Prolegomena, fundamentals of knowledge and culture, propaedeutics.
| Acronym | Sense | Language | Topics | 
|---|---|---|---|
| NVM | Nonvolatile Memory | In English | → Memories | 
| NVN | Netwerk van netwerken | In Dutch | → Networks, communication | 
| NVPHBV | Nederlandse Vereniging voor Patroonherkenning en Beeldverwerking | In Dutch | → Organizations and associations → Graphical processing → Image processing → Netherlands  | 
| NWP | Numerical Weather Prediction | In English | → Computer simulation → Meteorology, climatology  | 
| NWR | Natuurwetenschappelijke Raad voor Nederlandsch-Indië | In Dutch | → Organizations and associations → Research policy → Indonesia  | 
| NYCCS | New York Center for Computational Science | In English | → Computer science → Numerical analysis → United States  | 
| NYSCEDII | New York State Center for Engineering Design and Industrial Innovations (www.nyscedii.buffalo.edu) | In English | → Organizations and associations → Research policy → Engineering, technology → Drawing and applied arts → United States  | 
| O&O | Onderzoek en Ontwikkeling = 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 = R&S | Ricerca e Sviluppo | In Italian = P&D | Pesquisa e Desenvolvimento | In Portuguese = FoU | Forsøk og Utvikling | In Norwegian  | 
In Dutch | → Research policy → Engineering, technology  | 
| OAHTS | Orbiter Avionics Hardware Tracking System | In English | → Software → Computer hardware → Aeronautics, aircraft → 6297  | 
| OALC | Ogden Air Logistics Center | In English | → Maintenance and logistics → Aeronautics, aircraft  | 
| OAMI | Office of Academic Multicultural Initiatives (www.oami.umich.edu) | In English | → Higher education, universities → Civilization, culture, progress  | 
| OAR | Organization for Asian Research | In English | → Organizations and associations → Research policy  | 
| OASCB | Orbiter Avionics Software Control Board | In English | → Software → Aeronautics, aircraft → Astronautics  | 
| OASIS | Organisation for the Advancement of Structural Information Standard | In English | → Organizations and associations → Standardization → Data → Networks, communication  | 
| OASIS | Orbit Avionics Software Integration Study | In English | → Software → Aeronautics, aircraft  | 
| OASIS | Objets Actifs, Sémantique, Internet et Sécurité | In French | → Software → Internet → Semiotics  | 
| OASIS | Outil d'Accès Simplifié à l'Information du Système | In French | → Software | 
| OAT | Operational Acceptance Test | In English | → Quality management | 
| OBC | On-Board Computer | In English | → Computer hardware | 
| OBCP | On-Board Computer Program | In English | → Computer programs | 
| OCA | Oracle Certifiate Associate | In English | → Software → Data  | 
| OCA | Open Content Alliance | In English | → Organizations and associations → Computer science  | 
| OCALC | Oklahoma City Air Logistics Center | In English | → Maintenance and logistics → Aeronautics, aircraft → United States  | 
| OCCP | Orbit Command Computer Program | In English | → Computer programs → Astronautics  | 
| OCDU | Optics Coupling Data Unit | In English | → Data → Optics  | 
| OCEAN | Organisation Centralisée pour l'Exploitation de l'Administration des services Lotus Notes | In French | → Software | 
| OCF | On-Board Computational Facility | In English | → Computer science | 
| OCF | Orbiter Computational Facilities | In English | → Computer hardware → Astronautics  | 
| ÖCG | Österreichische Computer Gesellschaft (www.ocg.at) | In German | → Organizations and associations → Computer science → Austria  | 
| OCH | Orbiter Common Hardware | In English | → Computer hardware → Astronautics  | 
| OCLC | Online Computer Library Center | In English | → Libraries → Networks, communication  | 
| OCM | Oracle Certified Master | In English | → Software → Data  | 
| OCML | Operational Conceptual Modelling Language | In English | → Programming languages | 
| OCP | Oracle Certified Professional | In English | → Software → Data  | 
| OCR | Optical Character Reader | In English | → Writing systems → Computer-based techniques  | 
| OCTAVE | Operationally Critical Threat, and Vulnerability Evaluation | In English | → Computer science | 
| ODA | Open Document Architecture | In English | → Computer science | 
| ODB | Operational Data Base | In English | → Data | 
| ODBC | Open Data Base Connectivity | In English | → Data | 
| ODBC | Open Database Connectivity | In French | → Software → Data  | 
| ODBMS | Object-Oriented Database Management System | In English | → Data | 
| ODDL | On-Board Digital Data Load | In English | → Data | 
| ODDP | Object-Dependent Data Processor | In English | → Computer hardware → Data  | 
| ODE | Open Dynamics Engine (www.ode.org) | In English | → Software → Image processing → Computer simulation  | 
| ODE | Orchestration Director Engine | In English | → Software | 
| ODF | Open Document Format | In English | → Data → Document processing  | 
