| Acronym | Sense | Language | Topics |
|---|---|---|---|
| OMU | Optical Measuring Unit | In English | → Optics |
| OMV | Orbital Maneuvering Vehicle | In English | → Astronautics |
| OMV | Oxygen Manual Valve | In English | |
| OMVG | Organisation pour la Mise en Valeur du fleuve Gambie | In French | → Organizations and associations → Development → 5023 → Engineering, technology |
| OMVS | Optically Variable Magnetic Stripe | In English | → Optics |
| OMVS | Organisation pour la Mise en Valeur du fleuve Sénégal | In French | → Organizations and associations → 337 → Development → Agricultural sciences |
| ON | Österreichisches Normungsinstitut (www.on-norm.at) | In German | → Organizations and associations → Standardization → Austria |
| ONA | Organizo por Nutrado kaj Agrikulturo = FAO | Food and Agriculture Organization | In English |
In Esperanto | → International relations → Agricultural sciences → Food technology |
| ONA | Observatorio Nacional Argentino | In Spanish | → Observatories → Argentina |
| ONA | Ontspanning Na Arbeid | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONAMA | Ontology of Narratives of the Middle Ages | In English | → Linguistics → History |
| ONB | Op Nije Begon'n | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONBAH | Office National des Barrages et des Aménagements Hydro-agricoles | In French | → Central administration → 627 → Agricultural sciences |
| ONBT | Orbiter Neutral Buoyancy Trainer | In English | → Astronautics |
| ONC | Office National de la Chasse | In French | → Central administration → Fishing, hunting |
| ONC | Organisme National de Certification | In French | → Standardization |
| ONCF | Office National des Chemins de Fer | In French | → Transport and postal services |
| OND | Observatoire National de la Délinquance | In French | → Sociology → Law, jurisprudence |
| OND | Operator Need Date | In English | |
| ONDO | Op Naar De Overwinning | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONDRP | Observatoire National de la Délinquance et des Réponses Pénales | In French | → Organizations and associations → Police → Criminal law → 3438 |
| ONE | Office National d'Électricité (www.one.org.ma) | In French | → Central administration → Electrical engineering → Morocco |
| ONE | Organisation Naturiste Européenne (www.onenaturism.com) | In English | → Organizations and associations |
| ONEP | Office National de l'Eau Potable | In French | → Organizations and associations → Environmental technology, water supply, waste management |
| ONEP | Office National d'Études et de Planification | In French | |
| ONERA | Office National d'Études et de Recherches Aéronautiques | In French | → Aeronautics, aircraft |
| ONERA | Office National d'Études et de Recherches Aérospatiales (www.onera.fr) | In French | → Research institutes → Aeronautics, aircraft → Astronautics → France |
| ONF | Office National des Forêts (www.onf.fr) | In French | → Central administration → Forestry → 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 | → Organizations and associations |
| ONG | Organizzazione non governativa = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Italian | → Organizations and associations |
| ONG | Organización non gobernamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Galician | → Organizations and associations |
| ONG | Organización no gubernamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Spanish | → Organizations and associations |
| ONG | Organització no governamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Catalan | → Organizations and associations |
| ONG | Organização não governamental = ONGs, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Portuguese | → Organizations and associations |
| ONGC | Oil and Natural Gas Corporation (www.ongcindia.com) | In English | → Earth sciences → Mining |
| ONGC | Office des Normes Générales du Canada | In English | → Standardization → Canada |
| ONGs | Organizações Não Governamentais = ONG, NGO, ANG, NRO, LSM, GKE, ΜΚΟ, NNO, ННО, NVO (look above) |
In Portuguese | → Organizations and associations |
