| CSDF | Centro per lo Studio della Dinamica dei Fluidi | In Italian | → Aerodynamics |
| CSST | Centro Studi sui Sistemi di Trasporto | In Italian | → Vehicle engineering → Transport and postal services |
| CSUE | Centro Satellitare dell'Unione Europea (www.eusc.europa.eu) = EUSC | European Union Satellite Centre | In English = CSUE | Centro de Satélites de la Unión Europea | In Spanish |
In Italian | → European Union → Spaceflight engineering, astronautics |
| CTI | Comitato Termotecnico Italiano | In Italian | → Mechanical engineering |
| CTP | Compagnia Teatrale Pariniana | In Italian | → Theatre |
| CTSIS | Coordinamento per la Tutela del Settore Intrattenimento e Spettacolo | In Italian | → Organizations and associations → Entertainment |
| CUAMM | Collegio Universitario Aspiranti e Medici Missionari | In Italian | → Specialized or (poly)technical colleges → Medicine |
| CUQ | Confederazione Unitaria dei Quadri | In Italian | → Organizations and associations → Labour, labour economics |
| CVCS | Centro Volontari Cooperazione allo Sviluppo | In Italian | → Organizations and associations → Development |
| CVM | Centro Volontari Marchigiani | In Italian | → Organizations and associations |
| D | Acido aspartico = D | Aspartic Acid | In English = D | অ্যাস্পার্টিক অ্যাসিড | In Bengali = D | Kyselina asparagová | In Czech = D | Asparaginsäure | In German = D | Ácido aspártico | In Spanish = D | Asparta acido | In Esperanto = D | Acide aspartique | In French = D | 아스파르트산 | In Korean = D | Asam aspartat | In Indonesian = D | Àcid aspàrtic | In Catalan = D | חומצה אספרטית | In Hebrew = D | Asparagīnskābe | In Latvian = D | Asparto rūgštis | In Lithuanian = D | Aszparaginsav | In Hungarian = D | Asparaginezuur | In Dutch = D | アスパラギン酸 | In Japanese = D | Kwas asparaginowy | In Polish = D | Ácido aspártico | In Portuguese = D | Аспарагиновая кислота | In Russian = D | Asparagiinihappo | In Finnish = D | Asparaginsyra | In Swedish = D | Aspartat | In Turkish = D | Аспарагінова кислота | In Ukrainian |
In Italian | → Biochemistry, biophysics |
| DCI | Denominazione Comune Internazionale = DCI | Dénomination Commune Internationale | In French = INN | International Nonproprietary Name | In English = DCI | Denominación Común Internacional | In Spanish = МНН | Международное непатентованное название | In Russian |
In Italian | → Pharmacology, toxicology |
| DIASP | Dipartimento di Ingegneria Aeronautica e Spaziale | In Italian | → Aeronautics, aircraft → Spaceflight engineering, astronautics |
| DISF | Dizionario Interdisciplinare di Scienza e Fede | In Italian | |
| DPU | Dalla Parte degli Ultimi | In Italian | → Organizations and associations |
| E | Acido glutammico = E | Glutamic Acid | In English = E | গ্লুটামিক অ্যাসিড | In Bengali = E | Àcid glutàmic | In Catalan = E | Kyselina glutamová | In Czech = E | Glutaminsäure | In German = E | Ácido glutámico | In Spanish = E | Glutama acido | In Esperanto = E | Acide glutamique | In French = E | 글루탐산 | In Korean = E | Asam glutamat | In Indonesian = E | חומצה גלוטמית | In Hebrew = E | Glutamīnskābe | In Latvian = E | Glutamo rūgštis | In Lithuanian = E | Glutaminezuur | In Dutch = E | Глутаминовая кислота | In Russian = E | Glutamiinihappo | In Finnish = E | Glutaminsyra | In Swedish = E | กลูตาเมต | In Thai = E | Глутамінова кислота | In Ukrainian = E | 穀氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| EDE | Europa Democrazia Esperanto (www.e-d-e.org) = EDE | Europe Démocratie Espéranto | In French = EDE | Eŭropo Demokratio Esperanto | In Esperanto = EDE | Europa Demokratie Esperanto | In German = EDE | Europe Democracy Esperanto | In English = ΕΔΕ | Ευρώπη - Δημοκρατία - Εσπεράντο | In Greek = EDE | Europa Democracia Esperanto | In Spanish = EDE | Europa Demokracija Esperanto | In Croatian = EDE | Europa Democratie Esperanto | In Dutch = EDE | Európa Demokrácia Eszperantó | In Hungarian = EDE | Europa Demokratija Esperanto | In Lithuanian = EDE | Europa Demokracja Esperanto | In Polish = EDE | Europa Demokrati Esperanto | In Swedish |
In Italian | → Political parties and movements |
| ENAC | Ente Nazionale per l'Aviazione Civile | In Italian | → Aeronautics, aircraft → Transport and postal services |
| ENAM | Ente Nazionale di Assistenza Magistrale | In Italian | |
| ENEL | Ente Nazionale per l'Energia eLettrica | In Italian | → Electrical engineering |
| ENPALS | Ente Nazionale Previdenza e Assistenza Lavoratori Spettacolo (www.enpals.it) | In Italian | → Entertainment |
| ESB | Encefalopatia Spongiforme Bovina = BSE | Bovine Spongiform Encephalopathy | In English = ESB | Encéphalopathie Spongioforme Bovine | In French = BSE | Bova Spongoforma Encefalopatio | In Esperanto = EEB | Encefalopatía Espongiforme Bovina | In Portuguese = BSE | Bovine Spongiforme Enzephalopathie | In German = BSE | Bovin spongiform ensefalopati | In Turkish = ESB | Encephalopathia Spongiforme Bovin | In Interlingua = BSE | Boviene spongiforme encefalopathie | In Dutch = GSE | Goveđa spongiformna encefalopatija | In Serbo-Croatian |
In Italian | → Veterinary medicine |
| F | Fenilalanina = F | Phenylalanine | In English = F | فينيلألانين | In Arabic = F | Фенилаланин | In Bulgarian = F | Fenilalanina | In Catalan = F | Fenylalanin | In Czech = F | Fenylalanin | In Danish = F | Phenylalanin | In German = F | Fenilalanina | In Spanish = F | Fenilalanino | In Esperanto = F | Phénylalanine | In French = F | 페닐알라닌 | In Korean = F | Fenilalanin | In Croatian = F | Fenilalanin | In Indonesian = F | פנילאלנין | In Hebrew = F | Fenilalanīns | In Latvian = F | Phenylalanin | In Letzeburgesh = F | Fenilalaninas | In Lithuanian = F | Fenilalanin | In Hungarian = F | Fenylalanine | In Dutch = F | フェニルアラニン | In Japanese = F | Fenylalanin | In Norwegian = F | Fenyloalanina | In Polish = F | Fenilalanina | In Portuguese = F | Фенилаланин | In Russian = F | Фенилаланин | In Serbian = F | Fenyylialaniini | In Finnish = F | Fenylalanin | In Swedish = F | Fenilalanin | In Turkish = F | Фенілаланін | In Ukrainian = F | 苯丙氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| F | Fluoro = F | Fluor | In French = F | Fluoor | In Afrikaans = F | فلور | In Arabic = F | Flúor | In Asturian = F | Flüor | In Azerbaijani = F | ফ্লুরিন | In Bengali = F | Fluor | In Bosnian = F | Fluor | In Catalan = F | Fluoru | In Corsican = F | Fluor | In Czech = F | Фтор | In Chuvash = F | Fflworin | In Welsh = F | Fluor | In Danish = F | Fluor | In German = F | Φθόριο | In Greek = F | Fluorine | In English = F | Fluoro | In Esperanto = F | Flúor | In Spanish = F | Fluor | In Estonian = F | Fluor | In Basque = F | فلوئور | In Persian = F | Fluori | In Finnish = F | Flúor | In Galician = F | פלואור | In Hebrew = F | फ्लोरिन | In Hindi = F | Fluor | In Croatian = F | Fliyò | HT = F | Fluor | In Hungarian = F | Ֆտոր | In Armenian = F | Fluor | In Indonesian = F | Fluoro | In Ido = F | Flúor | In Icelandic = F | フッ素 | In Japanese = F | li'orkliru | JBO = F | 플루오린 | In Korean = F | Fluor | In Kurdish = F | Fluor | In Latin = F | Fluor | In Letzeburgesh = F | Fluoras | In Lithuanian = F | Fluors | In Latvian = F | Hau kōwhai | In Māori = F | Флуор | In Macedonian = F | ഫ്ലൂറിന് | In Malayalam = F | फ्लोरिन | MR = F | Fluor | In Dutch = F | Fluor | In Nynorsk = F | Fluor | In Norwegian = F | Fluore | NOV = F | Fluor | In Occitan = F | Fluor | In Polish = F | Flúor | In Portuguese = F | Flur | In Quechua = F | Fluor | In Romanian = F | Фтор | In Russian = F | Fluoru | In Sicilian = F | Fluor | In Serbo-Croatian = F | Fluór | In Slovak = F | Fluor | In Slovenian = F | Флуор | In Serbian = F | Fluor | In Swedish = F | Florini | In Swahili = F | ஃவுளூரின் | In Tamil = F | Фтор | In Tajik = F | ฟลูออรีน | In Thai = F | Flor | In Turkish = F | Флуор | In Ukrainian = F | Ftor | In Uzbek = F | Flo | In Vietnamese = F | 氟 | In Chinese |
In Italian | → Chemistry |
| FAC | Comitato Nazionale per la Diffusione del Film d'Arte e di Cultura | In Italian | → Organizations and associations → Cinema, movies |
| FAPAV | Federazione Anti-Pirateria Audiovisiva (www.fapav.it) | In Italian | → Organizations and associations → Computer-based techniques → Cinema, movies |
| FAST | Federazione delle Assoziazioni Scientifiche e Tecniche | In Italian | → Organizations and associations → Mathematics and natural sciences → Applied sciences, technology |
| FDU | Fratelli Dell'Uomo | In Italian | → Organizations and associations |
| FEAOG | Fondo Europeo Agricolo di Orientamento e di Garanzia = FEOGA | Fonds Européen d'Orientation et de Garantie Agricole | In French = EAGFL | Europäischer Ausrichtungs- und Garantiefonds für Landwirtschaft | In German = EAGGF | European Agriculture Guidance and Guarantee Funds | In English = EFOiGR | Europejski Fundusz Orientacji i Gwarancji Rolnej | In Polish = EUGFJ | Europeiska utvecklings- och garantifonden för jordbruket | In Swedish |
In Italian | → International relations → European Union → Agricultural sciences |
| FEAOSC | Federazione Europea Artisti ed Operatori dello Spettacolo e della Cultura (www.akkuaria.com/feaosc/) | In Italian | → Organizations and associations → Arts |
| FEASR | Fondo Europeo Agricolo per lo Sviluppo Rurale = FEADER | Fonds Européen Agricol pour le Développement Rural | In French = FEADER | Fondo Europeo Agrícola de Desarrollo Rural | In Spanish = ELFUL | Europæiske Landbrugsfond for Udvikling af Landdistrikterne | In Danish = ELER | Europäischer Landwirtschaftsfonds für die Entwicklung des ländlichen Raums | In German = ΕΓΤΑΑ | Ευρωπαϊκό Γεωργικό Ταμείο Αγροτικής Ανάπτυξης | In Greek = EAFRD | European Agricultural Fund for Rural Development | In English = ELFPO | Europees Landbouwfonds voor Plattelandsontwikkeling | In Dutch = FEADER | Fundo Europeu Agrícola de Desenvolvimento Rural | In Portuguese = EJFLU | Europeiska jordbruksfonden för landsbygdsutveckling | In Swedish |
In Italian | → Agricultural sciences |
| FEDIC | Federazione Italiana dei Cineclub (www.cortoweb.it/fedic/) | In Italian | → Organizations and associations → Cinema, movies |
| FEI | Federazione Italiana Erboristi | In Italian | → Organizations and associations |
| FEI | Federazione Esperantista Italiana (www.esperanto.it) | In Italian | → Organizations and associations |
| FENAPRO | Federazione Nazionale Profumieri | In Italian | → Organizations and associations |
| FEPI | Federazione Europea (delle) Professioni Infermieristiche | In Italian | → Organizations and associations → Medicine |
| FESNCE | Federazione Europea della Società Nazionali di Chirurgia Estetica = FESNCE | Fédération Européenne des Sociétés Nationales de Chirurgie Esthétique | In French |
In Italian | → Organizations and associations → Plastic surgery |
| FESR | Fondo Europeo di Sviluppo Regionale = EFRE | Europäischer Fonds für regionale Entwicklung | In German = FEDER | Fonds Européen de Développement Régional | In French = ERDF | European Regional Development Fund | In English = EFRR | Europejski Fundusz Rozwoju Regionalnego | In Polish = ERUF | Europeiska regionala utvecklingsfonden | In Swedish |
In Italian | → International relations → European Union → Regional planning |
| FGS | Federazione dei Giovani Socialisti (www.giovanisocialisti.it) | In Italian | → Political parties and movements |
| FIAIP | Federazione Italiana Agenti Immobiliari Professionali | In Italian | → Organizations and associations → Accommodation |
| FIAIS | Federazione Internazionale degli Archivi delle Immagini e dei Suoni | In Italian | → Organizations and associations → Libraries → Cinema, movies |
| FIAT | Fabbrica Italiana Automobili Torino | In Italian | → Vehicle engineering |
| FIAVET | Federazione Italiana Associazioni Imprese Viaggi e Turismo | In Italian | → Organizations and associations → Tourism |
| FICC | Federazione Italiana dei Circoli del Cinema (www.ficc.it) | In Italian | → Organizations and associations → Cinema, movies |
| FICE | Federazione Italiana Cinema d'Essai (www.fice.it) | In Italian | → Organizations and associations → Cinema, movies |
| FID | Federazione Italiana Danza | In Italian | → Organizations and associations |
| FID | Federazione Italiana Dama | In Italian | → Organizations and associations |
| FIDA | Federazione Italina Distribuzione Alimentare | In Italian | → Organizations and associations → Food technology |
| FIDAL | Federazione Italiana di Atletica Leggera | In Italian | → Organizations and associations → Sport, physical exercises |
| FIGISC | Federazione Italiana Gestori Impianti Stradali di Carburanti | In Italian | → Organizations and associations |
