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- OathPersonal affirmation of a statement
- Oath of allegianceIndividual oath to a state
- Oath of citizenshipOath taken by immigrants for naturalization
- Oath of officeOfficial promise by a person in a public office to lawfully fulfill its duties
- OberdöblingOberdöbling (Central Bavarian: Obadöbling) was an independent municipality until 1892 and
- Objection (United States law)Formal protest raised in court during a trial
- ObjectivismPhilosophical system developed by Ayn Rand
- Objectivism and libertarianismPhilosophical interactions
- ObscenityAct or statement that offends the morality of the period
- Obstruction of justice in the United StatesCrime consisting of obstructing prosecutors, investigators, or other officials
- Occupational injuryBodily damage resulting from working
- Offence against the personCrime that typically involves force or harm upon the person of another
- Offender profilingLaw enforcement investigative technique
- Offensive (military)Type of military operation
- Offer and acceptanceComponents of a legally-binding contract
- Office for International Military Cooperation of the Central Military CommissionChinese military office
- Office for Reform and Organizational StructureAgency of the People's Republic of China
- Office for Safeguarding National SecurityThe Office for Safeguarding National Security of the Central People's Government of the Pe
- Office of the General Secretary of the Chinese Communist PartyThe Office of the General Secretary of the Central Committee of the Chinese Communist Part
- Office of the President of ChinaThe Office of the President of the People's Republic of China (Chinese: 中华人民共和国主席办公室) is a
- Office of the United Nations High Commissioner for Human RightsUN Secretariat department that promotes human rights under international law
- Office-holders of CanadaThis is a list of leaders and office-holders of Canada. See also Canadian incumbents by ye
- OfficegateOfficegate was a political scandal in Scotland surrounding the unregistered expenses of th
- Officer of armsAn officer of arms is a person appointed by a sovereign or state with authority to perform
- Official development assistanceType of international aid
- Official party statusCanadian political practice
- Offshore bankBank located outside the country of residence of the depositor
- Offshore financial centreCorporate-focused tax havens
- Offshore LeaksDisclosure of tax haven client data in 2013
- Offshore magic circleMulti-jurisdictional tax haven law firms
- OffshoringTransnational relocation of operations
- OGSMGoal setting and action plan framework
- OIC Committee of Permanent RepresentativesThe Committee of Permanent Representatives is created by article 13 of the new Charter of
- Oil warTerm used for any conflict about petroleum resources
- OligopolyMarket dominated by a small number of sellers
- Ollanta HumalaPresident of Peru from 2011 to 2016
- OmbudsmanOfficial representing the interests of the public
- On-the-job trainingForm of workplace training
- One Big Union (concept)The One Big Union is an idea originating in the late 19th and early 20th centuries amongst
- One ChinaPolicy of only recognizing one state of China
- One Divides into TwoIdeological debate in China in 1964
- One hundred leiThe one hundred lei banknote is one of the circulating denomination of the Romanian leu. I
- One leuThe current one leu banknote is the smallest circulating denomination af the Romanian leu.
- One man, one votePolitical slogan
- One World Youth ProjectYouth organization
- One-party stateState where only one party may form a government
- One-satang coinThe Thailand one-satang coin is a currency unit equivalent to one-hundredth of a Thai baht
- OneworldAirline alliance headquartered in Fort Worth, Texas, United States
- Online advertisingForm of advertising that uses the Internet
- Online shoppingForm of electronic commerce
- Open listPersonalized list proportional voting system
- Open prisonPrison where the detainees serve their sentences with minimal supervision
- Open societyPolitical term coined by Henri Bergson in 1932
- Open Society FoundationsGrantmaking network founded by George Soros
- Open-pit miningSurface mining technique
- Operation BolívarOperation Bolívar was the codename for the German espionage in Latin America during World
- Operation Cross CheckOperation Cross Check is an ongoing law enforcement operation led by the U.S. Immigration
- Operation EllamyOperation Ellamy was the codename for the United Kingdom participation in the 2011 militar
- Operation Inherent ResolveMilitary intervention against the Islamic State of Iraq and the Levant
- Operational level of warBetween strategic and tactical warfare
- Operational objectiveIn business, operational objectives (also known as tactical objectives) are short-term goa
- Operations managementIn business operations, controlling the process of production of goods
- Operations management for servicesConcept in service organisations
- Opportunity costBenefit lost by a choice between options
- Opposition (politics)Political force against the political force in charge of the government
- Opposition to devolution in the United KingdomPolitical debate in the UK