| ONH | Organisme National Habilité | In French | |
| ONI | Ontspanning Na Inspanning | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONIAM | Office National d'Indemnisation des Accidents Médicaux (www.oniam.fr) | In French | → Central administration → Accidents, risks, safety → Medicine |
| ONIDOL | Organisation Nationale Interprofessionnelle Des Oléagineux | In French | → Organizations and associations → Agricultural sciences |
| ONISEP | Office National d'Information Sur les Enseignements et les Professions | In French | → Labour, labour economics → Education |
| ONISR | Observatoire National Interministériel de la Sécurité Routière | In French | → Central administration → Transport and postal services |
| ONIT | Onze Naam Is Telefoon | In Dutch | |
| ONLUS | Organizzazione non lucrativa di utilità sociale | In Italian | → Organizations and associations |
| ONO | Oostnoordoosten | In Dutch | |
| ONR | Office of Naval Research | In English | → Military engineering |
| ONR | Oranje Nassau Roden | In Dutch | → Organizations and associations → Sport, physical exercises |
| ÖNRAP | Österreichisches nationales Radonprojekt | In German | → Medicine → Austria |
| ONRAS | Occasional Notes of the Royal Astronomical Society | In English | → Serial publications, periodicals → Astronomy |
| ONREK | Office National de Recherche et d'Évaluation en Kinésithérapie | In French | → Medicine |
| ONS | Organisme National de Surveillance | In French | |
| ONS | Oranje Nassau Sportvereeniging | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONS | Oranje Nassau Sneek | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONS | Opérateur National de Sécurité | In French | → Accidents, risks, safety |
| ONT | Opeinde Nijega en De Tike | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONT | Office National du Tourisme | In French | → Central administration → Tourism |
| ONT | Optical Network Terminal | In English | → Networks, communication → Telecommunications |
| ONT | Ontario International Airport (https://www.flyontario.com) | In English | → Transport by air → Canada |
| ONTO | Ordre Nouveau des Templiers Opératifs | In French | → Modern spiritual movements |
| OntoUCP | Ontology based Unified Communication Protocol | In English | → Software → Networks, communication |
| OntoUCP | Ontology-based Unified Communication Protocol | In English | → Programming languages |
| ONU | Organisation des Nations Unies (www.un.org/french/) = UN | Unuigintaj Nacioj | In Esperanto = 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 = 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 | In Franco-Provençal = 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 | In Low German = 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 French | → International relations → United Nations |
| ONU | Organizazión d'as Nazions Unitas (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Aragonese | → International relations → United Nations |
| ONU | Organización de les Naciones Uníes (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Asturian | → International relations → United Nations |
| ONU | Organización das Nacións Unidas (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Occitan | → International relations → United Nations |
| ONU | Organizzazione delle Nazioni Unite (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Italian | → International relations → United Nations |
| ONU | Organització de les Nacions Unides (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Catalan | → International relations → United Nations |
| ONU | Organización de las Naciones Unidas (www.un.org/spanish/) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Spanish | → International relations → United Nations |
| ONU | Organisacion des Nacions unies (www.un.org) = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Franco-Provençal | → International relations → United Nations |
| ONU | Organizaţia Naţiunilor Unite = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Romanian | → International relations → United Nations |