| FIMA | Federazione Italiana Mercante d'Arte | In Italian | → Organizations and associations → Trade → Arts |
| FIMAA | Federazione Italiana Mediatori e Agenti d'Affari in mediazione | In Italian | → Organizations and associations |
| FIMM | Fabbrica Italiana Magneti Marelli | In Italian | → Mechanical engineering → Automobile manufacturing |
| FINEL | Finanziaria di Partecipazioni Elettriche | In Italian | → Finance → Electrical engineering |
| FIPE | Federazione Italiana Pubblici Esercizi | In Italian | → Organizations and associations |
| FIPPA | Federazione Italiana Panificatori, Panificatori-Pasticceri ed Affini | In Italian | → Organizations and associations → Food technology |
| FIR | Federazione Italiana Rugby | In Italian | → Organizations and associations → Football and rugby |
| FISTEL | Federazione Informazione Spettacolo e Telecomunicazioni | In Italian | → Organizations and associations → Entertainment → Telecommunications |
| FIT | Federazione Italiana Tabaccai | In Italian | → Organizations and associations |
| FIVRE | Fabbrica Italiana Valvole Radio Elettriche | In Italian | → Electrical engineering |
| FMSI | Federazione Medico Sportiva Italiana | In Italian | → Organizations and associations → Medicine → Sport, physical exercises |
| FNAARC | Federazione Nazionale Associazioni Agenti e Rappresentanti di Commercio | In Italian | → Organizations and associations → Trade |
| FNAS | Federazione Nazionale Arte di Strada | In Italian | → Organizations and associations → Arts |
| FNOMCeO | Federazione Nazionale degli Ordini dei Medici Chirurghi e degli Odontoiatri | In Italian | → Organizations and associations → Surgery, orthopaedics, ophthalmology |
| FPA | Formazione, perfezionamento professionale e aggiornamento continuo | In Italian | → Education |
| FSE | Fondo Sociale Europeo = ESF | European Social Fund | In English = FSE | Fonds Social Européen | In French = FSE | Fondo Social Europeo | In Spanish = ESF | Europees Sociaal Fonds | In Dutch = EFS | Europejski Fundusz Społeczny | In Polish = ESF | Europeiska socialfonden | In Swedish |
In Italian | → Public finance → European Union → Social welfare |
| FTI | Forum per la Tecnologia della Informazione | In Italian | → Organizations and associations → Computer science → Telecommunications |
| G | Glicina = G | Glycine | In English = G | গ্লাইসিন | In Bengali = G | Glicina | In Catalan = G | Glycin | In Czech = G | Glycin | In Danish = G | Glycin | In German = G | Glicina | In Spanish = G | Glicino | In Esperanto = G | Glycine | In French = G | 글리신 | In Korean = G | Glicin | In Croatian = G | Glisin | In Indonesian = G | גליצין | In Hebrew = G | Glicīns | In Latvian = G | Glycin | In Letzeburgesh = G | Glicinas | In Lithuanian = G | Glicin | In Hungarian = G | Glycine | In Dutch = G | グリシン | In Japanese = G | Glycin | In Norwegian = G | Glicyna | In Polish = G | Glicina | In Portuguese = G | Глицин | In Russian = G | Глицин | In Serbian = G | Glisin | SU = G | Glysiini | In Finnish = G | Glycin | In Swedish = G | Glisin | In Turkish = G | Гліцин | In Ukrainian = G | 甘氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| GCFI | Giornale Critico della Filosofia Italiana | In Italian | → Serial publications, periodicals → Philosophy, psychology |
| GDO | Grande Distribuzione Organizzata | In Italian | → Organizations and associations → Transport and postal services |
| GICi | Gruppo Italiano RV Tauri Circolare | In Italian | → Astronomy |
| GIRM | Gruppo Interdivisionale Risonanze Magnetiche | In Italian | → Organizations and associations → Chemistry |
| GIRPR | Gruppo Italiano Ricercatori in Pattern Recognition | In Italian | → Organizations and associations → Computer-based techniques |
| GIRSE | Gruppo Italiano di Risonanza di Spin Elettronico | In Italian | → Nuclear, atomic, and molecular physics |
| GM | Giornale di Metafisica | In Italian | → Serial publications, periodicals → Metaphysics |
| GMA | Gruppo Missioni Asmara | In Italian | → Organizations and associations |
| GMM | Gruppo Missionario Merano | In Italian | → Organizations and associations |
| GNV | Gruppo Nazionale per la Vulcanologia (http://gnv.ingv.it) | In Italian | → Research institutes → 55121 |
| GRAV | Gruppo di Ricerca Astrofotometrica Variabilisti | In Italian | → Astronomy |
| GRT | Gruppo per le Relazioni Transculturali | In Italian | → Organizations and associations → Civilization, culture, progress |
| GVC | Gruppo Volontariato Civile | In Italian | → Organizations and associations |
| H | Istidina = H | Histidine | In English = H | Histidin | In Bosnian = H | Histidina | In Catalan = H | Histidin | In Czech = H | Histidin | In German = H | Histidina | In Spanish = H | Histidino | In Esperanto = H | Histidine | In French = H | 히스티딘 | In Korean = H | Histidin | In Croatian = H | Histidin | In Indonesian = H | היסטידין | In Hebrew = H | Histidīns | In Latvian = H | Histidin | In Letzeburgesh = H | Histidinas | In Lithuanian = H | Hisztidin | LU = H | Histidine | In Dutch = H | ヒスチジン | In Japanese = H | Histidin | In Norwegian = H | Histydyna | In Polish = H | Histidina | In Portuguese = H | Гистидин | In Russian = H | Histidiini | In Finnish = H | Histidin | In Swedish = H | Histidin | In Turkish = H | Гістидин | In Ukrainian = H | 組氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| H | Idrogeno = H | Hydrogène | In French = H | Waterstof | In Afrikaans = H | هيدروجين | In Arabic = H | Hidróxenu | In Asturian = H | Hidrogen | In Azerbaijani = H | Wassastoff | BAR = H | Вадарод | In Belarusian = H | Водород | In Bulgarian = H | হাইড্রোজেন | In Bengali = H | Hidrogen | In Breton = H | Vodonik | In Bosnian = H | Hidrogen | In Catalan = H | Idroheno | CEB = H | Idrogenu | In Corsican = H | Vodík | In Czech = H | Водород | In Chuvash = H | Hydrogen | In Welsh = H | Brint | In Danish = H | Wasserstoff | In German = H | Υδρογόνο | In Greek = H | Hydrogen | In English = H | Hidrogeno | In Esperanto = H | Hidrógeno | In Spanish = H | Vesinik | In Estonian = H | Hidrogeno | In Basque = H | هیدروژن | In Persian = H | Vety | In Finnish = H | Hydrogen | In Faroese = H | Idrogjen | In Friulian = H | Hidrigin | In Irish = H | Haidreagain | GD = H | Hidróxeno | In Galician = H | હાઈડ્રોજન | GU = H | מימן | In Hebrew = H | हाइड्रोजन | In Hindi = H | Vodik | In Croatian = H | Idwojèn | HT = H | Hidrogén | In Hungarian = H | Ջրածին | In Armenian = H | Hydrogeno | In Interlingua = H | Hidrogen | In Indonesian = H | Hidrogeno | In Ido = H | Vetni | In Icelandic = H | 水素 | In Japanese = H | წყალბადი | In Georgian = H | អ៊ីដ្រូសែន | KM = H | ಜಲಜನಕ | KN = H | 수소 | In Korean = H | Hîdrojen | In Kurdish = H | Hydrogenium | In Latin = H | Waasserstoff | In Letzeburgesh = H | Waterstof | LI = H | Idrògen | In Lombard = H | Idrojɛ́ní | In Lingala = H | Vandenilis | In Lithuanian = H | Ūdeņradis | In Latvian = H | Hauwai | In Māori = H | Водород | In Macedonian = H | ഹൈഡ്രജന് | In Malayalam = H | Устөрөгч | In Mongolian = H | हायड्रोजन | MR = H | Hidrogen | In Malay = H | Āyōcoxqui | En Nahuatl = H | Waterstoff | NDS = H | Waterstof | In Dutch = H | Hydrogen | In Nynorsk = H | Hydrogen | In Norwegian = H | Hidrogene | NOV = H | Idrogèn | In Occitan = H | Hiidrojen | PIH = H | Wodór | In Polish = H | Hidrogénio | In Portuguese = H | Yakuchaq | In Quechua = H | Hidrogen | In Romanian = H | Водород | In Russian = H | हाइड्रोजन | In Sanskrit = H | Idrògginu | In Sicilian = H | Vodik | In Serbo-Croatian = H | Vodík | In Slovak = H | Vodik | In Slovenian = H | Hidrogjeni | SQ = H | Водоник | In Serbian = H | Hidrogén | SU = H | Väte | In Swedish = H | Hidrojeni | In Swahili = H | ஹைட்ரஜன் | In Tamil = H | హైడ్రోజన్ | TE = H | Ҳидроген | In Tajik = H | ไฮโดรเจน | In Thai = H | Idroheno | In Tagalog = H | Hidrojen | In Turkish = H | Водень | In Ukrainian = H | آبگر | UR = H | Vodorod | In Uzbek = H | Hiđrô | In Vietnamese = H | Woaterstof | VLS = H | Idrodjinne | In Walloon = H | 氢 | WUU = H | היידראזשן | In Yiddisch = H | 氢 | In Chinese |
In Italian | → Chemistry |
| I | Isoleucina = I | Isoleucine | In English = I | Isoleucina | In Catalan = I | Isoleucin | In Danish = I | Isoleucin | In German = I | Isoleucina | In Spanish = I | Izoleŭcino | In Esperanto = I | Isoleucine | In French = I | 이소류신 | In Korean = I | Izoleucin | In Croatian = I | Isoleusin | In Indonesian = I | איזולאוצין | In Hebrew = I | Izoleicīns | In Latvian = I | Isoleucin | In Letzeburgesh = I | Izoleucinas | In Lithuanian = I | Isoleucine | In Dutch = I | イソロイシン | In Japanese = I | Izoleucyna | In Polish = I | Isoleucina | In Portuguese = I | Изолейцин | In Russian = I | Isoleusiini | In Finnish = I | Isoleucin | In Swedish = I | İzolösin | In Turkish = I | Ізолейцин | In Ukrainian = I | 異亮氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| IADIP | Istituto Africano di Diritto Internazionale | In Italian | → International law |
| IBBA | Istituto di Biologia e Biotecnologia Agraria: Sezione di Pisa | In Italian | → Biological sciences → Biotechnology |
| IBF | Istituto di Biofisica | In Italian | → Biochemistry, biophysics |
| IBO | Associazione Italiana Soci Costruttori | In Italian | → Associations |
| ICE | Istituto nazionale per il Commercio Estero | In Italian | → Trade |
| ICEI | Istituto Cooperazione Economica Internazionale | In Italian | → Organizations and associations → International economic cooperation |
| ICU | Istituto per la Cooperazione Universitaria | In Italian | → Organizations and associations → Higher education, universities |
| IEI | Istituto di Elaborazione dell’Informazione | In Italian | → Computer science |
| IFC | Istituto di Fisiologia Clinica | In Italian | → Physiology |
| IfP | Incontro fra i Popoli | In Italian | → Organizations and associations |
| IGG | Istituto di Geoscienze e Georisorse | In Italian | → Earth sciences |
| IIN | Istituto Italiano di Navigazione = IIN | Italian Institute of Navigation | In English |
In Italian | → Geodesy, cartography → Vehicle engineering |
| IINA | Atti dell'Istituto Italiano di Navigazione | In Italian | → Serial publications, periodicals → Geodesy, cartography → Vehicle engineering |
| IIT | Istituto di Informatica e Telematica | In Italian | → Computer science → Telecommunications |
| ILC | Istituto di Linguistica Computazionale | In Italian | → Computer-based techniques → Linguistics |
| IMAIE | Istituto per i diritti degli Artisti Interpreti Esecutori (www.imaie.it) | In Italian | → Cinema, movies |
| IMF | Impianti Macchine Fonderia | In Italian | → Metallurgy |
| IMQ | Istituto Italiano del Marchio di Qualità (www.imq.it) | In Italian | → Quality management |
| IN | Istituto di Neuroscienze | In Italian | → Anatomy → Neurology |
| INA | Istituto Nuova Africa | In Italian | → Organizations and associations |
| IPCF | Istituto per i Processi Chimico-Fisici | In Italian | → Chemistry → Chemical technology |
| IPI | Istituto per la Promozione Industriale | In Italian | → Industry, industrial policy → Engineering, technology |
| IPOCAN | Istituto per l'Oriente Carlo Alfonso Nallino | In Italian | → Language, linguistics, literature → Geography, biography, history |
| IRAS | Istituto Spezzino Ricerche Astronomiche | In Italian | → Research institutes → Astronomy |
| IRCCS | Istituto di Ricovero e Cura a Carattere Scientifico | In Italian | → Research institutes → Research policy |
| IRES | Istituto di Ricerche Economiche e Sociali | In Italian | → Economics → Social welfare |
| ISCOS | Istituto Sindacale per la Cooperazione allo Sviluppo | In Italian | → Organizations and associations → Development |
| ISE | Istituto per lo Studio degli Ecosistemi | In Italian | → Environment, environmental sciences |
| ISE | Iniziative Sviluppo Energie | In Italian | → Energy economics |
| ISESAO | Istituto di Studi Economico-Sociali per l'Asia Orientale | In Italian | → Politics → Economics |
| ISIAO | Istituto Italiano per l'Africa el'Oriente | In Italian | |
| ISIAO | Istituto italiano per l'Africa e l'Oriente | In Italian | → Organizations and associations |
| ISIS | Istituto di Studi per l'Integrazione dei Sistemi | In Italian | → Mathematics and natural sciences |
| ISMB | Istituto Superiore Mario Boella | In Italian | |
| IsMEO | Istituto Italiano per il Medio ed Estremo Oriente | In Italian | → Area studies |
| ISPI | Istituto di Studi di Politica Internazionale | In Italian | → International relations |
| IST | Istituto Scientifico Tumori | In Italian | → Research institutes → Oncology |
