| Acronym | Sense | Language | Topics |
|---|---|---|---|
| ONEP | Office National de l'Eau Potable | In French | → Environmental technology, water supply, waste management |
| ONERA | Office National d'Études et de Recherches Aérospatiales (www.onera.fr) | In French | → Research institutes → Aeronautics, aircraft → Astronautics → France |
| ONG | Organisation Non Gouvernementale = ONGs | Organizações Não Governamentais | In Portuguese = NGO | Non-Governmental Organization | In English = NGO | Nichtregierungsorganisation | In German = ANG | Aozadur Nann-Gouarnamantel | In Breton = 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 = 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 French | |
| ONG | Organizzazione non governativa = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Italian | |
| ONG | Organización non gobernamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Galician | |
| ONG | Organización no gubernamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Spanish | |
| ONG | Organització no governamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Catalan | |
| ONG | Organização não governamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Portuguese | |
| ONGs | Organizações Não Governamentais = ONG, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Portuguese | |
| ONI | Ontspanning Na Inspanning | In Dutch | → Sport, physical exercises |
| ONIDOL | Organisation Nationale Interprofessionnelle Des Oléagineux | In French | → Agricultural sciences |
| ONLUS | Organizzazione non lucrativa di utilità sociale | In Italian | |
| ONR | Oranje Nassau Roden | In Dutch | → Sport, physical exercises |
| ONS | Oranje Nassau Sportvereeniging | In Dutch | → Sport, physical exercises |
| ONS | Oranje Nassau Sneek | In Dutch | → Sport, physical exercises |
| ONT | Opeinde Nijega en De Tike | In Dutch | → Sport, physical exercises |
| ONV | Op Nieuw Verenigd | In Dutch | → Sport, physical exercises |
| ÖOG | Österreichische Orient-Gesellschaft Hammer-Purgstall (www.orient-gesellschaft.at) | In German | → Area studies → Austria |
| OP | Organisation de Producteur | In French | |
| OPA | Online Publishers Association (www.online-publishers.org) | In English | → Associations → Graphic industries, printing, publishing |
| OPA | Ontario Psychological Association (www.psych.on.ca) | In English | → Associations → Psychology → Canada |
| OPAM | Opera di Promozione dell'Alfabetizzazione nel Mondo | In Italian | → Education |
| OPAS | Organização Pan-Americana da Saúde (www.paho.org) = OPS | Organización Panamericana de la Salud | In Spanish = PAHO | Pan American Health Organization | In English |
In Portuguese | → International relations → Medicine |
| OPC | Organisation pour la Prévention de la Cécité (www.opc.asso.fr) | In French | → Ophthalmology |
| OPC | Observatoire des Politiques Culturelles (www.observatoire-culture.net) | In French | → Politics → Civilization, culture, progress |
| OPDQ | Ordre Professionnel des Diététistes du Québec | In French | → Personal health and hygiene → Canada |
| OPEC | Organization of the Petroleum Exporting Countries = 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 | Organización de Países Exportadores de Petróleo | In Spanish = OPEP | Organització de Països Exportadors de Petroli | In Catalan = ОПЕК | Организација на земји извознички на нафта и нафтени деривати | In Macedonian |
In English | → Mining → 665 |
| OPEC | Organization of Petroleum Exporting Countries = OPEP, OPEL, ОПЕК (look above) |
In English | → Mining → 665 |
| OPEIU | Office and Professional Employees International Union | In English | → Labour, labour economics |
| OPEL | Organizaĵo de Petrol-Eksportaj Landoj = OPEC, OPEP, ОПЕК (look above) |
In Esperanto | → Mining → 665 |
| OPEN | Organisation de Producteurs d'Énergie Nucléaire | In French | → Energy economics → Nuclear technology |
| OPEP | Organização dos Países Exportadores de Petróleo = OPEC, OPEL, ОПЕК (look above) |
In Portuguese | → Mining → 665 |
| OPEP | Organización de Países Esportadores de Petroleu = OPEC, OPEL, ОПЕК (look above) |
In Asturian | → Mining → 665 |
