beatha | GD = O | Osíxeno | In Galician = O | ઑક્સીજન | GU = O | Ocsygien | GV = O | חמצן | In Hebrew = O | आक्सीजन | In Hindi = O | Kisik | In Croatian = O | Kislik | HSB = O | Oksijèn | HT = O | Oxigén | In Hungarian = O | Թթվածին | In Armenian = O | Oxygeno | In Interlingua = O | Oksigen | In Indonesian = O | Oxo | In Ido = O | Súrefni | In Icelandic = O | Ossigeno | In Italian = O | 酸素 | In Japanese = O | kijno | JBO = O | Oksigen | JV = O | ჟანგბადი | In Georgian = O | ಆಮ್ಲಜನಕ | KN = O | 산소 | In Korean = O | Sauerstoff | KSH = O | Oksîjen | In Kurdish = O | Oxygenium | In Latin = O | Sauerstoff | In Letzeburgesh = O | Zuurstof | LI = O | Oksijɛ́ní | In Lingala = O | Deguonis | In Lithuanian = O | Skābeklis | In Latvian = O | Hāora | In Māori = O | Кислород | In Macedonian = O | ഓക്സിജന് | In Malayalam = O | Хүчилтөрөгч | In Mongolian = O | ऑक्सिजन | MR = O | Oksigen | In Malay = O | Ehēcayoh | En Nahuatl = O | Suerstoff | NDS = O | अक्सिजन | NEW = O | Zuurstof | In Dutch = O | Oksygen | In Nynorsk = O | Oksygen | In Norwegian = O | Oxygen | OM = O | Oxygen | PAM = O | Tlen | In Polish = O | Oxigénio | In Portuguese = O | Muksichaq | In Quechua = O | Oxigen | In Romanian = O | Кислород | In Russian = O | Ossìgginu | In Sicilian = O | Kiseonik | In Serbo-Croatian = O | ඔක්සිජන් | SI = O | Kyslík | In Slovak = O | Kisik | In Slovenian = O | Oksigjeni | SQ = O | Кисеоник | In Serbian = O | Oksigén | SU = O | Syre | In Swedish = O | Oksijeni | In Swahili = O | ஆக்ஸிஜன் | In Tamil = O | ఆక్సిజన్ | TE = O | Оксиген | In Tajik = O | ออกซิเจน | In Thai = O | Oksiheno | In Tagalog = O | Oksijen | In Turkish = O | Кисень | In Ukrainian = O | Kislorod | In Uzbek = O | Ôxy | In Vietnamese = O | זויערשטאף | In Yiddisch = O | 氧 | In Chinese |
In Spanish | → Chemistry |
| OAC | Observatorio Astronómico de Córdoba (www.oac.uncor.edu) | In Spanish | → Observatories |
| OCDE | Organización para la Cooperación y el Desarrollo Económico (www.oecd.org) = OECD | Organisation for Economic Cooperation and Development | In English = OCDE | Organisation de Coopération et de Développement Économique | In French = OCDE | Organizaţia de Cooperare şi Dezvoltare Economică | In Romanian = ΟΟΣΑ | Οργανισμός Οικονομικής Συνεργασίας και Ανάπτυξης | In Greek = OESO | Organisasie vir Ekonomiese Samewerking en Ontwikkeling | In Afrikaans = OCDE | Organització per a la Cooperació i el Desenvolupament Econòmic | In Catalan = ОИСР | Организация за икономическо сътрудничество и развитие | In Bulgarian = OECD | منظمة التعاون والتنمية الاقتصادية | In Arabic = OESO | Organisatie voor Economische Samenwerking en Ontwikkeling | In Dutch = OEKE | Organizaĵo pri Ekonomiaj Kunlaboro kaj Evoluigo | In Esperanto = KHEE | Kooperazio eta Hazkunde Ekonomikorako Erakundea | In Basque = OCDE | Organisation de cooperation e de developament economic | In Interlingue = OECD | 경제 협력 개발 기구 | In Korean = OECD | 経済協力開発機構 | In Japanese = OCSE | Organizzazione per la Cooperazione e lo Sviluppo Economico | In Italian = OECD | 经济合作与发展组织 | In Chinese = OECD | Tổ chức Hợp tác và Phát triển Kinh tế | In Vietnamese = OECD | องค์การเพื่อความร่วมมือทางเศรษฐกิจและการพัฒนา | In Thai = ОЭСР | Организация экономического сотрудничества и развития | In Russian = OCDE | Organização para a Cooperação e Desenvolvimento Económico | In Portuguese |
In Spanish | → International relations → International economic cooperation |
| ODM | Objetivos de Desarrollo del Milenio = OMD | Objectifs du Millénaire pour le Développement | In French = MDG | Millennium Development Goals | In German = OSM | Obiettivi di Sviluppo del Millennio | In Italian = TPM | Tujuan Pembangunan Milenium | In Indonesian = MDM | Metas de Desenvolvimento do Milênio | In Portuguese |
In Spanish | → United Nations → Development |
| ODUPA | Organización de Deporte Universitario Panamericano | In Spanish | → Organizations and associations → Higher education, universities → Sport, physical exercises |
| OEPM | Oficina Española de Patentes y Marcas (www.oepm.es) | In Spanish | → Industrial property → Artistic property |
| OIEA | Organismo Internacional de Energía Atómica (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 = סבא"א | הסוכנות הבינלאומית לאנרגיה אטומית | In Hebrew = IAEA | International Atomenergie Agence | In Letzeburgesh = AIEA | Agenzia Internazionale per l'Energia Atomica | In Italian = IAEA | अंतर्राष्ट्रीय परमाणु ऊर्जा अधिकरण | In Hindi = MAAE | Меѓународна агенција за атомска енергија | In Macedonian = МАГАТЭ | Международное агентство по атомной энергии | In Russian = AIEA | Agência Internacional de Energia Atómica | In Portuguese = MAEA | Międzynarodowa Agencja Energii Atomowej | In Polish = МАГАТЕ | Міжнародне агентство з атомної енергії | In Ukrainian = UAEA | Uluslararası Atom Enerji Ajansı | In Turkish = IAEA | สำนักงานพลังงานปรมาณูระหว่างประเทศ | In Thai = EANA | Energia Atomikoaren Nazioarteko Agentzia | In Basque |
In Spanish | → International relations → Energy economics → Nuclear technology |
| OIMT | Organización Internacional de las Maderas Tropicales (www.itto.or.jp) = OIBT | Organisation Internationale des Bois Tropicaux | In French = ITTO | International Tropical Timber Organization | In English |
In Spanish | → Organizations and associations → Nature and society → Timber and woodworking industry |
| OING | Organización Internacional No Gubernamental | In Spanish | → Organizations and associations |
| OLP | Organización para la Liberación de Palestina = PLO | Palestine Liberation Organization | In English = FAT | Fələstin Azadlıq Təşkilatı | In Azerbaijani = ООП | Организация за освобождение на Палестина | In Bulgarian = OAP | Organització per a l'Alliberament de Palestina | In Catalan = OOP | Organizace pro osvobození Palestiny | In Czech = OLP | Organisation de Libération de la Palestine | In French = PAE | Palestinaren Askapenerako Erakundea | In Basque = OLP | Organizaĵo por Liberigo de Palestino | In Esperanto = OLP | Organización para a Liberación da Palestina | In Galician = PLO | 팔레스타인 해방기구 | In Korean = OLP | Organização para a Libertação da Palestina | In Portuguese = OWP | Organizacja Wyzwolenia Palestyny | In Polish = PLO | パレスチナ解放機構 | In Japanese = ПЛО | Палестинската ослободителна организација | In Macedonian = PIO | Palestinos išsivadavimo organizacija | In Lithuanian = პგო | პალესტინის განთავისუფლების ორგანიზაცია | In Georgian = OLP | Organizzazione per la Liberazione della Palestina | In Italian = ООП | Организация освобождения Палестины | In Russian = ПЛО | Палестинска ослободилачка организација | In Serbian = PLO | 巴勒斯坦解放組織 | In Chinese = OВП | Організація визволення Палестини | In Ukrainian = FKÖ | Filistin Kurtuluş Örgütü | In Turkish |