| ISTAT | Istituto nazionale di statistica | In Italian | → Statistics |
| ISTI | Istituto di Scienza e Tecnologie dell'Informazione | In Italian | → Computer science → Telecommunications |
| IVA | Imposta sul Valore Aggiunto = TVA | Taxe sur la Valeur Ajoutée | In French = BTW | Belasting op Toegevoegde Waarde | In Afrikaans = IVA | Impost sobre el valor afegit | In Catalan = PDV | Porez na dodatu vrijednost | In Bosnian = ДДС | Данъкът върху добавената стойност | In Bulgarian = VAT | Value Added Tax | In English = AVI | Aldonvalora imposto | In Esperanto = ΦΠΑ | Φόρος Προστιθέμενης Αξίας | In Greek = DPH | Daň z přidané hodnoty | In Czech = Moms | Meromsætningsafgift | In Danish = IVA | Impuesto al Valor Agregado | In Spanish = MwSt | Mehrwertsteuer | In German = BTW | Belasting over de Toegevoegde Waarde | In Dutch = MVA | Merverdiavgift | In Norwegian = PVM | Pridėtinės vertės mokestis | In Lithuanian = VASK | Virðisaukaskattur | In Icelandic = PPN | Pajak Pertambahan Nilai | In Indonesian = Áfa | Általános forgalmi adó | In Hungarian = PDV | Porez na dodanu vrijednost | In Croatian = ALV | Arvonlisävero | In Finnish = מע"מ | מס ערך מוסף | In Hebrew = KDV | Katma Değer Vergisi | In Turkish = VAT | ภาษีมูลค่าเพิ่ม | In Thai = VAT | மதிப்புக் கூட்டு வரி | In Tamil = DPH | Daň z pridanej hodnoty | In Slovak = НДС | Налог на добавленную стоимость | In Russian = TVA | Taxa pe valoarea adăugată | In Romanian = IVA | Imposto sobre o Valor Acrescentado | In Portuguese = VAT | 增值税 | In Chinese |
In Italian | → Taxes, duties |
| K | Lisina = K | Lysine | In English = K | ليسين | In Arabic = K | লাইসিন | In Bengali = K | Lisina | In Catalan = K | Lysin | In Czech = K | Lysin | In German = K | Lisina | In Spanish = K | Lizino | LO = K | Lysine | In French = K | 리신 | In Korean = K | Lizin | In Croatian = K | Lisin | In Indonesian = K | ליזין | In Hebrew = K | Lizīns | In Latvian = K | Lysin | In Letzeburgesh = K | Lizinas | In Lithuanian = K | Lizin | In Hungarian = K | Lysine | In Dutch = K | リシン | In Japanese = K | Lizyna | In Polish = K | Lisina | In Portuguese = K | Лизин | In Russian = K | Lysiini | In Finnish = K | Lizin | In Turkish = K | Лізин | In Ukrainian = K | 赖氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| L | Leucina = L | Leucine | In English = L | Leucina | In Catalan = L | Leucin | In Danish = L | Leucin | In German = L | Leucina | In Spanish = L | Leŭcino | In Esperanto = L | Leucine | In French = L | 류신 | In Korean = L | Leucin | In Croatian = L | Leusin | In Indonesian = L | לאוצין | In Hebrew = L | Leicīns | In Latvian = L | Leucin | In Letzeburgesh = L | Leucinas | In Lithuanian = L | Leucine | In Dutch = L | ロイシン | In Japanese = L | Leucin | In Norwegian = L | Leucyna | In Polish = L | Leucina | In Portuguese = L | Лейцин | In Russian = L | Leusiini | In Finnish = L | Leucin | In Swedish = L | Lösin | In Turkish = L | Лейцин | In Ukrainian = L | 亮氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| Li | Litio = Li | Litium | In Afrikaans = Li | ليثيوم | In Arabic = Li | Litiu | In Asturian = Li | Літый | In Belarusian = Li | Литий | In Bulgarian = Li | লিথিয়াম | In Bengali = Li | Litijum | In Bosnian = Li | Liti | In Catalan = Li | Litiu | In Corsican = Li | Lithium | In Czech = Li | Лити | In Chuvash = Li | Lithiwm | In Welsh = Li | Lithium | In Danish = Li | Lithium | In German = Li | Λίθιο | In Greek = Li | Lithium | In English = Li | Litio | In Esperanto = Li | Litio | In Spanish = Li | Liitium | In Estonian = Li | Litio | In Basque = Li | لیتیوم | In Persian = Li | Litium | In Finnish = Li | Liti | In Friulian = Li | Litiam | In Irish = Li | Litio | In Galician = Li | ליתיום | In Hebrew = Li | लिथियम | In Hindi = Li | Litij | In Croatian = Li | Lityòm | HT = Li | Lítium | In Hungarian = Li | Լիթիում | In Armenian = Li | Litium | In Indonesian = Li | Litio | In Ido = Li | Litín | In Icelandic = Li | リチウム | In Japanese = Li | roksodna | JBO = Li | ლითიუმი | In Georgian = Li | 리튬 | In Korean = Li | Lithium | KSH = Li | Lîtyûm | In Kurdish = Li | Lithium | In Latin = Li | Lithium | In Letzeburgesh = Li | Litis | In Lithuanian = Li | Litijs | In Latvian = Li | Литиум | In Macedonian = Li | ലിഥിയം | In Malayalam = Li | Litium | In Malay = Li | Lithium | NDS = Li | Lithium | In Dutch = Li | Litium | In Nynorsk = Li | Litium | In Norwegian = Li | Liti | In Occitan = Li | Lit | In Polish = Li | Lítio | In Portuguese = Li | Lityu | In Quechua = Li | Litiu | In Romanian = Li | Литий | In Russian = Li | लिथियम | In Sanskrit = Li | Litij | In Serbo-Croatian = Li | Lítium | In Slovak = Li | Litij | In Slovenian = Li | Litiumi | SQ = Li | Литијум | In Serbian = Li | Litium | In Swedish = Li | Lithi | In Swahili = Li | லித்தியம் | In Tamil = Li | ลิเทียม | In Thai = Li | Lityum | In Turkish = Li | Літій | In Ukrainian = Li | Litiy | In Uzbek = Li | Liti | In Vietnamese = Li | Litiom | In Walloon = Li | ליטיום | In Yiddisch = Li | 锂 | In Chinese |
In Italian | → Chemistry |
| LICE | Lega Italiana Contro L'Epilessia (www.lice.it) | In Italian | → Organizations and associations → Neurology |
| LUCE | L'Unione Cinematografica Educativa | In Italian | → Organizations and associations → Cinema, movies |
| M | Metionina = M | Methionine | In English = M | Metionina | In Catalan = M | Methionin | In German = M | Metionina | In Spanish = M | Metionino | In Esperanto = M | Méthionine | In French = M | 메티오닌 | In Korean = M | Metionin | In Indonesian = M | Metionin | In Croatian = M | מתיונין | In Hebrew = M | Metionīns | In Latvian = M | Methionin | In Letzeburgesh = M | Metioninas | In Lithuanian = M | Methionine | In Dutch = M | メチオニン | In Japanese = M | Metionin | In Norwegian = M | Metionina | In Polish = M | Metionina | In Portuguese = M | Метионин | In Russian = M | Метионин | In Serbian = M | Metioniini | In Finnish = M | Metionin | In Swedish = M | Metiyonin | In Turkish = M | Метіонін | In Ukrainian = M | 蛋氨酸 | In Chinese |
In Italian | → Biochemistry, biophysics |
| MAC | Movimento Apostolico Ciechi | In Italian | → Organizations and associations → Christianity |
| MAGIS | Movimento e Azione dei Gesuiti Italiani per lo Sviluppo | In Italian | → Organizations and associations → Education → Development |