| OPEP | Organización de Países Exportadores de Petróleo = OPEC, OPEL, ОПЕК (look above) |
In Spanish | → Mining → 665 |
| OPEP | Organització de Països Exportadors de Petroli = OPEC, OPEL, ОПЕК (look above) |
In Catalan | → Mining → 665 |
| OPERA | Observatoire PErmanent de la RAdioactivité | In French | → Nuclear technology |
| OPESH | Observatoire de la Pauvreté et de l'Exclusion Sociale en Haïti | In French | → Social welfare |
| ÖPG | Österreichische Physikalische Gesellschaft (www.oepg.at) | In German | → Physics → Austria |
| OPGC | Observatoire de Physique du Globe de Clermont-Ferrand (wwwobs.univ-bpclermont.fr) | In French | → Research institutes → Geophysics → France |
| OPIPA | Organisatie voor Natuurwetenschappelijk Onderzoek | In Dutch | → Research institutes → Research policy → Indonesia |
| OPP | Organizacje Pożytku Publicznego (http://opp.ms.gov.pl) | In Polish | → Poland |
| OPPBTP | Organisme Professionnel de la Prévention du Bâtiment Travaux Publics | In French | → Civil engineering → Construction |
| OPPBTP | Organisme Professionnel de Prévention du Bâtiment et des Travaux Publics (www.oppbtp.fr) | In French | → Labour, labour economics → Medicine → Civil engineering → Construction → France |
| OPPBTP | Organisme Professionnel de la Prévention du Bâtiment et des Travaux Publics (www.oppbtp.fr) | In French | → Construction → Civil engineering |
| OPPTIC | Organisation de Professionnels pour la Promotion des TIC en région Languedoc-Roussillon | In French | → Networks, communication → Telecommunications |
| OPRI | Office de Protection contre les Rayonnements Ionisants (www.opri.fr) | In French | → Nuclear technology |
| OPS | Organización Panamericana de la Salud (www.paho.org) = OPAS, PAHO (look above) |
In Spanish | → International relations → Medicine |
| OPTILE | Organisation Professionnelle des Transports d'Île-de-France | In French | → Transport and postal services → France |
| OPWC | Organisation for the Prohibition of Chemical Weapons (www.opcw.org) = OIAC | Organisation pour l'Interdiction des Armes Chimiques | In French |
In English | → International relations → Military engineering |
| OQLF | Office Québécois de la Langue Française (www.oqlf.gouv.qc.ca) | In French | → Dictionaries → Linguistics → Canada |
| ORA | Organisation Révolutionnaire Anarchiste | In French | → Anarchist organizations |
| ORAP | Organisation Associative du Parallélisme | In French | → Computer science |
| OREF | Observatoire Régional de l'Emploi et de la Formation | In French | → Labour, labour economics → Education |
| ORF | Observer Research Foundation | In English | → Foundations |
| ORFEUS | Observatories and Research Facilities for EUropean Seismology (http://orfeus.knmi.nl) | In English | → Research institutes → Seismology, earthquakes → Netherlands |
| ÖRG | Österreichische Röntgengesellschaft (www.oerg.at) | In German | → Medicine → Austria |
| ORI | Ocean Research Institute (www.ori.u-tokyo.ac.jp) | In English | → Research institutes → Marine research, oceanography → Japan |
| ÖRK | Österreichische Rektorenkonferenz (www.reko.ac.at) | In German | → Higher education, universities → Austria |
| ORM | Observatoire Régional des Métiers | In French | → Labour, labour economics |
| ORPHEM | Organisation Régionale des Pharmaciens Hospitaliers de l'Est Méditerranéen | In French | → Pharmacology, toxicology |
| ORRCA | Ontario Research Centre for Computer Algebra (www.orcca.on.ca) | In English | → Research institutes → Algebra → Computer science → Canada |
| ÖRV | Österreichischer Rodel-Verband (www.rodel-austria.at) | In German | → Austria |
| OS | Operazione Sviluppo | In Italian | → Development |
| OS3B | Open Software Blanc Bleu Belge | In French | → Software → Belgium |
| OSA | Oklahoma Sociological Association | In English | → Associations → Sociology → United States |
| OSA | Ordo Sancti Augustini | In Latin | → Christianity |
| OSALL | Organisation of South African Law Libraries | In English | → Libraries → Law, jurisprudence → Africa |
| OSB | Ordo Sancti Benedicti | In Latin | → Christianity |