| ONU | Organização das Nações Unidas = UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Portuguese | → International relations → United Nations |
| ONV | Op Nieuw Verenigd | In Dutch | → Organizations and associations → Sport, physical exercises |
| ONZ | Organizacja Narodów Zjednoczonych (www.un.org) = ONU, UN, ААН, VN, OOH, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Polish | → International relations → United Nations |
| ONZUS | Observatoire National des Zones Urbaines Sensibles | In French | → Regional planning |
| OÖ | Oberösterreich | In German | → Geography → Austria |
| OOD | Object-Oriented Design | In English | |
| OOD | Orbiter On Dock | In English | → Astronautics |
| OODP | Out-Of-Detent Pitch | In English | |
| OODR | Out-Of-Detent Roll | In English | |
| ÖOG | Österreichische Orient-Gesellschaft Hammer-Purgstall (www.orient-gesellschaft.at) | In German | → Organizations and associations → Area studies → Austria |
| OÖGKK | Oberösterreichische Gebietskrankenkassa (www.ooegkk.at) | In German | → Insurance → Medicine → Austria |
| OOH | Организацията на обединените нации (www.un.org) = ONU, UN, ААН, VN, ABU, ПНО, FN, NBE, CN, KU, ΟΗΕ, ООН, ONZ, BMT, LHiQ, OKB, OSN, OZN, УН, UM, ST, HN, PBB, NA, ÜRO, SÞ (look above) |
In Bulgarian | → International relations → United Nations |
| OOH | Orbital Operations Handbook | In English | → Astronautics |
| OOMM | Organizational Operations and Maintenance Manual | In English | → Maintenance and logistics |
| OOP | Over Optimization Penalty | In English | |
| OOP | Organizace pro osvobození Palestiny = 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 = 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 = 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 Czech | → Political parties and movements |
| OOPS | Fundamental'nye Osnovy Opticheskoi Pamiati i Sredy | In Russian | → Serial publications, periodicals → Mathematics and natural sciences |
| OOR | On-Orbit Review | In English | → Astronautics |
| OOS | On-Orbit Station | In English | → Astronautics |
| OOS | Orbit-to-Orbit Shuttle | In English | → Astronautics |
| OOS | Orbit-to-Orbit Stage | In English | → Astronautics |
| OOSD | On-Orbit Support Document | In English | → Astronautics |
| OOSD | Orbital Operations Support Document | In English | → Astronautics |
| OOSDP | On-Orbit Station Distribution Panel | In English | → Astronautics |
| OOSS | On-Orbit Support System | In English | → Astronautics |
| OP | Ouvrier Professionnel | In French | → Labour, labour economics |
| OP | Operating Procedure | In English | → Management |
| OP | Organisation de Producteur | In French | → Organizations and associations |
| OP | Ordre de Paiement | In French | → Prices → Accounting |
| OP | Orientation Professionnelle | In French | → Labour, labour economics |
| OP | Optional Protocol = PF | Protocole Facultatif | In French |
In English | → International law |
| OP&R | Operations Planning and Requirements | In English | → Management |
| OPA | Online Publishers Association (www.online-publishers.org) | In English | → Associations → Graphic industries, printing, publishing |
| OPA | Operations Planning Analysis | In English | → Management |
| OPA | Ontario Psychological Association (www.psych.on.ca) | In English | → Associations → Psychology → Canada |
| OPA | Océan PArallélisé | In French | → Marine research, oceanography |
| OPA | Other Procurement, Army | In English | → Military affairs |
| OPA | Offre Publique d'Achat | In French | → Economics |
| OPAC | Office Public d'Aménagement et de Construction | In French | → Public administration, government → Construction → Accommodation |
| OPAC | Online Public Access Catalog | In English | → Libraries |
| OPAH | Opération Programmée d'Amélioration de l'Habitat | In French | → Accommodation |
| OPALE | Outil de Pilotage et d'Aide à L'Expertise | In French | → Software |
| OPALE | Outil Probabiliste des ALimentations Électriques | In French | → Software → Electrical engineering |
| OPAM | Opera di Promozione dell'Alfabetizzazione nel Mondo | In Italian | → Organizations and associations → 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 | → Organizations and associations → International relations → Medicine |