| MCE | Movimento di Cooperazione Educativa | In Italian | → Organizations and associations → Education |
| MIBAC | Ministero per i Beni e le Attività Culturali (www.beniculturali.it) | In Italian | → Central administration → Civilization, culture, progress |
| MIFED | Mercato Internazionale del Film e del Documentario | In Italian | → Cinema, movies |
| MLAL | Movimento Laici America Latina | In Italian | → Organizations and associations |
| MLFM | Movimento per la Lotta contro la Fame nel Mondo | In Italian | → Organizations and associations |
| MMI | Medicus Mundi Italia | In Italian | → Organizations and associations → Medicine |
| MmSAI | Memorie della Societa Astronomica Italiana | In Italian | → Serial publications, periodicals → Astronomy |
| MOCI | Movimento per la Cooperazione Internazionale | In Italian | → Organizations and associations → International relations |
| MSLC | Miscellanea di Studi di Letteratura Cristiana | In Italian | → Serial publications, periodicals → Christianity → Linguistics |
| MSP | Movimento Sviluppo e Pace | In Italian | → Organizations and associations → Development |
| N | Asparagina = N | Asparagine | In English = N | Asparagina | In Catalan = N | Asparagin | In German = N | Asparagina | In Spanish = N | Asparagino | In Esperanto = N | Asparagine | In French = N | 아스파라긴 | In Japanese = N | Asparagin | In Indonesian = N | אספרגין | In Hebrew = N | Asparagīns | In Latvian = N | Asparagin | In Letzeburgesh = N | Asparaginas | In Lithuanian = N | Asparagine | In Dutch = N | アスパラギン | In Japanese = N | Asparagina | In Polish = N | Asparagina | In Portuguese = N | Аспарагин | In Russian = N | Asparagín | In Slovak = N | Аспарагин | In Serbian = N | Asparagiini | In Finnish = N | Asparagin | In Swedish = N | Asparagin | In Turkish = N | Аспарагін | In Ukrainian = N | 天冬酰胺 | In Chinese |
In Italian | → Biochemistry, biophysics |
| N | Azoto = N | Azote | In French = N | Stikstof | In Afrikaans = N | نيتروجين | In Arabic = N | Nitróxenu | In Asturian = N | Azot | In Azerbaijani = N | Азот | In Belarusian = N | Азот | In Bulgarian = N | নাইট্রোজেন | In Bengali = N | Dušik | In Bosnian = N | Nitrogen | In Catalan = N | Azotu | In Corsican = N | Dusík | In Czech = N | Азот | In Chuvash = N | Nitrogen | In Welsh = N | Kvælstof | In Danish = N | Stickstoff | In German = N | Άζωτο | In Greek = N | Nitrogen | In English = N | Azoto | In Esperanto = N | Nitrógeno | In Spanish = N | Lämmastik | In Estonian = N | Nitrogeno | In Basque = N | نیتروژن | In Persian = N | Typpi | In Finnish = N | Azôt | In Friulian = N | Nítrigin | In Irish = N | Nitróxeno | In Galician = N | નાઇટ્રોજન | GU = N | Neetragien | GV = N | חנקן | In Hebrew = N | नाइट्रोजन | In Hindi = N | Dušik | In Croatian = N | Azòt | HT = N | Nitrogén | In Hungarian = N | Ազոտ | In Armenian = N | Nitrogeno | In Interlingua = N | Nitrogen | In Indonesian = N | Nitro | In Ido = N | Nitur | In Icelandic = N | 窒素 | In Japanese = N | trano | JBO = N | აზოტი | In Georgian = N | 질소 | In Korean = N | Stickstoff | KSH = N | Nîtrojen | In Kurdish = N | Nitrogenium | In Latin = N | Stéckstoff | In Letzeburgesh = N | Stikstof | LI = N | Azoti | In Lingala = N | Azotas | In Lithuanian = N | Slāpeklis | In Latvian = N | Hauota | In Māori = N | Азот | In Macedonian = N | നൈട്രജന് | In Malayalam = N | Азот | In Mongolian = N | नायट्रोजन | MR = N | Ehēcatehuiltic | En Nahuatl = N | Stickstoff | NDS = N | Stikstof | In Dutch = N | Nitrogen | In Nynorsk = N | Nitrogen | In Norwegian = N | Nitrogene | NOV = N | Azòt | In Occitan = N | Nitrogen | PAM = N | Azot | In Polish = N | Nitrogénio | In Portuguese = N | Qullpachaq | In Quechua = N | Azot | In Romanian = N | Азот | In Russian = N | Azzotu | In Sicilian = N | Dušik | In Serbo-Croatian = N | Dusík | In Slovak = N | Dušik | In Slovenian = N | Azoti | SQ = N | Азот | In Serbian = N | Kväve | In Swedish = N | Nitrojeni | In Swahili = N | நைட்ரஜன் | In Tamil = N | నత్రజని | TE = N | Азот | In Tajik = N | ไนโตรเจน | In Thai = N | Azot | In Turkish = N | Азот | In Ukrainian = N | Azot | In Uzbek = N | Nitơ | In Vietnamese = N | 氮 | In Chinese |
In Italian | → Chemistry |
| Na | Sodio = Na | Sodium | In French = Na | Natrium | In Afrikaans = Na | صوديوم | In Arabic = Na | Sodiu | In Asturian = Na | Натрый | In Belarusian = Na | Натрий | In Bulgarian = Na | সোডিয়াম | In Bengali = Na | Natrijum | In Bosnian = Na | Sodi | In Catalan = Na | Sodiu | In Corsican = Na | Sodík | In Czech = Na | Sodiwm | In Welsh = Na | Natrium | In Danish = Na | Natrium | In German = Na | ސޯޑިއަމް | DV = Na | Νάτριο | In Greek = Na | Sodium | In English = Na | Natrio | In Esperanto = Na | Sodio | In Spanish = Na | Naatrium | In Estonian = Na | Sodio | In Basque = Na | سدیم | In Persian = Na | Natrium | In Finnish = Na | Sodi | In Friulian = Na | Sóidiam | In Irish = Na | Sodio | In Galician = Na | Sodjum | GV = Na | נתרן | In Hebrew = Na | सोडियम | In Hindi = Na | Natrij | In Croatian = Na | Sodyòm | HT = Na | Nátrium | In Hungarian = Na | Նատրիում | In Armenian = Na | Natrium | In Indonesian = Na | Natro | In Ido = Na | Natrín | In Icelandic = Na | ナトリウム | In Japanese = Na | sodna | JBO = Na | Natrium | JV = Na | ნატრიუმი | In Georgian = Na | ಸೋಡಿಯಮ್ | KN = Na | 나트륨 | In Korean = Na | Natrîyûm | In Kurdish = Na | Natrium | In Latin = Na | Natrium | In Letzeburgesh = Na | Sodu | In Lingala = Na | Natris | In Lithuanian = Na | Nātrijs | In Latvian = Na | Konutai | In Māori = Na | Натриум | In Macedonian = Na | സോഡിയം | In Malayalam = Na | सोडियम | MR = Na | Natrium | NDS = Na | Natrium | In Dutch = Na | Natrium | In Nynorsk = Na | Natrium | In Norwegian = Na | Natrium | NOV = Na | Sôdgium | In Norman = Na | Sòdi | In Occitan = Na | Sód | In Polish = Na | Sódio | In Portuguese = Na | Natriyu | In Quechua = Na | Sodiu | In Romanian = Na | Натрий | In Russian = Na | Sodiu | In Sicilian = Na | Natrij | In Serbo-Croatian = Na | Sodík | In Slovak = Na | Natrij | In Slovenian = Na | Natriumi | SQ = Na | Натријум | In Serbian = Na | Natrium | In Swedish = Na | Natiri | In Swahili = Na | சோடியம் | In Tamil = Na | సోడియమ్ | TE = Na | Натрий | In Tajik = Na | โซเดียม | In Thai = Na | Sodyum | In Turkish = Na | Натрій | In Ukrainian = Na | Natriy | In Uzbek = Na | Natri | In Vietnamese = Na | Sodiom | In Walloon = Na | 钠 | In Chinese |