In Spanish | → Political parties and movements |
| OMMI | Oblatas Misioneras de Maria Inmaculada = OMMI | Oblates Missionnaires de Marie Immaculée | In French = OMMI | Oblate Missionaries of Mary Immaculate | In English = OMMI | Oblate Missionarie di Maria Immacolata | In Italian |
In Spanish | → Roman catholic church |
| OMS | Organización Mundial de la Salud = 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 = MTO | Maailma Terviseorganisatsioon | In Estonian = MOE | Munduko Osasun Erakundea | In Basque = OMS | Organisacion mondiâla de la sandât | FRP = OMS | Organización Mundial da Saúde | In Galician = SZO | Svjetska zdravstvena organizacija | In Croatian = RTD | Rêxistina Tendurustiyê ya Dinyayê | In Kurdish = UMS | Urganizazziun mundiala da la Santaa | In Lombard = PSO | Pasaulio sveikatos organizacija | In Lithuanian = PVO | Pasaules veselības organizācija | In Latvian |
In Spanish | → United Nations → Medicine |
| OMSP | Organización Mundial de la Salud Pública | In Spanish | → Organizations and associations → International relations → Public health and hygiene |
| OMT | Organización Mundial del Turismo = OMT | Organisation Mondiale du Tourisme | In French = WTO | World Tourism Organization | In English = СТО | Светска туристичка организација | In Russian = OMT | Organização Mundial de Turismo | In Portuguese = OMT | Organizzazione Mondiale del Turismo | In Italian = OMT | Organizazion Mondiâl dal Turisim | In Friulian |
In Spanish | → United Nations → Tourism |
| ONA | Observatorio Nacional Argentino | In Spanish | → Observatories |
| ONG | Organización no gubernamental = ONGs | Organizações Não Governamentais | In Portuguese = NGO | Non-Governmental Organization | In English = NGO | Nichtregierungsorganisation | In German = ANG | Aozadur Nann-Gouarnamantel | In Breton = ONG | Organisation Non Gouvernementale | In French = NRO | Ne-Registara Organizo | In Esperanto = ONG | Organizzazione non governativa | In Italian = LSM | Lembaga Swadaya Masyarakat | In Indonesian = ONG | Organización non gobernamental | In Galician = GKE | Gobernuz Kanpoko Erakunde | In Basque = ΜΚΟ | Μη κυβερνητικές οργανώσεις | In Greek = NNO | Nevládní nezisková organizace | In Czech = ONG | Organització no governamental | In Catalan = ННО | Неурядові неприбуткові організації | In Ukrainian = ONG | Organização não governamental | In Portuguese = NGO | Niet-gouvernementele organisatie | In Dutch = NVO | Nevyriausybinė organizacija | In Lithuanian |
In Spanish | → Organizations and associations |
| ONU | Organización de las Naciones Unidas (www.un.org/spanish/) = UN | Unuigintaj Nacioj | In Esperanto = ONU | Organisation des Nations Unies | In French = ONU | Organizazión d'as Nazions Unitas | In Aragonese = ААН | Арганіза́цыя Аб'ядна́ных На́цый | In Belarusian = VN | Verenigde Nasies | In Afrikaans = ONU | Organización de les Naciones Uníes | In Asturian = OOH | Организацията на обединените нации | In Bulgarian = ABU | Aozadur ar Broadoù Unanet | In Breton = ПНО | Пĕрлешнĕ Нацисен Организацийĕ | In Chuvash = FN | Feriene Naasjes | In Frisian = UN | United Nations | In English = NBE | Nazio Batuen Erakundea | In Basque = ONU | Organización das Nacións Unidas | In Occitan = UN | Unuiĝinta Naciaro | In Esperanto = UN | Ujedinjeni Narodi | In Bosnian = CN | Consociatio Nationum | In Latin = FN | Forenede Nationer | In Danish = UN | Unionita Nacioni | In Ido = ONU | Organizzazione delle Nazioni Unite | In Italian = KU | Kenedhlow Unys | In Cornish = ONU | Organització de les Nacions Unides | In Catalan = ΟΗΕ | Οργανισμός Ηνωμένων Εθνών | In Greek = ΗΕ | Ηνωμένα Έθνη | In Greek = VN | Vereinte Nationen | In German = VN | Verenigde Naties | In Dutch = VN | Vereent Natiounen | In Letzeburgesh = ООН | Организация Oбъединённых Hаций | In Russian = ONU | Organisacion des Nacions unies | FRP = ONZ | Organizacja Narodów Zjednoczonych | In Polish = BMT | Birlashgan Millatlar Tashkiloti | In Uzbek = ООН | Організація Об'єднаних Націй | In Ukrainian = BM | Birleşmiş Milletler | In Turkish = LHiQ | Liên Hiệp Quốc | In Vietnamese = OKB | Organizata e Kombeve të Bashkuara | In Albanian = OSN | Organizácia Spojených národov | In Slovak = OZN | Organizacija Združenih Narodov | In Slovenian = УН | Уједињене нације | In Serbian = FN | Förenta nationerna | In Swedish = UM | Umoja wa Mataifa | In Swahili = NU | Nazzioni Uniti | In Sicilian = ONU | Organizaţia Naţiunilor Unite | In Romanian = ONU | Organização das Nações Unidas | In Portuguese = VN | Vereenten Natschonen | NDS = ST | Sameindu Tjóðir | In Faroese = HN | Huñusqa Nasyunkuna | In Quechua = PBB | Pertubuhan Bangsa-bangsa Bersatu | In Malay = NA | Náisiúin Aontaithe | In Irish = ÜRO | Ühinenud Rahvaste Organisatsioon | In Estonian = SÞ | Sameinuðu þjóðanna | In Icelandic |
In Spanish | → International relations → United Nations |
| OPEP | Organización de Países Exportadores de Petróleo = OPEC | Organization of the Petroleum Exporting Countries | In English = OPEP | Organisation des Pays Exportateurs de Pétrole | In French = OPEC | Organization of Petroleum Exporting Countries | In English = OPEL | Organizaĵo de Petrol-Eksportaj Landoj | In Esperanto = OPEP | Organização dos Países Exportadores de Petróleo | In Portuguese = OPEP | Organización de Países Esportadores de Petroleu | In Asturian = OPEP | Organització de Països Exportadors de Petroli | In Catalan = ОПЕК | Организација на земји извознички на нафта и нафтени деривати | In Macedonian |
In Spanish | → Organizations and associations → Mining → 665 |
| OPS | Organización Panamericana de la Salud (www.paho.org) = PAHO | Pan American Health Organization | In English = OPAS | Organização Pan-Americana da Saúde | In Portuguese |
In Spanish | → Organizations and associations → International relations → Medicine |
| OPTI | Observatorio de Prospectiva Tecnológica Industrial | In Spanish | → Engineering, technology |
| OT | Operación Triunfo | In Spanish | |
| OTAN | Organización del Tratado del Atlántico Norte (www.nato.int) = OTAN | Organització del Tractat de l'Atlàntic Nord | In Catalan = NATO | North Atlantic Treaty Organisation | In English = OTAN | Organizazión d'o Tratau de l'Atlantico Norte | In Aragonese = OTAN | Organización del Tratáu del Atlánticu Norte | In Asturian = AFNA | Aozadur Feur-emglev Norzh-Atlantel | In Breton = OTAN | Organisation du Traité de l'Atlantique Nord | In French = ন্যাটো | উত্তর আটলান্টিক নিরাপত্তা জোট | In Bengali = NATO | Οργανισμός Βορειοατλαντικού Συμφώνου | In Greek = NATO | Nordatlantikvertrag-Organisation | In German = NATO | Nord-Atlantika Traktat-Organizo | In Esperanto = NAFO | Noard-Atlantyske Ferdrachsorganisaasje | In Frisian = OTAN | Organización do Tratado do Atlántico Norte | In Galician = ნატო | ჩრდილოატლანტიკური თანამშრომლობის ორგანიზაცია | In Georgian = OTAN | Organização do Tratado do Atlântico Norte | In Portuguese = OTNA | Organizaciya le Tratatosko le Nordutne Atlantikosko | In Vlax Romani = OTAN | Organizaţia Tratatului Atlanticului de Nord | In Romanian = NATO | Organisatschoon vun den Noordatlantikverdrag | NDS |