| OPB | Oxidizer Preburner | In English | → Vehicle engineering |
| OPBS | Orbiter Payload Bay Simulator | In English | → Astronautics |
| OPC | Open Process Control | In English | → Data |
| OPC | Organisation pour la Prévention de la Cécité (www.opc.asso.fr) | In French | → Organizations and associations → Ophthalmology |
| OPC | Observatoire des Politiques Culturelles (www.observatoire-culture.net) | In French | → Organizations and associations → Politics → Civilization, culture, progress |
| OPC | Organisme de Placement Collectif | In French | → Finance |
| OPC | Office de la Protection du Consommateur (www.opc.gouv.qc.ca) | In French | → Central administration → Consumerism |
| OPC | Offre Préalable de Crédit | In French | → Banks |
| OPC | Optical Power Calibration | In English | → Optics |
| OPC | Opel Performance Center | In English | → Automobile manufacturing |
| OPC | Ordonnancement, Pilotage et Coordination | In French | → Civil engineering → Construction |
| OPC | OLE for Process Control | In English | → Networks, communication |
| OPC | Oligodendrocy Precursor Cell | In English | → Cytology |
| OPC | Organic Photo Conductor | In English | → Peripheral devices |
| OPC | Orthodox Presbyterian Church (www.opc.org) | In English | → Protestant churches |
| OPC | Optical Proximity Correction | In English | → Graphic industries, printing, publishing |
| OPC | Optimum Picture Control | In English | |
| OPCI | Organisme de Placement Collectif dédié à l'Immobilier | In French | → Finance |
| OPCP | Oficiul de Plăţi şi Contractare PHARE | In Romanian | |
| OPCs | Oligodendrocyte Progenitor Cells | In English | → 5763 |
| OPD | Optical Path Difference | In English | → Optics |
| OPDAR | Optical Detection and Ranging | In English | → Optics |
| OPDQ | Ordre Professionnel des Diététistes du Québec | In French | → Organizations and associations → Personal health and hygiene → Canada |
| OPDS | Organ on Politics, Defence and Security | In English | → International relations → Military affairs |
| OPE | Operational Processing Equipment | In English | |
| 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 | → Organizations and associations → Mining → 665 |
| OPEC | Organization of Petroleum Exporting Countries = OPEP, OPEL, ОПЕК (look above) |
In English | → Organizations and associations → Mining → 665 |
| OPECST | Office Parlementaire d'Évaluation des Choix Scientifiques et Technologiques | In French | → Parliaments, representation → Research policy → Engineering, technology |
| OPEIU | Office and Professional Employees International Union | In English | → Organizations and associations → Labour, labour economics |
| OPEL | Organizaĵo de Petrol-Eksportaj Landoj = OPEC, OPEP, ОПЕК (look above) |
In Esperanto | → Organizations and associations → Mining → 665 |
| OPEN | Organisation de Producteurs d'Énergie Nucléaire | In French | → Organizations and associations → Energy economics → Nuclear technology |
| OPEP | Organisation des Pays Exportateurs de Pétrole = OPEC, OPEL, ОПЕК (look above) |
In French | → Chemical technology → Mining → 665 |
| OPEP | Organização dos Países Exportadores de Petróleo = OPEC, OPEL, ОПЕК (look above) |
In Portuguese | → Organizations and associations → Mining → 665 |
| OPEP | Organización de Países Esportadores de Petroleu = OPEC, OPEL, ОПЕК (look above) |
In Asturian | → Organizations and associations → Mining → 665 |
| OPEP | Organización de Países Exportadores de Petróleo = OPEC, OPEL, ОПЕК (look above) |
In Spanish | → Organizations and associations → Mining → 665 |
| OPEP | Organització de Països Exportadors de Petroli = OPEC, OPEL, ОПЕК (look above) |
In Catalan | → Organizations and associations → Mining → 665 |
| OPERA | Observatoire PErmanent de la RAdioactivité | In French | → Organizations and associations → Nuclear technology |
| OPESH | Observatoire de la Pauvreté et de l'Exclusion Sociale en Haïti | In French | → Organizations and associations → Social welfare |