In Italian | → Chemistry |
| NapCo | Osservatorio Astronomico di Capodimonte Napoli - Contributi Astronomici | In Italian | → Serial publications, periodicals → Astronomy |
| NCimL | Lettere al Nuovo Cimento della Società Italiana di Fisica | In Italian | → Serial publications, periodicals → Physics |
| NIUNA | Napoli, Istituto Universitario Navale, Annali | In Italian | → Serial publications, periodicals → Astronomy |
| NUCT | Nuova Università del Cinema e della Televisione (www.nuct.com) | In Italian | → Higher education, universities → Cinema, movies → Telecommunications |
| O | Ossigeno = 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 | Oxígeno | In Spanish = 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 | 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 Italian | → Chemistry |
| OCSE | Organizzazione per la Cooperazione e lo Sviluppo Economico (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 = OCDE | Organización para la Cooperación y el Desarrollo Económico | In Spanish = 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 = 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 Italian | → International relations → International economic cooperation |
| OECE | Organizzazione Europea per la Cooperazione Economica = OECE | Organisation Européenne de Coopération Économique | In French = OEES | Organisasie vir Europese Ekonomiese Samewerking | In Afrikaans = ΟΕΟΣ | Οργανισμός Ευρωπαϊκής Οικονομικής Συνεργασίας | In Greek = OCEE | Organització per a la Cooperació Econòmica Europea | In Catalan = OEEC | Organisation for European Economic Co-operation | In English = OCEE | Organizaţia pentru Cooperare Economică Europeană | In Romanian = OECE | Organização para a Cooperação Económica Europeia | In Portuguese |
In Italian | → International relations → International economic cooperation |
| OLP | Organizzazione per la Liberazione della 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 | Organización para la Liberación de Palestina | In Spanish = 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 = 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 Italian | → Political parties and movements |
| OM | Oriente moderno | In Italian | |
| OMMI | Oblate Missionarie di Maria Immacolata = OMMI | Oblates Missionnaires de Marie Immaculée | In French = OMMI | Oblate Missionaries of Mary Immaculate | In English = OMMI | Oblatas Misioneras de Maria Inmaculada | In Spanish |
In Italian | → Roman catholic church |
| OMS | Organizzazione Mondiale della Sanità = MOS | Monda Organiz(aĵ)o pri Sano | In Esperanto = WHO | World Health Organization | In English = OMS | Organisation Mondiale de la Santé | In Esperanto = WGO | Wêreldgesondheidsorganisasie | In Afrikaans = OMS | Organización Mundial de la Salú | In Asturian = СЗО | Световната здравна огранизация | In Bulgarian = SZO | Světová zdravotnická organizace | In Czech = OMS | Organització Mundial de la Salut | In Catalan = OMS | Organización Mundial de la Salud | In Spanish = MTO | Maailma Terviseorganisatsioon | In Estonian = MOE | Munduko Osasun Erakundea | In Basque = OMS | Organisacion mondiâla de la sandât | 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 Italian | → United Nations → Medicine |
| OMT | Organizzazione Mondiale 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 | Organización Mundial del Turismo | In Spanish = OMT | Organizazion Mondiâl dal Turisim | In Friulian |
In Italian | → United Nations → Tourism |
| ONG | Organizzazione non governativa = 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 = LSM | Lembaga Swadaya Masyarakat | In Indonesian = ONG | Organización non gobernamental | In Galician = GKE | Gobernuz Kanpoko Erakunde | In Basque = ONG | Organización no gubernamental | In Spanish = 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 Italian | → Organizations and associations |
| ONLUS | Organizzazione non lucrativa di utilità sociale | In Italian | → Organizations and associations |
| ONU | Organizzazione delle Nazioni Unite (www.un.org) = 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 = KU | Kenedhlow Unys | In Cornish = ONU | Organització de les Nacions Unides | In Catalan = ΟΗΕ | Οργανισμός Ηνωμένων Εθνών | In Greek = ΗΕ | Ηνωμένα Έθνη | In Greek = ONU | Organización de las Naciones Unidas | In Spanish = 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 Italian | → International relations → United Nations |
| OPAM | Opera di Promozione dell'Alfabetizzazione nel Mondo | In Italian | → Organizations and associations → Education |
| OS | Operazione Sviluppo | In Italian | → Organizations and associations → Development |
| OSA | Operatori Spettacolo Associati | In Italian | |
| OSM | Obiettivi di Sviluppo del Millennio = OMD | Objectifs du Millénaire pour le Développement | In French = MDG | Millennium Development Goals | In German = TPM | Tujuan Pembangunan Milenium | In Indonesian = ODM | Objetivos de Desarrollo del Milenio | In Spanish = MDM | Metas de Desenvolvimento do Milênio | In Portuguese |
In Italian | → United Nations → Development |
| OSVIC | Organismo Sardo di Volontariato Internazionale Cristiano | In Italian | → Organizations and associations → Christianity |
| OVNI | Oggetto Volante Non Identificato = OVNI | Objet Volant Non Identifié | In French = OVNI | Objecte Volador No Identificat | In Catalan = НЛО | Неидентифициран летящ обект | In Bulgarian = OVNI | Objeto Volador No Identificado | In Spanish = UFO | Unidentifiziertes Flugobjekt | In German = UFO | Unidentified Flying Object | In English = UFO | Unknown Flying Object | In English = 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 = 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 Italian | → 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 | Prolina | In Spanish = P | Prolino | In Esperanto = P | Proline | In French = P | 프롤린 | In Korean = P | Prolin | In Croatian = P | Prolin | In Indonesian = 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 Italian | → Biochemistry, biophysics |
| PadCR | Osservatorio Astronomico di Padova - Comunicazioni e Rassegne | In Italian | → Serial publications, periodicals → Astronomy |
| PAM | Programma Alimentare Mondiale = 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 = PMA | Programa Mundial de Alimentos | In Spanish |