| ODF | Output Data Formatter | In English | → Software → Data  | 
| ODMG | Object Database Management Group | In English | → Organizations and associations → Data  | 
| ÖDOZA | Österreichisches Dokumentationszentrum für Auslandsstudien | In German | → Documentation → Education → Austria  | 
| ODR | Output Data Redundancy | In English | → Data | 
| ODRC | Orbiter Data Reduction Center | In English | → Data → Astronautics  | 
| ODU | Output Display Unit | In English | → Human-computer interaction | 
| ÖEK | Österreichisches Elektrotechnisches Komitee | In German | → Standardization → Electrical engineering → Austria  | 
| OESI | Oficina del Español en la Sociedad de la Información (http://oesi.cervantes.es) | In Spanish | → Organizations and associations → Linguistics → Computer science  | 
| OF | Ordre de Fabrication | In French | → Maintenance and logistics | 
| ÖFAI | Österreichisches Forschungsinstitut für Artificial Intelligence (www.ofai.at) | In German | → Research institutes → Artificial intelligence → Austria  | 
| OFC | Open Financial Connectivity | In English | → Data → 3336  | 
| OFDM | Orthogonal Frequency Division Multiplexing | In English | → Networks, communication → Telecommunications  | 
| OFDM | Orthogonal Frequency-Division Multiplexing | In English | → Computer science → Telecommunications  | 
| OFDS | Orbiter Flight Dynamic Simulator | In English | → Computer simulation → Astronautics  | 
| OFES | OGCM for the Earth Simulator | In English | → Marine research, oceanography → Computer simulation  | 
| ÖFG | Österreichische Forschungsgemeinschaft (www.oefg.at) | In German | → Research institutes → Research policy → Austria  | 
| OFT | Orbital Flight Test | In English | → Quality management → Astronautics  | 
| OFTDS | Orbital Flight Test Data System | In English | → Data → Astronautics  | 
| OFX | Open Financial Exchange | In English | → Data → 3336  | 
| OGC | Open Geospatial Consortium | In English | → Organizations and associations → Computer science → Geodesy, cartography  | 
| ÖGIG | Österreichische Gesellschaft für Informatikgeschichte (www.oegig.at) | In German | → Organizations and associations → History → Computer science → Austria  | 
| OGMT | Orbiter Greenwich Mean Time | In English | → Standardization → Astronautics  | 
| OGo | OpenGroupware.org (www.opengroupware.org) | In English | → Software | 
| OGOPA | Outil de Gestion Opérationnelle des Produits et Activités | In French | → Software → Management  | 
| OGP | Organisation et Gestion de la Production | In French | → Management | 
| OI | Ordinateur Individuel | In French | → Serial publications, periodicals → Computer science  | 
| OI | Olimpiada Informatyczna | In Polish | → Computer science | 
| OIA | Orbiter Interface Adapter | In English | → Human-computer interaction → Astronautics  | 
| ÖIE | Österreichischer Informationsdienst für Entwicklungspolitik | In German | → Documentation → Development → Austria  | 
| OIL | Ontology Inference Layer | In English | → Software → Artificial intelligence → Semiotics  | 
| OIML | Organisation Internationale de Métrologie Légale | In French | → Organizations and associations → Standardization  | 
| OIR | Office of Information Resources | In English | → Documentation | 
| OISC | One Instruction Set Computer | In English | → Computer hardware | 
| OIT | Orbiter Interface Test | In English | → Human-computer interaction → Astronautics  | 
| OIVS | Orbiter Interface Verification Set | In English | → Human-computer interaction → Astronautics  | 
| OKBC | Open Knowledge Base Connectivity | In English | → Computer science | 
| OLAP | On Line Analytical Processing | In English | → Knowledge management → Data  | 
| OLDB | On-Line Data Bank | In English | → Data | 
| OLE | Object Linking and Embedding | In English | → Software | 
| OLE | Object Linking and Embedment | In English | → Computer-based techniques | 
| OLERD | Orbiter Landing Emergency Rescue Data | In English | → Data → Astronautics  | 
| OLIMP | Outil Local d'Information pour la Maîtrise des Produits dangereux | In French | → Software | 
| OLPC | One Laptop Per Child | In English | → Computer hardware | 
| OLTP | On Line Transaction Processing | In English | → Data | 
| OMA | Operations Maintenance Area | In English | → Maintenance and logistics | 
| OMA | Operations Management Application | In English | → Management | 
| OMA | Orbiter Maintenance Area | In English | → Maintenance and logistics → Astronautics  | 
| OMA | Object Management Architecture | In English | → Management | 
| OMA | Operation and Maintenance, Army | In English | → Maintenance and logistics → Military affairs  | 
| OMAR | Operation and Maintenance, Army Reserve | In English | → Maintenance and logistics → Military affairs  | 
| OMARNG | Operation and Maintenance, Army National Guard | In English | → Maintenance and logistics → Military affairs  | 