| OPEX | OPerational Expenditure | In English | → Accounting |
| OPF | Orbiter Processing Facility | In English | → Astronautics |
| OPG | Osteoprotegrin | In German | → Biochemistry, biophysics |
| OPG | Objectif Projet Groupe | In French | → Management |
| ÖPG | Österreichische Physikalische Gesellschaft (www.oepg.at) | In German | → Organizations and associations → Physics → Austria |
| OPGC | Observatoire de Physique du Globe de Clermont-Ferrand (wwwobs.univ-bpclermont.fr) | In French | → Research institutes → Geophysics → France |
| OPGL | Osteoprotegerin Ligand | In English | → Biochemistry, biophysics |
| OPhL | Optique Philippe Lafont | In French | → Optics |
| OPI | Objectif Projet Individuel | In French | → Management |
| OPI | Operations Procedure Instruction | In English | → Management |
| OPI | Orbiter Payload Interrogator | In English | → Astronautics |
| OPI | Ośrodek Przetwarzania Informacji (www.opi.org.pl) | In Polish | → Research policy → Poland |
| OPI | Office du Périmètre d'Irrigation | In French | → Public administration, government → Agricultural sciences |
| OPIC | Office de la Propriété Intellectuelle du Canada (www.opic.ic.gc.ca) | In French | → Central administration → Artistic property |
| OPID | Observatório da Profissão de Informação-Documentação | In Portuguese | → Libraries |
| OPIDF | Operational Planning Identification File | In English | → Files → Management |
| OPIP | Office de Promotion des Investissements Privés | In French | → 33972 |
| OPIPA | Organisasi untuk Penyelidikan dalam Ilmu Pengetahuan Alam | In Indonesian | |
| OPIPA | Organisatie voor Natuurwetenschappelijk Onderzoek | In Dutch | → Research institutes → Research policy → Indonesia |
| OPIS | Orbiter Prime Item Specification | In English | → Astronautics |
| OPJ | Officier de Police Judiciaire | In French | → Police |
| OPK | Ovulation Predictor Kit | In English | → Gynaecology → Reproductive biology |
| OPL | Open Problem List | In English | |
| OPL | Orbiter Project Parts List | In English | → Astronautics |
| OPL | Open Proxy List | In English | → Software → Networks, communication |
| OPLF | Orbiter Processing and Landing Facility | In English | → Astronautics |
| OPM | Operations Procedure Manual | In English | → Management |
| OPM | Outer Planet Mission | In English | → Astronomy → Astronautics |
| OPM | Office of Personnel Management | In English | → Personnel management |
| OPML | Outline Processor Markup Language | In English | → Programming languages |
| OPN | Osteopontin | In English | → Biochemistry, biophysics |
| OPO | Orbiter Project Office | In English | → Astronautics |
| OPO | Offre à Prix Ouvert | In French | → Economics |
| OPOV | Oxidizer Preburner Oxidizer Valve | In English | → Vehicle engineering |
| OPP | Organizacje Pożytku Publicznego (http://opp.ms.gov.pl) | In Polish | → Organizations and associations → Poland |
| OPPAR | Orbiter Project Parts Authorization Request | In English | → Astronautics |
| OPPBTP | Organisme Professionnel de la Prévention du Bâtiment Travaux Publics | In French | → Organizations and associations → Civil engineering → Construction |
| OPPBTP | Organisme Professionnel de Prévention du Bâtiment et des Travaux Publics (www.oppbtp.fr) | In French | → Organizations and associations → 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 | → Organizations and associations → Construction → Civil engineering |
| OPPF | Oxford Protein Production Facility | In English | → Biotechnology → Proteins |
| OPPS | Operations Planning and Project Support | In English | → Management |
| OPPS | Observatoire Paritaire du Portage Salarial | In French | → Labour, labour economics |
| OPPTIC | Organisation de Professionnels pour la Promotion des TIC en région Languedoc-Roussillon | In French | → Networks, communication → Organizations and associations → Telecommunications |
| OPQCM | Office Professionnel de Qualification des Conseils en Management | In French | → Consulting |
| OPR | Office of Primary Responsibility | In English | → Management |
| OPR | Operations Planning Review | In English | → Management |