In Italian | → United Nations → 6123 → Agricultural sciences |
| PCUS | Partito Comunista dell'Unione Sovietica = PCUS | Parti Communiste de l'Union Soviétique | In French = SKUS | Strollad Komunour an Unaniezh Soviedel | In Breton = KPdSU | Kommunistische Partei der Sowjetunion | In German = KПCC | Коммунистическая партия Советского Союза | In Russian = KПCC | Kommunistitscheskaja Partija Sowjetskogo Sojusa | In Russian = KSSR | Komunistická strana Sovětského svazu | In Czech = KPSU | Komunisma Partio de Soveta Unio | In Esperanto = KPSU | Komunisma Partio de Soveta Unio | In Esperanto |
In Italian | → Political parties and movements |
| Punto Di Fraternità | In Italian | → Organizations and associations | |
| PE | Parlamento Europeo (www.europarl.europa.eu) = PE | Parlamento Europeo | In Spanish = 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 = 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 Italian | → Parliaments, representation → European Union |
| PESC | Politica Estera e di Sicurezza Comune = CFSP | Common Foreign and Security Policy | In English = GASP | Gemeinsame Außen- und Sicherheitspolitik | In German = WPZiB | Wspólna polityka zagraniczna i bezpieczeństwa | In Polish = PESC | Politique Étrangère et de Sécurité Commune | In French = GBVB | Gemeenschappelijk Buitenlands en Veiligheidsbeleid | In Dutch = SZPB | Společná zahraniční a bezpečnostní politika | In Czech = СЗБП | Спільна зовнішня та безпекова політика | In Ukrainian = SZPB | Spoločná zahraničná a bezpečnostná politika | In Slovak = PESC | Política Externa e de Segurança Comum | In Portuguese = FUSP | Felles utenriks- og sikkerhetspolitikk | In Norwegian |
In Italian | → European Union → International relations → Police |
| PI | Proprietà Industriale | In Italian | → Industrial property |
| PIA | Pacchetto Integrato di Agevolazioni | In Italian | |
| PICAI | Patronato Italo Canadese per l’Assistenza agli Immigrati | In Italian | → Organizations and associations → Migrations |
| PIL | Prodotto Interno Lordo = MEP | Malneta Enlanda Produkto | In Esperanto = GDP | Gross Domestic Product | In English = BKT | Bruttokansantuote | In Finnish = PIB | Producte Interior Brut | In Catalan = BNO | Bruto Nationoal Product | VLS |
In Italian | → Economics |
| PISAI | Pontificio Istituto di Studi Arabi ed'Islamistica | In Italian | → Roman catholic church → Islam → Area studies |
| POMil | Pubblicazioni dell'Osservatorio Astronomico di Milano-Merate | In Italian | → Serial publications, periodicals → Astronomy |
| PON | Programma Operativo Nazionale | In Italian | |
| POPad | Pubblicazioni dell'Osservatorio Astronomico di Padova | In Italian | → Serial publications, periodicals → Astronomy |
| POPal | Pubblicazioni dell'Osservatorio Astronomico di Palermo | In Italian | → Serial publications, periodicals → Astronomy |
| POTor | Pubblicazioni Varie Fuori Serie dell'Osservatorio Astronomico di Torino | In Italian | → Serial publications, periodicals → Astronomy |
| PSAIL | Pubblicazioni della Stazione Astronomica Internazionale di Latitudine | In Italian | → Serial publications, periodicals → Astronomy |
| PSE | Partito del Socialismo Europeo = PES | Party of European Socialists | In English = PES | Partia Europejskich Socjalistów | In Polish = PSE | Parti Socialiste Européen | In French = ESP | Europeiska socialdemokratiska partiet | In Swedish |
In Italian | → Political parties and movements |
| PUFir | Pubblicazioni della R. Universita degli studi di Firenze | In Italian | → Serial publications, periodicals → Astronomy |
| PVS | Paesi in via di sviluppo = PVD | Pays en Voie de Développement | In French |
In Italian | → Development → Geography |
| Q | Glutammina = Q | Glutamine | In English = Q | Glutamina | In Catalan = Q | Glutamin | In Czech = Q | Glutamin | In German = Q | Glutamina | In Spanish = Q | Glutamino | In Esperanto = Q | Glutamine | In French = Q | 글루타민 | In Korean = Q | Glutamin | In Indonesian = 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 Italian | → Biochemistry, biophysics |
| QSA | Quaderni di studi arabi | In Italian | → Serial publications, periodicals → Area studies |
| QUCC | Quaderni Urbinati di Cultura Classica | In Italian | → Serial publications, periodicals → Civilization, culture, progress → Language, linguistics, literature |
| R | Arginina = R | Arginine | In English = R | Arginina | In Catalan = R | Arginin | In Czech = R | Arginin | In German = R | Arginina | In Spanish = R | Arginino | In Esperanto = R | Arginine | In French = R | 아르기닌 | In Korean = R | Arginin | In Croatian = R | Arginin | In Indonesian = 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 Italian | → Biochemistry, biophysics |
| R&S | Ricerca e Sviluppo = R&D | Recherche et développement | In French = F&E | Forschung und Entwicklung | In German = R&D | Research and Development | In English = I+D | Investigación y Desarrollo | In Spanish = P&D | Pesquisa e Desenvolvimento | In Portuguese = O&O | Onderzoek en Ontwikkeling | In Dutch = FoU | Forsøk og Utvikling | In Norwegian |
In Italian | → Research policy → Engineering, technology |
| RA | Ricerche Astronomiche | In Italian | → Serial publications, periodicals → Astronomy |
| RAAN | Rendiconti dell'Accademia di Archeologia, Lettere e Belle Arti di Napoli | In Italian | → Arts → Literature → Archeology |
| RAI | Radiotelevisione Italiana | In Italian | → Telecommunications |
| RAI | Radio Audizioni Italiane | In Italian | → Telecommunications |
| RAL | Rendiconti dell'Accademia nazionale dei Lincei | In Italian | → Serial publications, periodicals |
| RC | Ricerca e Cooperazione | In Italian | → Organizations and associations → Research policy → International relations |
| RDT | Repubblica Democratica Tedesca = GDR | Germana Demokratia Respubliko | In Esperanto = RDA | Republik Demokratel Alamagn | In Breton = RDA | República Democrática Alemana | In Spanish = 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 = DDR | Duitse Democratische Republiek | In Dutch = RDG | Republica Democrată Germană | In Romanian = DAC | Demokratik Alman Cumhuriyeti | In Turkish |
In Italian | → Geography |
| RENAEL | Rete Nazionale Agenzie Energetiche Locali | In Italian | → Energy economics |