In Spanish | → International relations |
| OVNI | Objeto Volador No Identificado = OVNI | Objet Volant Non Identifié | In French = OVNI | Objecte Volador No Identificat | In Catalan = НЛО | Неидентифициран летящ обект | In Bulgarian = UFO | Unidentifiziertes Flugobjekt | In German = 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 Spanish | → Spaceflight engineering, astronautics |
| P | Prolina = P | Proline | In English = P | প্রোলিন | In Bengali = P | Prolina | In Catalan = P | Prolin | In Danish = P | Prolin | In German = P | Prolino | In Esperanto = P | Proline | In French = P | 프롤린 | In Korean = P | Prolin | In Croatian = P | Prolin | In Indonesian = P | Prolina | In Italian = P | פרולין | In Hebrew = P | Prolīns | In Latvian = P | Prolin | In Letzeburgesh = P | Prolinas | In Lithuanian = P | Prolin | In Hungarian = P | Proline | In Dutch = P | プロリン | In Japanese = P | Prolina | In Polish = P | Prolina | In Portuguese = P | Пролин | In Russian = P | Proliini | In Finnish = P | Prolin | In Swedish = P | Prolin | In Turkish = P | Пролін | In Ukrainian = P | 脯氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| PARLACEN | Parlamento Centroamericano (www.parlacen.org.gt) | In Spanish | → International relations → Parliaments, representation |
| PASC | Programa de Alcance a la Sociedad Civil | In Spanish | |
| PCO | Partido Comunista de España | In Spanish | → Political parties and movements |
| PE | Parlamento Europeo (www.europarl.europa.eu) = EP | Eŭropa Parlamento | In Esperanto = EP | European Parliament | In English = EP | Europäisches Parlament | In German = ΕΚ | Ευρωπαϊκό Κοινοβούλιο | In Greek = EP | Evropský parlament | In Czech = PE | Parlament Europeu | In Catalan = ЕП | Европейски парламент | In Bulgarian = AP | Avropa Parlamenti | In Azerbaijani = PE | Parlement Européen | In French = EP | Europäescht Parlament | In Letzeburgesh = PE | Parlamento Europeo | In Italian = EP | Európai Parlament | In Hungarian = EP | Európsky parlament | In Slovak = PE | Parlamentul European | In Romanian = PE | Parlamento Europeu | In Portuguese = PE | Parlament Europejski | In Polish = EP | Europees Parlement | In Dutch |
In Spanish | → Parliaments, representation → European Union |
| PEMEX | Petróleos Mexicanos | In Spanish | → Mining → Chemical technology |
| PGUE | Presupuesto General de la Unión Europea | In Spanish | → International relations |
| PIMEC | Petita i Mitjana Empresa de Cataluña | In Spanish | → Organizations and associations → 33846 |
| PMA | Programa Mundial de Alimentos = PMA | Programa Mundial d'Alimentos | In Asturian = PAM | Programme Alimentaire Mondial | In French = WFP | World Food Programme | In English = WFP | 세계 식량 계획 | In Korean = WFP | მსოფლიო სასურსათო საბჭო | In Georgian = WFP | 国際連合世界食糧計画 | In Japanese = PAM | Programma Alimentare Mondiale | In Italian |
In Spanish | → United Nations → 6123 → Agricultural sciences |
| PNUD | Programa de las Naciones Unidas para el Desarrollo = PNUD | Programme des Nations Unies pour le Développement | In French = PNUD | Programa de les Naciones Uníes pa'l Desendolcu | In Asturian = PNUD | Programul Naţiunilor Unite pentru Dezvoltare | In Romanian = PUND | Programo de la Unuiĝintaj Nacioj pri Disvolvado | In Esperanto = UNDP | United Nations Development Programme | In English = PNUD | Programa de les Nacions Unides per al Desenvolupament | In Catalan = UNDP | გაეროს განვითარების პროგრამა | In Georgian = UNDP | জাতিসংঘ উন্নয়ন কর্মসূচী | In Bengali = PNUD | Programa das Nações Unidas para o Desenvolvimento | In Portuguese = ПРООН | Программа развития ООН | In Russian = UNDP | สำนักงานโครงการพัฒนาแห่งสหประชาชาติ | In Thai = UNDP | ஐக்கிய நாடுகள் வளர்ச்சித் திட்டம் | In Tamil = UNDP | 联合国开发计划署 | In Chinese |
In Spanish | → International relations → Development → United Nations |
| PNV | Partido Nacionalista Vasco (www.eaj-pnv.eu) = EAJ | Euzko Alderdi Jeltzalea | In Basque |
In Spanish | → Political parties and movements |
| PSOE | Partido Socialista Obrero Español | In Spanish | → Political parties and movements |
| PTU | Países y territorios de ultramar | In Spanish | → Geography |
| PUC | Pontificia Universidad Católica de Chile | In Spanish | → Higher education, universities → Roman catholic church |
| PUCE-SI | Pontificia Universidad Católica - Sede Ibarra | In Spanish | → Roman catholic church → Higher education, universities |
| PUCESD | Pontificia Universidad Católica del Ecuador - Santo Domingo | In Spanish | → Roman catholic church → Higher education, universities |
| Q | Glutamina = Q | Glutamine | In English = Q | Glutamina | In Catalan = Q | Glutamin | In Czech = Q | Glutamin | In German = Q | Glutamino | In Esperanto = Q | Glutamine | In French = Q | 글루타민 | In Korean = Q | Glutamin | In Indonesian = Q | Glutammina | In Italian = Q | גלוטמין | In Hebrew = Q | Glutamīns | In Latvian = Q | Glutamin | In Letzeburgesh = Q | Glutaminas | In Lithuanian = Q | Glutamine | In Dutch = Q | グルタミン | In Japanese = Q | Glutamina | In Polish = Q | Glutamina | In Portuguese = Q | Глутамин | In Russian = Q | Glutamín | In Slovak = Q | Глутамин | In Serbian = Q | Glutamiini | In Finnish = Q | Glutamin | In Swedish = Q | Glutamin | In Turkish = Q | Глутамін | In Ukrainian = Q | 穀氨醯胺 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| QFB | Químico Farmacobiología | In Spanish | → Biochemistry, biophysics → Pharmacology, toxicology |
| R | Arginina = R | Arginine | In English = R | Arginina | In Catalan = R | Arginin | In Czech = R | Arginin | In German = R | Arginino | In Esperanto = R | Arginine | In French = R | 아르기닌 | In Korean = R | Arginin | In Croatian = R | Arginin | In Indonesian = R | Arginina | In Italian = R | ארגינין | In Hebrew = R | Arginīns | In Latvian = R | Arginin | In Letzeburgesh = R | Argininas | In Lithuanian = R | Arginine | In Dutch = R | アルギニン | In Japanese = R | آرګېنين | In Pashto = R | Arginina | In Polish = R | Arginina | In Portuguese = R | Аргинин | In Russian = R | Arginín | In Slovak = R | Arginiini | In Finnish = R | Arginin | In Swedish = R | Arginin | In Turkish = R | Аргінін | In Ukrainian = R | 精氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| RAAP | Red Académica Peruana | In Spanish | → Computer science → Higher education, universities → Telecommunications |
