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What does A/O stand for?

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Rank Abbr.Meaning
AOAnnouncement of Opportunity
AOAnarchy Online (internet game)
AOAngola
AOAdaptive Optics
AOAdjustable Objective (rifle telescopic sight)
AOOrder of Australia
AOAdults Only (ESRB game rating, 18 yrs. and up; graphic sex/violence)
A/OAt Once
AOAdministrative Order
AOAccount Of
AOAdvisory Opinion
AOAosta (Val d'Aosta, Italy)
AOAnd Others
AOAnarchy-Online (PC MMORPG)
AOAmong Others
AOAgent Orange (herbicidal warfare)
AOAnalog Output
AOOther Articles (US postal service)
AOApplied Optics
AOOfficer of the Order of Australia
AOAtlantic Ocean
AOAmerican Optical
AOAdults Only
AOAbgabenordnung (German tax regulations)
A/OAs Of
AOArctic Ocean
AOAge Old
AOArctic Oscillation
AOAtmosphere-Ocean
AOArea of Operation
AOArea Office
AOArchives of Ontario
AOAustralian Airlines (IATA airline code)
AOAudit Office
AOAnti-Oxidant
AOAcridine Orange
AOAntiOnline (computer security website)
AOAbort Output (TELNET protocol)
AOArgentum Online
AOAuthorizing Official (for IMPAC Purchases)
AOArbeitsgemeinschaft für Osteosynthesefragen (Association for the Study of Internal Fixation)
AOAction Oriented
AOAlexander Ovechkin (hockey player)
AOAutonomous Okrug
AOAdministration Officer
A/OAnalog Output
AOAtomic Oxygen
AOAdmit One
AOAction Officer
AOAcademy of Osseointegration
AOApplication Object
AOAutres Objets (Canada universal postal union)
AOAmerican Outlaws (soccer fan group)
A/OArea of Operations
AOAircraft Operator
AOAmbleside Online (homeschool curriculum)
AOAtomic Orbital
AOOperational Availability
AOAmphibious Operation
AOAccounts Office
AOAtlas Orthogonal (chiropractic technique; also seen as AOT)
AOAviation Officer
AOAnglicans Online
AOAfrique Orientale (German East Africa)
AOActive Optical
AOAccount Owner
AOAir Officer
AOAir Operation
AOAppeals Office(r)
AOAuslandsorganisation (foreign section of NSdAP)
AOOffice of the Administrator
AOAcousto Optics
AOAerial Observer
AOAnswers Only (educational testing)
AOAtlanto-Occipital (joint)
A/OAlert and Oriented (charting a patient's mental status)
AOAmerican Outfitters (store)
AOAutomated Office
AOAlpha et Omega (epigraphy)
AOAuxiliary Oiler (Ship Type)
AOAdvanced Organization (Church of Scientology)
AOAccess Opening
AOFly Outs (baseball statistic)
AOAutomated Operations
AOAmbulance Officer (ambulance service; chiefly Australian)
AOAir Observer
AOAtualidades Ornitológicas (Ivaiporã-PR, Brazil)
AOAcquisition Objective
AOAssociated Object
AOAtomic Operation
AOAaron Owens (streetball player)
AOAnnotated Outline
AOAthlitikos Omilos (Greek: Athletic Club)
AOAssignment Officer
AOAsylum Officer (US DHS)
AOAssociate Office
AOAssembly Order
AOAbnormal Occurrence
AOAtelosteogenesis
A/OAcoustic/Optic (spectroscopy)
AOAccredited Organization
AOAssisted Opener (type of knife)
AOAttendees Only
AOAccommodation Officer
AOAccess Ordering
AOAuxiliary Operator (nuclear industry)
AOAnodal Opening
A/OAccounting Only
AOAutomags Online
AOAttack Objective
AOAssisted Operations
AOAcronym Overload
AOAortagram
AOApostolic Oblates
AOAsia Onlus (Rome, Italy)
AOAirdrome Officer
AOAdministrative Office/ Officer
AOAssociate Post Office (also called associate office)
AOAssociation Orukutuku
AOAwards and Obligations
AOAeronautical Orders (orders authorizing a military person to perform duties in flight)
AOAerosol Obscurant
AOACCS (Army Command and Control System) OSI (Operator System Interface)
AOAccompanying Object
AOAir Overseas, Inc.
AOArkansas and Ozarks Railway
AOApproximate Optimum Method
AO(USN Rating) Aviation Ordnanceman
AOAuthorized Outage
AOAdaptive Onestep (IEEE)
A/OAtomic Weight Percent
AOAbdominal Obesity
AOAll Out
AOAviation Ordnance Person (US DoD)
AOAustralian Open (tennis tournament)
AOAuthentic Orginal (retail)
AOApplication Outsourcing
AOAnnoying Orange (Youtube channel)
AOAssessing Officer (tax; India)
AOAssessment Objective

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