| OMAS | Operations Management Application Software | In English | → Software → Management  | 
| OMB | Office of Management and Budget | In English | → Management | 
| OMC | Office of Medical Computing | In English | → Computer science → Medicine  | 
| OMCF | Operations and Maintenance Control File | In English | → Maintenance and logistics | 
| OMCF | Orbiter Maintenance and Checkout Facility | In English | → Maintenance and logistics → Astronautics  | 
| OMCS | Operations and Maintenance Communications System | In English | → Maintenance and logistics → Telecommunications  | 
| OMD | Operations and Maintenance Documentation | In English | → Maintenance and logistics | 
| OMDP | Orbiter Maintenance Down Period | In English | → Maintenance and logistics → Astronautics  | 
| OMDR | Operations and Maintenance Data Record | In English | → Records management → Maintenance and logistics  | 
| OMEGA | Outil pour les Mutuelles des Électriciens et GAziers | In French | → Software → Insurance → Energy economics → Electrical engineering  | 
| OMEWG | Orbiter Maintenance Engineering Working Group | In English | → Maintenance and logistics → Astronautics  | 
| OMG | Object Management Group | In English | → Organizations and associations → Software  | 
| OMGA | Operations Management Ground Application | In English | → Management | 
| OMI | Operations and Maintenance Instruction | In English | → Maintenance and logistics | 
| OMIJC | Operations and Maintenance Instruction Job Card | In English | → Maintenance and logistics | 
| OMISS | Operation and Maintenance Instruction Summary Sheet | In English | → Maintenance and logistics | 
| OML | Open Methodology License | In English | → Artistic property → Computer science  | 
| OMMH | Orbiter Maintenance Man-Hour | In English | → Maintenance and logistics → Astronautics  | 
| OMNSH | Observatoire des Mondes Numériques en Sciences Humaines (www.omnsh.org) | In French | → Organizations and associations → Computer science → Social sciences  | 
| OMP | Operating Maintenance Plan | In English | → Maintenance and logistics | 
| OMP | Operations and Maintenance Plan | In English | → Maintenance and logistics | 
| OMPF | Official Military Personnel File | In English | → Personnel management → Military affairs  | 
| OMPR | Operational Maintainability Problem Reporting | In English | → Maintenance and logistics | 
| OMR | Optical Mark Recognition | In English | → Writing systems → Computer-based techniques  | 
| OMR | Operations and Maintenance Requirement | In English | → Maintenance and logistics | 
| OMR | Operations Management Room | In English | → Management | 
| OMR | Orbiter Management Review | In English | → Management → Astronautics  | 
| OMRC | Operational Maintenance Requirements Catalog | In English | → Maintenance and logistics | 
| OMRF | Orbiter Maintenance and Refurbishment Facility | In English | → Maintenance and logistics → Astronautics  | 
| OMRF | Orbiter Modification and Refurbishment Facility | In English | → Maintenance and logistics → Astronautics  | 
| OMRP | Operations and Maintenance Requirements Plan | In English | → Maintenance and logistics | 
| OMRS | Operations and Maintenance Requirements and Specifications | In English | → Maintenance and logistics | 
| OMRS | Operations and Maintenance Requirements System | In English | → Maintenance and logistics | 
| OMRSCB | Operations and Maintenance Requirements and Control Board | In English | → Maintenance and logistics | 
| OMRSD | Operations and Maintenance Requirements and Specifications Document | In English | → Maintenance and logistics | 
| OMS | Operations Management System | In English | → Management | 
| OMSP | Operational Maintenance Support Plan | In English | → Management | 
| OMT | Object-Modeling Technique | In English | → Software | 
| ON | Österreichisches Normungsinstitut (www.on-norm.at) | In German | → Organizations and associations → Standardization → Austria  | 
| ONC | Organisme National de Certification | In French | → Standardization | 
| ONGC | Office des Normes Générales du Canada | In English | → Standardization → Canada  | 
| ONT | Optical Network Terminal | In English | → Networks, communication → Telecommunications  | 
| OntoUCP | Ontology based Unified Communication Protocol | In English | → Software → Networks, communication  | 
| OntoUCP | Ontology-based Unified Communication Protocol | In English | → Programming languages | 
| OOMM | Organizational Operations and Maintenance Manual | In English | → Maintenance and logistics | 
| OP | Operating Procedure | In English | → Management | 
| OP&R | Operations Planning and Requirements | In English | → Management | 
| OPA | Operations Planning Analysis | In English | → Management | 
| OPALE | Outil de Pilotage et d'Aide à L'Expertise | In French | → Software | 
| OPALE | Outil Probabiliste des ALimentations Électriques | In French | → Software → Electrical engineering  | 
| OPC | Open Process Control | In English | → Data | 