| RAGIE | Red Avanzada Guatemalteca para la Investigación y Educación | In Spanish | → Computer science → Education → Mathematics and natural sciences → Telecommunications |
| RAICES | Red Avanzada de Investigación, Ciencia y Educación Salvadoreña | In Spanish | → Computer science → Education → Mathematics and natural sciences → Telecommunications |
| RAU | Red Académica Uruguaya | In Spanish | → Computer science → Higher education, universities → Telecommunications |
| RDA | República Democrática Alemana = GDR | Germana Demokratia Respubliko | In Esperanto = RDA | Republik Demokratel Alamagn | In Breton = RDA | République Démocratique Allemande | In French = DDR | Deutsche Demokratische Republik | In German = DDR | Duitse Demokratiese Republiek | In Afrikaans = NDR | Njemačka Demokratska Republika | In Bosnian = RDA | República Democràtica Alemanya | In Catalan = NDR | Německá demokratická republika | In Czech = ГДР | Германи Демократиллĕ Республики | In Chuvash = ΛΔΓ | Λαϊκή Δημοκρατία της Γερμανίας | In Greek = GDR | German Democratic Republic | In English = AED | Alemaniar Errepublika Demokratikoa | In Basque = NDK | Német Demokratikus Köztársaság | In Hungarian = RDT | Repubblica Democratica Tedesca | In Italian = DDR | Duitse Democratische Republiek | In Dutch = RDG | Republica Democrată Germană | In Romanian = DAC | Demokratik Alman Cumhuriyeti | In Turkish |
In Spanish | → Geography |
| REACCIUN | Red Académica de Centros de Investigación y Universidades Nacionales | In Spanish | → Computer science → Education → Telecommunications |
| RedCYT | Red Científica y Tecnológica | In Spanish | → Computer science → Mathematics and natural sciences → Applied sciences, technology → Telecommunications |
| RENATA | Red Nacional Académica de Tecnología Avanzada | In Spanish | → Computer science → Telecommunications |
| RENIA | Red Nicaragüense de Internet Avanzada | In Spanish | → Computer science → Telecommunications |
| REP | Revista Española del Pacífico | In Spanish | → Serial publications, periodicals → Area studies |
| RETINA | Red TeleInformática Académica | In Spanish | → Computer science → Telecommunications |
| REUNA | Red Universitaria Nacional | In Spanish | → Computer science → Higher education, universities → Telecommunications |
| RFSY | República Federal Socialista de Yugoslavia = СФРЈ | Социјалистичка Федеративна Република Југославија | In Macedonian = SFRY | Socialist Federal Republic of Yugoslavia | In Serbian = SFRJ | Socijalistička Federativna Republika Jugoslavija | In Serbo-Croatian = RFSY | République Fédérale Socialiste de Yougoslavie | In French = JEFS | Jugoslaviako Errepublika Federal Sozialista | In Basque = SFRJ | Sozialistische Föderative Republik Jugoslawien | In German = SFRJ | Socialistická federativní republika Jugoslávie | In Czech = RFSI | República Federal Socialista de Iugoslàvia | In Catalan = RSFJ | Repubblica Socialista Federale di Jugoslavia | In Italian = SFRJ | Socjalistyczna Federacyjna Republika Jugosławii | In Polish = RSFJ | República Socialista Federal da Iugoslávia | In Portuguese = RSFI | Republica Socialistă Federativă Iugoslavia | In Romanian = СФРЮ | Социалистическая Федеративная Республика Югославия | In Russian = SFRJ | Socialistična federativna republika Jugoslavija | In Slovenian |
In Spanish | → Geography → History |
| RMxAA | Revista Mexicana de Astronomía y Astrofísica | In Spanish | → Serial publications, periodicals → Astronomy |
| RMxF | Revista Mexicana de Física | In Spanish | → Serial publications, periodicals → Physics |
| RN | Renovación Nacional | In Spanish | → Political parties and movements |
| RNAO | Resultados del Observatorio Nacional Argentino | In Spanish | → Serial publications, periodicals → Astronomy |
| ROCor | Resultados del Observatorio Argentino de Córdoba | In Spanish | → Serial publications, periodicals → Astronomy |
| RTB | Red Telefónica Básica | In Spanish | → Telecommunications |
| RTC | Red Telefónica Conmutada | In Spanish | → Telecommunications |
| RTVE | Radiotelevisión Española (www.rtve.es) | In Spanish | → Telecommunications |
| RvCF | Revista Colombiana de Física | In Spanish | → Serial publications, periodicals → Physics |
| S | Serina = S | Serine | In English = S | سيرين | In Arabic = S | Serina | In Catalan = S | Serin | In Czech = S | Serin | In Danish = S | Serin | In German = S | Serino | In Esperanto = S | Sérine | In French = S | 세린 | In Korean = S | Serin | In Croatian = S | Serin | In Indonesian = S | Serina | In Italian = S | סרין | In Hebrew = S | Serīns | In Latvian = S | Serin | In Letzeburgesh = S | Serinas | In Lithuanian = S | Serine | In Dutch = S | セリン | In Japanese = S | Serin | In Norwegian = S | Seryna | In Polish = S | Serina | In Portuguese = S | Серин | In Russian = S | Seriini | In Finnish = S | Serin | In Swedish = S | செர்ரீன் | In Tamil = S | Serin | In Turkish = S | Серин | In Ukrainian = S | 絲氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| S | Azufre = S | Soufre | In French = S | Swawel | In Afrikaans = S | كبريت | In Arabic = S | Azufre | In Asturian = S | Kükürd | In Azerbaijani = S | Сера | In Belarusian = S | Сяра | In Bulgarian = S | গন্ধক | In Bengali = S | Sumpor | In Bosnian = S | Sofre | In Catalan = S | Zolfu | In Corsican = S | Síra | In Czech = S | Sylffwr | In Welsh = S | Svovl | In Danish = S | Schwefel | In German = S | Θείο | In Greek = S | Sulfur | In English = S | Sulfuro | In Esperanto = S | Väävel | In Estonian = S | Sufre | In Basque = S | گوگرد | In Persian = S | Rikki | In Finnish = S | Solfar | In Friulian = S | Xofre | In Galician = S | גופרית | In Hebrew = S | गन्धक | In Hindi = S | Sumpor | In Croatian = S | Souf | HT = S | Kén | In Hungarian = S | Ծծումբ | In Armenian = S | Belerang | In Indonesian = S | Sulfo | In Ido = S | Brennisteinn | In Icelandic = S | Zolfo | In Italian = S | 硫黄 | In Japanese = S | 황 | In Korean = S | Kibrît | In Kurdish = S | Schwiefel | In Letzeburgesh = S | Solfer | LI = S | Siera | In Lithuanian = S | Sērs | In Latvian = S | Pungatara | In Māori = S | Сулфур | In Macedonian = S | ഗന്ധകം | In Malayalam = S | Хүхэр | In Mongolian = S | सल्फर | MR = S | Swevel | NDS = S | Zwavel | In Dutch = S | Svovel | In Nynorsk = S | Svovel | In Norwegian = S | Sulfre | NOV = S | Sofre | In Occitan = S | Siarka | In Polish = S | Enxofre | In Portuguese = S | Salina | In Quechua = S | Sulf | In Romanian = S | Сера | In Russian = S | Surfi | In Sicilian = S | Sumpor | In Serbo-Croatian = S | Síra | In Slovak = S | Žveplo | In Slovenian = S | Squfuri | SQ = S | Сумпор | In Serbian = S | Walirang | SU = S | Svavel | In Swedish = S | Sulfuri | In Swahili = S | கந்தகம் | In Tamil = S | గంధకము | TE = S | กำมะถัน | In Thai = S | Kükürt | In Turkish = S | Сірка | In Ukrainian = S | Oltingugurt | In Uzbek = S | Lưu huỳnh | In Vietnamese = S | שװעבל | In Yiddisch = S | 硫 | In Chinese |