| OSC | Ookmeer Schinkelhaven Combinatie | In Dutch | → Sport, physical exercises |
| OSC | Olstse Sport Club | In Dutch | → Sport, physical exercises |
| OSC | Oosterhoutse Sport Club | In Dutch | → Sport, physical exercises |
| OSC | Orthense Sport Club | In Dutch | → Sport, physical exercises |
| OSCI | Organisation des Opérateurs Spécialisés du Commerce International | In French | → Trade |
| OSCIP | Organização da Sociedade Civil de Interesse Público | In Portuguese | |
| OSDO | Ons Samenspel Doet Overwinnen | In Dutch | → Sport, physical exercises |
| OSE | Oeuvre de Secours aux Enfants | In French | → Politics |
| OSERA | Ohio Scientific Education & Research Association (www.osera.org) | In English | → Associations → Education → Research policy → United States |
| OSF | Open Software Foundation | In English | → Foundations → Software |
| ÖSFK | Österreichisches Studienzentrum für Frieden und Konfliktlösung (www.aspr.ac.at) | In German | → Research institutes → Polemology → Austria |
| ÖSFO | Ökosoziales Forum Österreich (www.oesfo.at) | In German | → 5023 → Social sciences → Austria |
| ÖSG | Österreichische Schmerzgesellschaft (www.oesg.at) | In German | → Pathology → Austria |
| OSGi | Open Services Gateway initiative (www.osgi.org) | In English | → Software |
| OSI | Österreichisches Ost- und Südosteuropa-Institut (www.osi.ac.at) | In German | → Research institutes → Area studies → Austria |
| OSI | Onze Sport Inspireert | In Dutch | → Sport, physical exercises |
| OSIEK | Organiza Societo de Internaciaj Esperanto-Konferencoj | In Esperanto | → Congresses → Artificial languages (linguistics) |
| OSIM | Open Source In Morocco | In English | → Software → Morocco |
| OSIRIS | Observatoire des Systèmes d'Informations, des Réseaux et des Inforoutes au Sénégal (www.osiris.sn) | In French | → Software → Networks, communication → Telecommunications |
| OSM | Omni Sportvereniging Maarssenbroek | In Dutch | → Sport, physical exercises |
| OSO | Omroep Sport Organisatie | In Dutch | → Sport, physical exercises |
| OSPG | Österreichisch-Südpazifische Gesellschaft (www.univie.ac.at/ospg/) | In German | → Austria |
| OSR | Oberster Sanitätsrat | In German | → Public health and hygiene |
| OSS | Oefening Staalt Spieren | In Dutch | → Sport, physical exercises |
| OSSA | Oxfordshire School Sports Association | In English | → Associations → Sport, physical exercises |
| OSV | Oostzaanse Sport Vereniging | In Dutch | → Sport, physical exercises |
| OSV | Overdinkelse Sport Vereniging | In Dutch | → Sport, physical exercises |
| OSVIC | Organismo Sardo di Volontariato Internazionale Cristiano | In Italian | → Christianity |
| OT | Ordo Teutonicus | In Latin | → Christianity |
| ÖTI | Österreichisches Textil-Forschungsinstitut (www.oeti.at) | In German | → Research institutes → Textile industry → Austria |
| ÖTK | Österreichischer Touristenklub (www.oetk.at) | In German | → Tourism → Austria |
| OTL | Ordnance Test Laboratory | In English | → Research institutes |
| ÖVA | Osterreichischer Verein für Altlastenmanagement (www.altlastenmanagement.at) | In German | → Environmental protection → Threats to the environment → Austria |
| OVB | Organisatie ter Verbetering van de Binnenvisserij | In Dutch | |
| OVC | Ommense Voetbal Club | In Dutch | → Football and rugby |
| OVC | Oijense Voetbal Club | In Dutch | → Football and rugby |
| OVC | Oosterbeekse Voetbal Club | In Dutch | → Football and rugby |
| OVCS | Ophovense Voetbal Club Sittard | In Dutch | → Football and rugby |
| ÖVE | Österreichischer Verband für Elektrotechnik (www.ove.at) | In German | → Electronics → Austria |
| ÖVG | Österreichische Verkehrswissenschaftlichen Gesellschaft (www.oevg.at) | In German | → Transport and postal services → Austria |
| OVH | Ontspannings Vereniging Hercules | In Dutch | → Sport, physical exercises |
| ÖVI | Österreichischer Verband der Immobilientreuhänder (www.ovi.at) | In German | → Accommodation → Austria |
| ÖVK | Österreichischer Verein für Kraftfahrzeugtechnik (www.övk.at) | In German | → Mechanical engineering → Austria |
| OVM | Oudervereniging voor de Moraal | In Dutch | |