- Oppression remedyConcept in corporate law
- Opt-outs in the European UnionEU regulations which are not imposed by member states by agreement
- Optimal capital income taxationSubarea of optimal tax theory
- Optimal taxDesign and implementation of tax policy maximizing social welfare
- Option (finance)Right to buy or sell a certain thing at a later date at an agreed price
- Option contractAn option contract, or simply option, is defined as "a promise which meets the requirement
- Option for the poorCatholic social teaching on the well-being of the poor
- Oracle CorporationAmerican multinational computer corporation
- Oral democracyForm of government
- Orangism (Belgium)Political movement in 19th-century Belgium
- Orangism (Dutch Republic)Supporters of the Princes of Orange
- OrbanismPolitical ideology of Viktor Orbán
- Order of battleOrganized description of an armed force
- Order of precedenceSequential hierarchy of nominal importance of persons
- Order of Prohibited LegitimacyThe Order of Prohibited Legitimacy (Italian: Ordine di Vietata Legittimità/Spanish: Orden
- Order of successionSequence of people entitled to hold a high office if it is vacated
- Order of the FounderIn 1917, five years after the death of the founder of the Salvation Army William Booth, hi
- Order of the GarterBritish order of chivalry
- Ordered libertyFreedom limited by the need for social order
- OrdoliberalismGerman political philosophy
- ÖreÖre (Swedish pronunciation: ) is the centesimal subdivision of the Swedish krona. In the S
- Orestes Pursued by the FuriesOrestes Pursued by the Furies is an event from Greek mythology that is a recurring theme i
- Organic growthBusiness growth based on output and customer increases
- Organic lawFoundational law
- Organic statute (United States)In United States administrative law, an organic statute is a statute enacted by Congress t
- Organisation of African UnityAfrican international body (1963–2002)
- Organisation of Islamic CooperationInternational organisation
- Organization Department of the Chinese Communist PartyHuman resources management department
- Organization of the Black Sea Economic CooperationInternational organization
- Organizational architectureProcedural structure of an organization
- Organizational communicationField of study in communication studies
- Organizational cultureCustomary behaviours in an organization
- Organizational engineeringOrganizational engineering (OE) is a form of organizational development. It was created by
- Organizational patternsOrganizational patterns are inspired in large part by the principles of the software patte
- Organizational spaceOrganizational space, sometimes called organizational architecture, describes the influenc
- Organizational structureWay in which an organization is structured
- Original jurisdictionPower of a court to hear a court case that has not been appealed by a different court
- OrléanistFrench monarchist faction in support of the House of Orléans
- Orphan workCopyright-protected work for which rightsholders are positively indeterminate
- Ortho PharmaceuticalOrtho Pharmaceutical was initially formed in the United States in 1931 as a subsidiary of
- Orthodox TrotskyismMarxist political ideology
- Osagie ObasogieOsagie Kingsley Obasogie (born August 21, 1977) is a law professor and bioethicist at UC B
- OSS SocietyVeterans of US WWII intelligence service
- Ostend (Frankfurt am Main)Ostend is a quarter of Frankfurt am Main, Germany. It is part of the Ortsbezirk Innenstadt
- OstracismDemocratic procedure for expelling citizens
- Osvaldo Zavala GilerOsvaldo Zavala Giler (born 1978/1979) is an Ecuadorian jurist. He has been the registrar o
- Otto FlugmaschinenfabrikGustav Otto Flugmaschinenfabrik was a pioneering German aircraft producer during the early
- Our Culture, What's Left of ItOur Culture, What's Left of It: The Mandarins and the Masses is a 2005 non-fiction book by
- Our RevolutionAmerican progressive political organization
- Ouster clauseType of clause in legislation
- Outer Space TreatyBasis of international space law
- OutlawPerson declared as outside the protection of the law
- Outlaw motorcycle clubMotorcycle subculture
- Outpost (military)Location where detachments are stationed
- Output (economics)Quantity or quality of goods or services produced in a given time period
- OutsourcingContracting internal tasks to an external organization
- Over-the-counter (finance)Trading done directly between two parties
- OverlordLord of a tenant
- OvermatchMilitary concept of achieving overwhelming advantage
- Overnight rateInterest rate of overnight loans between banks
- Overseas Chinese Affairs CommitteeCommittee of the National People's Congress in People's Republic of China
- Overseas Chinese Affairs OfficeBureau within the United Front Work Department of the Chinese Communist Party
- OvertimeOvertime is the amount of time someone works beyond normal working hours. The term is also
- Overtime banType of strike action
- Overwhelming exceptionAn overwhelming exception is an informal fallacy of generalization. It is a generalization
- OverworkExcessive work
- OwenismUtopian socialist philosophy
- OxfamCharitable humanitarian organization
- ÖzalismEconomic & social views and political style of Turgut Özal in Turkey