In Spanish | → Chemistry |
| SA | Sociedad Anónima = SA | Société Anonyme | In French = NV | Naamloze Vennootschap | In Dutch = SA | Sociedade Anónima | In Portuguese = ΑΕ | Ανώνυμη Εταιρεία | In Greek = AŞ | Anonim Şirket | In Turkish |
In Spanish | → Economics |
| SAPU | Servicio de Atención PriFa de Urgencia | In Spanish | → Medicine |
| Se | Selenio = Se | Sélénium | In French = Se | Selenium | In Afrikaans = Se | سيلينيوم | In Arabic = Se | Селен | In Belarusian = Se | Селен | In Bulgarian = Se | সেলেনিয়াম | In Bengali = Se | Selen | In Bosnian = Se | Seleni | In Catalan = Se | Seleniu | In Corsican = Se | Selen | In Czech = Se | Selen | In Danish = Se | Selen | In German = Se | Σελήνιο | In Greek = Se | Selenium | In English = Se | Seleno | In Esperanto = Se | Seleen | In Estonian = Se | سلنیوم | In Persian = Se | Seleeni | In Finnish = Se | Seleni | In Friulian = Se | Selenio | In Galician = Se | סלניום | In Hebrew = Se | सेलेनियम | In Hindi = Se | Selenij | In Croatian = Se | Selenyòm | HT = Se | Szelén | In Hungarian = Se | Սելեն | In Armenian = Se | Selenium | In Indonesian = Se | Selenio | In Ido = Se | Selen | In Icelandic = Se | Selenio | In Italian = Se | セレン | In Japanese = Se | lurcmu | JBO = Se | 셀레늄 | In Korean = Se | Selenium | In Latin = Se | Selen | In Letzeburgesh = Se | Selenas | In Lithuanian = Se | Selēns | In Latvian = Se | Селен | In Macedonian = Se | सेलेनियम | MR = Se | Selen | NDS = Se | Seleen | In Dutch = Se | Selen | In Nynorsk = Se | Selen | In Norwegian = Se | Selèni | In Occitan = Se | Selen | In Polish = Se | Selênio | In Portuguese = Se | Silinyu | In Quechua = Se | Seleniu | In Romanian = Se | Селен | In Russian = Se | Sileniu | In Sicilian = Se | Selen | In Serbo-Croatian = Se | Selén | In Serbian = Se | Selen | In Slovenian = Se | Селен | In Serbian = Se | Selen | In Swedish = Se | Seleni | In Swahili = Se | செலீனியம் | In Tamil = Se | ซีลีเนียม | In Thai = Se | Selenyum | In Turkish = Se | Селен | In Ukrainian = Se | Selen | In Uzbek = Se | 硒 | In Chinese |
In Spanish | → Chemistry |
| SEBC | Sistema Europeo de Bancos Centrales = SEBC | Système Européen de Banques Centrales | In French = ESCB | Europski sistem centralnih banaka | In Bosnian = SEBC | Sistema Europeu de Bancs Centrals | In Catalan = ESCB | Det Europæiske System af Centralbanker | In Danish = ESZB | Europäisches System der Zentralbanken | In German = ΕΣΚΤ | Ευρωπαϊκό Σύστημα Κεντρικών Τραπεζών | In Greek = ESCB | European System of Central Banks | In English = ESCB | Eŭropa Sistemo de Centraj Bankoj | In Esperanto = EKPS | Euroopa Keskpankade Süsteemi | In Estonian = KBER | Központi Bankok Európai Rendszere | In Hungarian = SEBC | Sistema Europeo delle Banche Centrali | In Italian = ESCB | Europees Stelsel van Centrale Banken | In Dutch = ESSB | Det europeiske systemet av sentralbanker | In Norwegian = ESBC | Europejski System Banków Centralnych | In Polish = SEBC | Sistema Europeu de Bancos Centrais | In Portuguese = ЄСЦБ | Європейська система центральних банків | In Ukrainian = ESCB | Európsky systém centrálnych bánk | In Slovak = ECBS | Europeiska centralbankssystemet | In Swedish |
In Spanish | → Banks → European Union |
| SECED | Servicio Central de Documentación | In Spanish | |
| SeCIU | Servicio Central de Informática Universitario | In Spanish | → Computer science → Higher education, universities |
| SECMCA | Secretaría Ejecutiva del Consejo Monetario Centroamericano (www.secmca.org) | In Spanish | → International economic cooperation |
| SEDIC | Sociedad Española de Documentación e Información Científica | In Spanish | → Libraries → Mathematics and natural sciences |
| SENACYT | Secretaría Nacional de Ciencia y Tecnología | In Spanish | → Public administration, government → Mathematics and natural sciences → Applied sciences, technology |
| SEPEX | Sociedad Española de Psicología Experimental (www.sepex.es) | In Spanish | → Organizations and associations → Psychology |
| SER | Sociedad Española de Radiodifusión | In Spanish | → Telecommunications |
| SG-SICA | Secretaría General del Sistema de la Integración Centroamericana (www.sgsica.org) | In Spanish | → International relations |
| SGBD | Sistema de gestión de base de datos = DBMS | Data Base Management System | In English = SGBD | Système de Gestion de Base de Données | In French = SŘBD | Systém řízení báze dat | In Czech = SGBD | Sistema de Gestió de Bases de Dades | In Catalan = SMBD | Sistem manajemen basis data | In Indonesian = SUBP | Sustav za upravljanje bazom podataka | In Croatian = DBKS | Datu-baseak kudeatzeko sistema | In Basque = DBMS | Datenbankmanagementsystem | In German |
In Spanish | → Data |
| SICA | Sistema de la Integración Centroamericana (www.sica.int) | In Spanish | → International relations |
| SIDA | Síndrome de Inmunodeficiencia Adquirida = 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 = SEIF | Siondróm Easpa Imdhíonachta Faighte | In Irish = AIDS | Annlochd Inneamh Dìon-Slàinte | GD = ՁԻԱՀ | Ձեռքբերովի Իմունային Անբավարվածության Համախտանիշ | In Armenian = SCDI | Syndromis Comparatis Defectu Immunitatis | In Latin = 에이즈 | 후천성 면역 결핍 증후군 | In Korean = შიდსი | შეძენილი იმუნური დეფიციტის სინდრომი | In Georgian = СИДА | Синдромот на стекнат имунолошки дефицит | In Macedonian = СИДА | синдром стеченог имунолошког дефицита | In Serbian = AIDS | Akvirírani imúnski deficítni sindróm | In Slovenian = СПИД | Синдром приобретённого иммунного дефицита | In Russian = SIDA | Sindromul Imunodeficienţei Autodobândite | In Romanian = UHCW | Unquy hark'aypa chaskisqa waqlliynin | In Quechua = SIDA | Síndrome da imunodeficiência adquirida | In Portuguese = AIDS | Hội chứng Suy giảm Miễn dịch Mắc phải | In Vietnamese = СНІД | Cиндром набутого імунодефіциту | In Ukrainian = AIDS | Alınğan İmmun Defisit Síndromı | In Tatar = UKIMWI | Upungufu wa Kinga Mwilini | In Swahili |
In Spanish | → Immunology and allergy → Infectious diseases |
| SIECA | Secretaría de Integración Económica Centroamericana (www.sieca.org.gt) | In Spanish | |