| ÖVN | Österreichischer Verein für Navigation (www.ovn.at) = AIN | Austrian Institute of Navigation | In English |
In German | → Geodesy, cartography → Transport and postal services → Austria |
| ÖVSV | Österreichischer Versuchssenderverband | In German | → Telecommunications → Austria |
| ÖVV | Österreichischer Volleyball Verband (www.volleynet.at) | In French | → 7963 → Austria |
| OVV | Oostvoornse Voetbal Vereniging | In Dutch | → Football and rugby |
| OVV | Oosteinder Voetbal Vereniging | In Dutch | → Football and rugby → Netherlands |
| OVV | Overlegcentrum van Vlaamse Verenigingen | In Dutch | → Belgium |
| OVVO | Op Volharding Volgt Overwinning | In Dutch | → Sport, physical exercises |
| ÖWA | Österreichische Webanalyse (www.oewa.at) | In German | → Internet → Austria |
| ÖWAV | Österreichischer Wasser- und Abfallwirtschaftsverband (www.oewav.at) | In German | → Environmental technology, water supply, waste management → Austria |
| ÖWiG | Österreischische Wissenschaftsgesellschaft (www.oewig.at) | In German | → Research policy → Austria |
| OWIOS | Over Winnen Is Ons Streven | In Dutch | → Sport, physical exercises |
| OWL | Ostwestfalen-Darts-Liga | In German | → Sport, physical exercises |
| OYCF | Overseas Young Chinese Forum | In English | → China |
| OZC | ODIS Zorgvlied Combinatie | In Dutch | → Sport, physical exercises |
| OZC | Ommer Zaterdag Club | In Dutch | → Sport, physical exercises |
| OZK | Oranje Zwart Kromhout | In Dutch | → Sport, physical exercises |
| OZOD | Overwinnen Zij Ons Doel | In Dutch | → Sport, physical exercises |
| OZW | Oud Zwart Wit | In Dutch | → Sport, physical exercises |
| PA | Parapsychological Association (www.parapsych.org) | In English | → Associations → Psychology → Occult sciences |
| PAAF | Property Appraisers Association of Florida (www.paaf.net) | In English | → Associations → 332 → United States |
| PAAR | Professional Association of Andrologists of Russia | In English | → Associations → Sexual problems → Urology → Russia |
| PAC | Progres - Afrikaander Boys Combinatie | In Dutch | → Sport, physical exercises |
| PADA | Professional Autograph Dealers Association (www.padaweb.org) | In English | → Associations → Trade |
| PAF | Pinellas Animal Foundation (www.vetsforpets.org) | In English | → Foundations → Veterinary medicine |
| PAHA | Polish American Historical Association | In English | → Associations → History → United States |
| PAHO | Pan American Health Organization (www.paho.org) = OPAS, OPS (look above) |
In English | → International relations → Medicine |
| PAKBO | Pakistan Bibliographical Organization | In English | → Bibliography → Libraries → Pakistan |
| PakEsA | Pakistana Esperanto-Asocio | In Esperanto | → Associations → Artificial languages (linguistics) → Pakistan |
| PALH | Physician Assistant for Latino Health | In English | → Medicine → International relations |
| PAM | Psychological Association of Manitoba | In English | → Associations → Psychology → Canada |
| PAMA | Professional Audio Manufacturers Alliance (www.pamalliance.org) | In English | → Music → Acoustical engineering |
| PAN | Polska Akademia Nauk (www.pan.pl) | In Polish | → Academies → Mathematics and natural sciences → Poland |
| PAPEI | Psychological Association of Prince Edward Island | In English | → Associations → Psychology → Canada |
| PAPG | Peer Assessment Permanent Group | In English | |
| PAPG | Pakistan Association of Petroleum Geoscientists | In English | → Associations → Earth sciences → Pakistan |
| PARC | Palo Alto Research Center (www.parc.com) | In English | → Research institutes → Computer science |
| PAS | Percussive Arts Society | In English | → Music |
| PASC | Pacific Area Standards Congress | In English | → Congresses → Standardization |
| PAT | Phi Alpha Theta | In English | |
| PATH | Partners for Advanced Transit and Higways | In English | → Transport and postal services |
| PAU | Polska Akademia Umiejętności (www.pau.krakow.pl) | In Polish | → Academies → Poland |
| PauLLA | Pau Logiciels Libres Association | In French | → Associations → Software → Operating systems |