| OPC | Observatoire des Politiques Culturelles (www.observatoire-culture.net) | In French | → Organizations and associations → Politics → Civilization, culture, progress  | 
| OPC | OLE for Process Control | In English | → Networks, communication | 
| OPC | Organic Photo Conductor | In English | → Peripheral devices | 
| OPECST | Office Parlementaire d'Évaluation des Choix Scientifiques et Technologiques | In French | → Parliaments, representation → Research policy → Engineering, technology  | 
| OPG | Objectif Projet Groupe | In French | → Management | 
| OPI | Objectif Projet Individuel | In French | → Management | 
| OPI | Operations Procedure Instruction | In English | → Management | 
| OPI | Ośrodek Przetwarzania Informacji (www.opi.org.pl) | In Polish | → Research policy → Poland  | 
| OPIDF | Operational Planning Identification File | In English | → Files → Management  | 
| OPIPA | Organisatie voor Natuurwetenschappelijk Onderzoek | In Dutch | → Research institutes → Research policy → Indonesia  | 
| OPL | Open Proxy List | In English | → Software → Networks, communication  | 
| OPM | Operations Procedure Manual | In English | → Management | 
| OPM | Office of Personnel Management | In English | → Personnel management | 
| OPML | Outline Processor Markup Language | In English | → Programming languages | 
| OPPS | Operations Planning and Project Support | In English | → Management | 
| OPPTIC | Organisation de Professionnels pour la Promotion des TIC en région Languedoc-Roussillon | In French | → Networks, communication → Organizations and associations → Telecommunications  | 
| OPR | Office of Primary Responsibility | In English | → Management | 
| OPR | Operations Planning Review | In English | → Management | 
| OPS | Operational Sequence | In English | → Management | 
| OPSA | OSSTMM Professional Security Analyst | In English | → Computer science | 
| OPSDB | Operations Data Base | In English | → Data | 
| OPSDBA | Operations Data Base Administrator | In English | → Data → Management  | 
| OPSE | OSSTMM Professional Security Expert | In English | → Computer science | 
| OPSIS | Observation et Prospective sur la Société de l'Information et ses Services | In French | → Computer science → Telecommunications  | 
| OPST | OSSTMM Professional Security Tester | In English | → Computer science | 
| OQL | Object Query Language | In English | → Programming languages → Data  | 
| ORA | Operational Requirements Analysis | In English | → Management | 
| ORAM | Output Random Access Memory | In English | → Memories | 
| ORAP | Organisation Associative du Parallélisme | In French | → Organizations and associations → Computer science  | 
| ORB | Object Request Broker | In English | → Networks, communication | 
| ORB | Operations Review Board | In English | → Management | 
| ORC | Optical Character Recognition = ROC | Reconnaissance Optique de Caractères | In French  | 
In English | → Writing systems → Computer-based techniques  | 
| ORCADE | Outil de Reporting, de Consolidation et d'Aide à la DÉcision | In French | → Software → Management  | 
| ORCHIDEE | ORdonnancement des CHaînes Informatiques Dirigées par les Événements et les Enchaînements | In French | → Software | 
| ORCHIS | Oak Ridge Computerized Hierarchical Information System | In English | → Computer science → Knowledge management  | 
| ORD | Operations Requirements Document | In English | → Management | 
| ORDBMS | Object-Relational Database Management System | In English | → Data | 
| ORDI | Ontology Representation and Data Integration | In English | → Software | 
| ORGUE | Outils de Réorganisation de la Gestion Unifiée des Entités | In French | → Software | 
| ORI | Operational Readiness Inspection | In English | → Management | 
| ORIC | ORganisation Informatique Comptable | In French | → Computer science → Accounting  | 
| ORIENT | Oriental Research Infrastructure to European Networks | In English | → Research policy → International relations  | 
| ORIS | Office of Research and Information Systems | In English | → Knowledge management | 
| ORLA | Optimum Repair Level Analysis | In English | → Maintenance and logistics | 
| ÖRPE | Österreichische Referenzzentrum zur Erfassung und Dokumentation von menschlichen Prionenerkrankungen | In German | → Documentation → Pathology → Austria  | 
| ORR | Operational Readiness Review | In English | → Management | 
| ORR | Operations Requirements Review | In English | → Management | 
| ORRCA | Ontario Research Centre for Computer Algebra (www.orcca.on.ca) | In English | → Research institutes → Algebra → Computer science → Canada  | 
| ORSDI | Oak Ridge Selective Dissemination of Information | In English | → Computer science → Knowledge management  | 
| ORT | Operational Readiness Test | In English | → Management | 
| OS | Operating Software | In English | → Software | 
| OS | Operating System | In English | → Operating systems |