| SIG | Sistema de Información Geográfica = GIS | Geographic(al) Information System | In English = SIG | Sistema Informativo Geografico | In Italian = SIG | Sistema d'informació geogràfica | In Catalan = GIS | Geografický Informační Systém | In Czech = ГИС | Географска информационна система | In Bulgarian = ΓΣΠ | Γεωγραφικά Συστήματα Πληροφοριών | In Greek = GIS | Geographisches Informationssystem | In German = GIS | Geoinformationssystem | In German = GIS | Geoinfosüsteem | In Estonian = GIS | Geografski informacijski sustav | In Croatian = ממ"ג | מערכת מידע גאוגרפית | In Hebrew = GIS | Geografinė informacinė sistema | In Lithuanian = SIG | Sistem Informasi Geografis | In Indonesian = GIS | Geografisch Informatiesysteem | In Dutch = GIS | Geografiske informasjonssystem | In Nynorsk = GIS | Geografiske informasjonssystemer | In Norwegian = SIG | Sistema de informação geográfica | In Portuguese = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = GIS | Geografiskt InformationsSystem | In Swedish = ГІС | Геоінформаційна система | In Ukrainian |
In Spanish | → Software → Geography |
| SIM | Sistema Interamericano de Metrología | In Spanish | → Standardization |
| SLO | Dipartimento di Studi Linguistici e Orientali | In Spanish | → Linguistics → Area studies |
| SOC | Servei d'Ocupació de Catalunya | In Spanish | |
| SRE | Servicio Regional de Empleo | In Spanish | |
| SSAD | Servicio de Secuenciación Automática de DNA | In Spanish | → Genetics → Biotechnology |
| SSMS | Servicio de Salud Metropolitano Sur | In Spanish | → Medicine |
| STIB | Salón Textil Internacional de Barcelona | In Spanish | → Textile industry |
| STV | Solidaridad de Trabajadores Vascos = ELA | Euzko Langilleen Alkartasuna | In Basque |
In Spanish | → Organizations and associations → Labour, labour economics |
| SUH | Síndrome Urémico Hemolítico = HUS | Hemolytic Uremic Syndrome | In English = SHU | Syndrome Hémolytique et Urémique | In French = HUS | Hämolytisch-urämisches Syndrom | In German = HUS | Hemolytisk uremisk syndrom | In Nynorsk = HUS | Hemolytisk-uremisk syndrom | In Norwegian = ХУС | Хемолитички уремијски синдром | In Serbian = HÜS | Hemolitik üremik sendrom | In Turkish |
In Spanish | → Blood and circulatory system → Pathology |
| SUL | Secretariado Uruguayo de la Lana | In Spanish | |
| T | Treonina = T | Threonine | In English = T | Treonina | In Catalan = T | Threonin | In Czech = T | Threonin | In German = T | Treonino | In Esperanto = T | Thréonine | In French = T | 트레오닌 | In Korean = T | Treonin | In Indonesian = T | Treonina | In Italian = T | תראונין | In Hebrew = T | Treonīns | In Latvian = T | Threonin | In Letzeburgesh = T | Treoninas | In Lithuanian = T | Threonine | In Dutch = T | トレオニン | In Japanese = T | Treonina | In Polish = T | Treonina | In Portuguese = T | Треонин | In Russian = T | Treoniini | In Finnish = T | Treonin | In Swedish = T | Treonin | In Turkish = T | Треонін | In Ukrainian = T | 蘇氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| T | Timina = T | Thymine | In English = T | ثايمين | In Arabic = T | Timina | In Catalan = T | Thymin | In Czech = T | Thymin | In Danish = T | Thymin | In German = T | Θυμίνη | In Greek = T | Timino | In Esperanto = T | Timina | In Galician = T | Timina | In Italian = T | Thymine | In French = T | Timin | In Indonesian = T | תימין | In Hebrew = T | Timinas | In Lithuanian = T | Timin | In Hungarian = T | Thymine | In Dutch = T | チミン | In Japanese = T | Tymin | In Norwegian = T | Tymina | In Polish = T | Timina | In Portuguese = T | Тимин | In Russian = T | Timin | In Slovenian = T | Тимин | In Serbian = T | 胸腺嘧啶 | In Chinese = T | Тимін | In Ukrainian = T | Timin | In Turkish = T | Timin | In Serbo-Croatian = T | ไทมีน | In Thai = T | Tymiini | In Finnish = T | Tymin | In Swedish |
In Spanish | → Genetics → Biochemistry, biophysics |
| TCE | Tribunal de Cuentas Europeo | In Spanish | → International relations |
| TEDH | Tribunal Europeo de Derechos Humanos = ECHR | European Court of Human Rights | In English = CEDH | Cour Européenne des Droits de l'Homme | In French = ESLP | Evropský soud pro lidská práva | In Czech = EMD | Den Europæiske Menneskerettighedsdomstol | In Danish = EGMR | Europäischer Gerichtshof für Menschenrechte | In German = ΕΔΑΔ | Ευρωπαϊκό Δικαστήριο Ανθρωπίνων Δικαιωμάτων | In Greek = EIT | Euroopan ihmisoikeustuomioistuin | In Finnish = AİHM | Avrupa İnsan Hakları Mahkemesi | In Turkish = ЕСЉП | Европски суд за људска права | In Serbian = ЕСПЧ | Европейский Суд по правам человека | In Russian = CEDO | Curtea Europeană a Drepturilor Omului | In Romanian = ETPC | Europejski Trybunał Praw Człowieka | In Polish = EMD | Den europeiske menneskerettsdomstol | In Norwegian = EMD | Den europeiske menneskerettsdomstolen | In Nynorsk = EHRM | Europees Hof voor de Rechten van de Mens | In Dutch = EŽTT | Europos Žmogaus Teisių Teismas | In Lithuanian = CEDU | Corte Europea dei diritti dell'uomo | In Italian |
In Spanish | → International law → Fundamental rights |
| 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 |
In Spanish | → Computer science → Telecommunications |
| TID | Telefónica Investigación y Desarrollo | In Spanish | → Networks, communication → Telecommunications |
| TJCE | Tribunal de Justicia de las Comunidades Europeas = CJEC | Court of Justice of the European Communities | In English = CJCE | Cour de Justice des Communautés Européennes | In French = TJCE | Tribunal de Justícia de les Comunitats Europees | In Catalan = LICE | Llys Cyfiawnder Ewrop | In Welsh = ΔΕΚ | Δικαστήριο των Ευρωπαϊκών Κοινοτήτων | In Greek = EuGH | Europäischer Gerichtshof | In German = JKEK | Justica Kortumo de Eŭropaj Kortumoj | In Esperanto = CGCE | Corte di Giustizia delle Comunità Europee | In Italian = HvJEG | Hof van Justitie van de Europese Gemeenschappen | In Dutch = EBTT | Europos Bendrijų Teisingumo Teismas | In Lithuanian |
In Spanish | → Law, jurisprudence → European Union |
| TJUE | Tribunal de Justicia de la Unión Europea | In Spanish | → International relations |
| TLC | Tratado de Libre Comercio | In Spanish | → Trade |
| TMB | Transportes Metropolitanos de Barcelona | In Spanish | → Transport and postal services |
| TNT | Trinitrotolueno = TNT | Trinitrotoluol | In German = TNT | Trinitrotoluè | In Catalan = TNT | Trinitrotoluen | In Czech = TNT | Trinitrotoluene | In English = TNT | Trinitrotolueno | In Esperanto = 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 Spanish | → Chemicals → Military engineering |