| PAVC | Pseudomonas Aeruginosa Vaccine Consortium | In English | → Immunology and allergy |
| PAVE | Profession Architecture, Ville et Environnement | In French | → Research institutes → Regional planning → Architecture |
| PBS | Pfadibewegung Schweiz (www.pbs.ch) | In German | → Switzerland |
| PCA | Popular Culture Association | In English | → Associations → Civilization, culture, progress |
| PCA | Portland Cement Association | In English | → Associations → Construction |
| PCA | Polskie Centrum Aluminium (http://pca.org.pl) | In Polish | → Research institutes → Metallurgy → Poland |
| PCCS | Pontificium Consilium de Comunicationibus Socialibus = PCSC | Pontifical Council for Social Communications | In English |
In Latin | → Roman catholic church |
| PCH | Poney Club de La Houssaye | In French | → Sport, physical exercises |
| PCL | Permanente Commissie voor Leerlingenzorg | In Dutch | → Education |
| PCMCIA | Personal Computer Memory Card International Association | In English | → Associations → Memories |
| PCR | Projet Collectif de Recherche | In French | → Research policy |
| PCSC | Pontifical Council for Social Communications = PCCS (look above) |
In English | → Roman catholic church |
| Punto Di Fraternità | In Italian | ||
| PDK | Promotie Door Krachtsinspanning | In Dutch | → Sport, physical exercises |
| PDL | Product Development Laboratory | In English | → Research institutes |
| PDO | Private Development Organization | In English | → Development |
| PDSA | People's Dispensary for Sick Animals | In English | → Veterinary medicine |
| PEC | Post Energie Combinatie | In Dutch | → Sport, physical exercises |
| PEEP | Parents d'Élève de l'Enseignement Public (www.peep.asso.fr) | In French | → Education → France |
| PEIPRB | Prince Edward Island Psychologists Registration Board | In English | → Psychology → Canada |
| PEJ | Portugala Esperanto-Junularo | In Esperanto | → Associations → Artificial languages (linguistics) → Portugal |
| PEJ | Pola Esperanto-Junularo | In Esperanto | → Artificial languages (linguistics) |
| PEM | Por-Esperanta Mormonaro | In Esperanto | → Christianity → Artificial languages (linguistics) |
| PEP | Pôle Européen de Plasturgie | In French | → Plastic industry |
| PERB | Public Employment Relations Board | In English | → Labour, labour economics → Personnel management |
| PFC | Puttense Football Club | In Dutch | → Football and rugby |
| PFIL | Plate-Forme d'Initiative Locale | In English | → Economics |
| PFIL | Plate-Forme d'Initiative Locale | In French | → Economics |
| PFL | Propulsion Field Laboratory | In English | → Research institutes → Aeronautics, aircraft → Astronautics |
| PGA | Producer's Guild of America (www.producersguild.org) | In English | → Cinema, movies → United States |
| PGEM | Provinciale Gelderse Electriciteits Maatschappij | In Dutch | → Sport, physical exercises → Electrical engineering |
| PGS | Personeelsvereniging Gemeente Secretarie | In Dutch | |
| PH | Partioheraldikot | In Finnish | → Genealogy → Flags, banners |
| PHS | Peace History Society | In English | → History |
| PhyG | Physikalische Gesellschaft | In German | → Physics |
| PhyGZ | Physikalische Gesellschaft Zürich | In German | → Physics |
| PIALA | Pacific Islands Association of Libraries and Archives | In English | → Associations → Libraries |
| PICAI | Patronato Italo Canadese per l'Assistenza agli Immigrati | In Italian | → Migrations |
| PICW | The President's Interagency Council on Women | In English | → Feminism |
| PIIA | Pakistan Institute of International Affairs | In English | → International relations → Pakistan |
| PIJAC | Pet Industry Joint Advisory Council | In English | |
| PIMEC | Petita i Mitjana Empresa de Cataluña | In Spanish | → 33846 → Spain |
| PIPSA | Pacific Islands Political Studies Association | In English | → Associations → Politics |
| PJC | Pekelder Boys Jupiter Combinatie | In Dutch | → Sport, physical exercises |
| PKC | Peizerweg Kring Combinatie | In Dutch | → Sport, physical exercises |
| PKiM | Pracowni Komet i Meteorów (http://hwww.pkim.org) | In Polish | → Interplanetary medium → Poland |