| TPIR | Tribunal Penal Internacional para Ruanda (www.ictr.org) = CNUCED | Conférence des Nations Unies sur le Commerce et le Développement | In French = UNCTAD | United Nations Conference on Trade and Development | In English = ЮНКТАД | Конференция на ООН за търговия и развитие | In Bulgarian = CNUCYD | Conferencia de las Naciones Unidas sobre Comercio y Desarrollo | In Spanish = KUNKD | Konferenco de la Unuiĝintaj Nacioj pri Komerco kaj Disvolvado | In Esperanto = UNCTAD | გაეროს ვაჭრობისა და განვითარების კონფერენცია | In Georgian = UNCTAD | การประชุมสหประชาชาติว่าด้วยการค้าและการพัฒนา | In Thai = UNCTAD | 聯合國貿易及發展委員會 | In Chinese = ICTR | International Criminal Tribunal for Rwanda | In English = TPIR | Tribunal Pénal International pour le Rwanda | In French = MTKR | Międzynarodowy Trybunał Karny dla Rwandy | In Polish = MTTR | Medzinárodný Trestný Tribunál pre Rwandu | In Slovak |
In Spanish | → United Nations → Law, jurisprudence |
| TUE | Tratado de la Unión Europea | In Spanish | → International relations |
| U | Uranio = U | Uranio | In Esperanto = U | Uranium | In French = U | Uran | ALS = U | يورانيوم | In French = U | Uran | In Azerbaijani = U | Уран | In Belarusian = U | Уран | In Bulgarian = U | ইউরেনিয়াম | In Bengali = U | Uranijum | In Bosnian = U | Urani | In Catalan = U | Uraniu | In Corsican = U | Uran | In Czech = U | Uran | In Danish = U | Uran | In German = U | Ουράνιο | In Greek = U | Uranium | In English = U | Uraan | In Estonian = U | Uranio | In Basque = U | اورانیوم | In Persian = U | Uraani | In Finnish = U | Urani | In Friulian = U | Uranio | In Galician = U | אורניום | In Hebrew = U | Uranij | In Croatian = U | Iranyòm | HT = U | Urán | In Hungarian = U | Ուրան (տարր) | In Armenian = U | Uranium | In Indonesian = U | Uranio | In Ido = U | Úran | In Icelandic = U | Uranio | In Italian = U | ウラン | In Japanese = U | jinmrvurani | JBO = U | ಯುರೇನಿಯಮ್ | KN = U | 우라늄 | In Korean = U | Uranium | In Latin = U | Uran | In Letzeburgesh = U | Uranas | In Lithuanian = U | Urāns | In Latvian = U | യുറേനിയം | In Malayalam = U | Ilhuicateōtepoztli | En Nahuatl = U | Uran | NDS = U | Uranium | In Dutch = U | Uran | In Nynorsk = U | Uran | In Norwegian = U | Uran | In Polish = U | Urânio | In Portuguese = U | Uranyu | In Quechua = U | Uraniu | In Romanian = U | Уран | In Russian = U | यूरानियम | In Sanskrit = U | Uraniu | In Sicilian = U | Uranijum | In Serbo-Croatian = U | Urán | In Slovak = U | Uran | In Slovenian = U | Urani | SQ = U | Уранијум | In Serbian = U | Uran | In Swedish = U | Urani | In Swahili = U | யுரேனியம் | In Tamil = U | ยูเรเนียม | In Thai = U | Uranyo | In Tagalog = U | Uranyum | In Turkish = U | Уран | In Ukrainian = U | Urani | In Vietnamese = U | 鈾 | In Chinese |
In Spanish | → Chemistry |
| UAM | Universidad Autónoma de Manizales (www.autonoma.edu.co) | In Spanish | → Higher education, universities |
| UAM | Universidad Autónoma Metropolitana (www.uam.mx) | In Spanish | → Higher education, universities |
| UAM | Universidad Autónoma de Madrid (www.uam.es) | In Spanish | → Higher education, universities |
| UCLM | Universidad de Castilla la Mancha | In Spanish | → Higher education, universities |
| UCSG | Universidad Católica Santiago de Guayaquil | In Spanish | → Roman catholic church → Higher education, universities |
| UE | Unión Europea (http://europa.eu) = EU | European Union | In English = UE | Union Européenne | In French = UE | Unió Europea | In Catalan = UE | Unaniezh Europa | In Breton = EU | Europäische Union | In German = UE | Unia Europejska | In Polish = EU | Europese Unie | In Afrikaans = UE | Unión Europeya | In Aragonese = EU | Evropská Unie | In Czech = ЕС | Европейският съюз | In Bulgarian = EU | Eùropejskô Ùnijô | In Kashubian = ΕΕ | Ευρωπαϊκή Ένωση | In Greek = EU | Europæiske Union | In Danish = UE | Undeb Ewropeaidd | In Welsh = EU | Eŭropa Unio | In Esperanto = JU | Jeropeeske Uny | In Frisian = AE | An tAontas Eorpach | In Irish = EB | Europar Batasuna | In Basque = EU | Europska Unija | In Croatian = EU | Euroopan unioni | In Finnish = EU | Evropska Unija | In Bosnian = UÛ | Unnion Ûropéenne | In Norman = ES | Europas Sājonga | In Baltic languages = UE | Uniaun Europeia | In Tetum = UE | Unyong Europeo | In Tagalog = EU | Európai Unió | In Hungarian = EU | Europeiska unionen | In Swedish = EU | Europana Uniono | In Ido = UE | Uni Eropa | In Indonesian = ESB | Evrópusambandið | In Icelandic |
In Spanish | → International relations → European Union |
| UEM | Unión Económica y Monetaria = EMU | Economische Monetaire Unie | VLS = EMU | Economic and Monetary Union | In English = EMU | Ekonomiska och monetära unionen | In Swedish = UGiW | Unia Gospodarcza i Walutowa | In Polish = EMU | Economische en Monetaire Unie | In Dutch = EWG | Europäesch Wirtschafts- a Währungsunioun | In Letzeburgesh = EGMU | Európai Gazdasági és Monetáris Unió | In Hungarian = UEM | Union économique et monétaire | In French = EWWU | Europäische Wirtschafts- und Währungsunion | In German = ØMU | Økonomiske og Monetære Union | In Danish = EMU | Evropská měnová unie | In Czech = UEM | Unione Economica e Monetaria | In Italian = UEM | Unió econòmica i monetària | In Catalan |
In Spanish | → Economics → European Union |
| UFM | Universidad Francisco Marroquín | In Spanish | → Higher education, universities |
| UFP | Unión Federal de Policia | In Spanish | → Organizations and associations → Police |
| UGT | Unión General de Trabajadores | In Spanish | → Organizations and associations → Labour, labour economics |
| UJI | Universitat Jaume I | In Spanish | → Higher education, universities |
| UMA | Unión del Magreb Árabe = SAM | Svaz arabského Maghrebu | In Czech = UMA | Union du Maghreb Arabe | In French = UMA | Unaniezh Maghrib Arab | In Breton = AMU | Arabische Maghreb-Union | In German = UMA | Unione del Maghreb Arabo | In Italian = UMA | União do Maghreb Árabe | In Portuguese = САМ | Союз арабского Магриба | In Russian |
In Spanish | → International relations |
| UMA | Unión de Mujeres Antifascistas | In Spanish | → Organizations and associations → Feminism |
| UNACH | Universidad Nacional de Chimborazo | In Spanish | → Higher education, universities |
| UNEMI | Universidad Estatal de Milagro | In Spanish | → Higher education, universities |
| UNITEC | Universidad Tecnológica Centroamericana | In Spanish | → Higher education, universities → Engineering, technology |
| UNL | Universidad Nacional de Loja | In Spanish | → Higher education, universities |
| UPC | Universitat Politècnica de Catalunya (www.upc.es) | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities |
| UPCP | Unión del Personal Civil de la Provincia | In Spanish | → Organizations and associations → Labour, labour economics → Regional administration |
| UPV | Universitat Politècnica de València (www.upv.es) | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities |
| URSS | Unión de Repúblicas Socialistas Soviéticas = URSS | Unaniezh ar Republikoù Sokialour Soviedel | In Breton = URSS | Union des Républiques Socialistes Soviétiques | In French = USSR | Unie van Sosialistiese Sowjetrepublieke | In Afrikaans = USSR | Union of Soviet Socialist Republics | In English = СССР | Сою́з Сове́тских Социалисти́ческих Респу́блик | In Russian = CCCP | Съюзът на съветските социалистически републики | In Bulgarian = SSSR | Soyuz Sovetskikh Sotsialisticheskikh Respublik | In Russian = URSS | Unión de Republicas Sozialistas Sobieticas | In Aragonese = XRSS | Xunión de les Repúbliques Socialistes Soviétiques | In Asturian = SSRİ | Sovet Sosialist Respublikaları İttifaqı | In Azerbaijani = TSRS | Tarybu Socialistiniu Respubliku Sajunga | In Baltic languages = SSSR | Savez Sovjetskih Socijalističkih Republika | In Serbo-Croatian = URSS | Unió de Repúbliques Socialistes Soviètiques | In Catalan = SSSR | Svaz sovětských socialistických republik | In Czech = USSR | Unio de Sovetaj Socialismaj Respublikoj | In Esperanto = CCCP | Социаллă Совет Республикисен Союзĕ | In Chuvash = USSR | Unionen af Socialistiske Sovjetrepublikker | In Danish = URSS | Unione delle Repubbliche Socialiste Sovietiche | In Italian = ZSRR | Związek Socjalistycznych Republik Radzieckich | In Polish = SSKS | Szovjet Szocialista Köztársaságok Szövetsége | In Hungarian = UdSSR | Union der Sozialistischen Sowjetrepubliken | In German = ΕΣΣΔ | Ένωση Σοβιετικών Σοσιαλιστικών Δημοκρατιών | In Greek = NSVL | Nõukogude Sotsialistlike Vabariikide Liit | In Estonian = SESB | Sobietar Errepublika Sozialisten Batasuna | In Basque = USSR | Uny fan Sosjalistyske Sowjetrepublyken | In Frisian = ԽՍՀՄ | Խորհրդային Սոցիալիստական Հանրապետությունների Միություն | In Armenian = URSS | Unión das Repúblicas Socialistas Soviéticas | In Galician = სსრკ | საბჭოთა სოციალისტური რესპუბლიკების კავშირი | In Georgian = URSS | Unio Rerum Publicarum Socialisticarum Sovieticarum | In Latin = CCPC | Советтик Социалисттик Республикалар Союзу | In Kirghiz = UdSSR | Unioun vun de Sozialistesche Sowjetrepubliken | In Letzeburgesh = PSRS | Padomju Sociālistisko Republiku Savienība | In Latvian = СССР | Сојуз на Советските Социјалистички Републики | In Macedonian = УРСС | Униуня Републичилор советиче Сочиалисте | In Moldavan = KRSS | Kesatuan Republik Sosialis Soviet | In Malay = USSR | Unie van Socialistische Sovjetrepublieken | In Dutch = SSSR | Sambandet av Sosialistiske Sovjet-Republikkar | In Nynorsk = SSSR | Samveldet av sovjetiske sosialistrepublikker | In Norwegian = URSS | Unnion d'Républyiques Socialistes Soviétiques | In Norman = URSS | União das Repúblicas Socialistas Soviéticas | In Portuguese = URSS | Union de las Republicas Socialistas Sovieticas | In Occitan = SSRH | Susyalista Suwit Republikakunap Huñun | In Quechua = ССРЦ | Советон Социалистон Республикæты Цæдис | In Ossetian = URSS | Uniunea Republicilor Sovietice Socialiste | In Romanian = URSS | Unioni dî ripùbblichi sucialisti suviètichi | In Sicilian = ZSSR | Zveza sovjetskih socialističnih republik | In Slovenian = СССР | Савез Совјетских Социјалистичких Република | In Serbian = SSCB | Sovyet Sosyalist Cumhuriyetler Birliği | In Turkish = СРСР | Союз Радянських Соціалістичних Республік | In Ukrainian = SSRB | Sovet Sosialistik Republiklar Berlege | In Tatar = SSRI | Sovet Sotsialistik Respublikalar Ittifoqi | In Uzbek |
In Spanish | → International relations → Geography |
| USFQ | Universidad San Francisco de Quito | In Spanish | → Higher education, universities |
| USO | Unión Sindical Obrera | In Spanish | → Organizations and associations → Labour, labour economics |
| UTA | Universidad Técnica de Ambato | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities → Engineering, technology |
| UTE | Universidad Técnológica Equinoccial | In Spanish | → Higher education, universities → Engineering, technology |
| UTE | Universidad Técnica Equinoccial | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities → Engineering, technology |
| UTN | Universidad Técnica del Norte | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities → Engineering, technology |
| UTPL | Universidad Técnica Particular de Loja | In Spanish | → Specialized or (poly)technical colleges → Higher education, universities → Engineering, technology |
| V | Valina = V | Valine | In English = V | Valina | In Catalan = V | Valin | In Czech = V | Valin | In Danish = V | Valin | In German = V | Valino | In Esperanto = V | Valine | In French = V | 발린 | In Korean = V | Valin | In Croatian = V | Valin | In Indonesian = V | Valina | In Italian = V | :ולין | In Hebrew = V | Valīns | In Latvian = V | Valin | In Letzeburgesh = V | Valinas | In Lithuanian = V | Valine | In Dutch = V | バリン | In Japanese = V | Walina | In Polish = V | Valina | In Portuguese = V | Валин | In Russian = V | Valină | In Romanian = V | Valiini | In Finnish = V | Valin | In Swedish = V | Valin | In Turkish = V | Валін | In Ukrainian = V | 缬氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| W | Triptófano = W | Tryptophan | In English = W | ট্রিপ্টোফ্যান | In Bengali = W | Triptòfan | In Catalan = W | Tryptofan | In Danish = W | Tryptophan | In German = W | Triptofano | In Esperanto = W | Tryptophane | In French = W | 트립토판 | In Korean = W | Triptofan | In Indonesian = W | Triptofano | In Italian = W | טריפטופן | In Hebrew = W | Triptofāns | In Latvian = W | Tryptophan | In Letzeburgesh = W | Triptofanas | In Lithuanian = W | Tryptofaan | In Dutch = W | トリプトファン | In Japanese = W | Tryptofan | In Norwegian = W | Tryptofan | In Polish = W | Triptófano | In Portuguese = W | Triptofan | In Romanian = W | Триптофан | In Russian = W | Tryptofán | In Slovak = W | Tryptofaani | In Finnish = W | Tryptofan | In Swedish = W | Triptofan | In Turkish = W | Триптофан | In Ukrainian = W | 色氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |
| Y | Tirosina = Y | Tyrosine | In English = Y | تيروسين | In Arabic = Y | Tirosina | In Catalan = Y | Tyrosin | In Danish = Y | Tyrosin | In German = Y | Tirozino | In Esperanto = Y | Tyrosine | In French = Y | 티로신 | In Korean = Y | Tirosin | In Indonesian = Y | Tirosina | In Italian = Y | טירוזין | In Hebrew = Y | Tirozīns | In Latvian = Y | Tyrosin | In Letzeburgesh = Y | Tirozinas | In Lithuanian = Y | Tyrosine | In Dutch = Y | ja:チロシン | In Japanese = Y | Tyrozyna | In Polish = Y | Tirosina | In Portuguese = Y | Тирозин | In Russian = Y | Tirosin | SU = Y | Tyrosiini | In Finnish = Y | Tyrosin | In Swedish = Y | Тирозин | In Ukrainian = Y | 酪氨酸 | In Chinese |
In Spanish | → Biochemistry, biophysics |