AO

Acronym	Definition
AO	Announcement of Opportunity
AO	All Out
AO	Anarchy Online (internet game)
AO	Angola
AO	Adaptive Optics
AO	Adjustable Objective (rifle telescopic sight)
AO	Order of Australia
AO	Australian Open (tennis tournament)
AO	Adults Only (ESRB game rating, 18 yrs. and up; graphic sex/violence)
AO	Administrative Order
AO	Account Of
AO	Advisory Opinion
AO	Aosta (Val d'Aosta, Italy)
AO	And Others
AO	Anarchy-Online (PC MMORPG)
AO	Among Others
AO	Agent Orange (herbicidal warfare)
AO	Analog Output
AO	Other Articles (US postal service)
AO	Applied Optics
AO	Officer of the Order of Australia
AO	Annoying Orange (Youtube channel)
AO	Ambient Occlusion (graphics)
AO	Atlantic Ocean
AO	Assessing Officer (tax; India)
AO	American Optical
AO	Adults Only
AO	Abgabenordnung (German tax regulations)
AO	Abdominal Obesity
AO	Arctic Ocean
AO	Age Old
AO	Arctic Oscillation
AO	Atmosphere-Ocean
AO	Assessment Objective
AO	Area of Operation
AO	Application Outsourcing
AO	Area Office
AO	Archives of Ontario
AO	Australian Airlines (IATA airline code)
AO	Audit Office
AO	Anti-Oxidant
AO	Acridine Orange
AO	AntiOnline (computer security website)
AO	Abort Output (TELNET protocol)
AO	Argentum Online
AO	Authorizing Official (for IMPAC Purchases)
AO	Arbeitsgemeinschaft für Osteosynthesefragen (Association for the Study of Internal Fixation)
AO	Action Oriented
AO	Alexander Ovechkin (hockey player)
AO	Autonomous Okrug
AO	Administration Officer
AO	Atomic Oxygen
AO	Admit One
AO	Action Officer
AO	Academy of Osseointegration
AO	Application Object
AO	Autres Objets (Canada universal postal union)
AO	American Outlaws (soccer fan group)
AO	Aircraft Operator
AO	Ambleside Online (homeschool curriculum)
AO	Atomic Orbital
AO	Operational Availability
AO	Amphibious Operation
AO	Accounts Office
AO	Atlas Orthogonal (chiropractic technique; also seen as AOT)
AO	Aviation Officer
AO	Anglicans Online
AO	Afrique Orientale (German East Africa)
AO	Active Optical
AO	Account Owner
AO	Air Officer
AO	Air Operation
AO	Appeals Office(r)
AO	Auslandsorganisation (foreign section of NSdAP)
AO	Office of the Administrator
AO	Acousto Optics
AO	Aerial Observer
AO	Answers Only (educational testing)
AO	Atlanto-Occipital (joint)
AO	American Outfitters (store)
AO	Automated Office
AO	Alpha et Omega (epigraphy)
AO	Auxiliary Oiler (Ship Type)
AO	Access Opening
AO	Advanced Organization (Church of Scientology)
AO	Fly Outs (baseball statistic)
AO	Automated Operations
AO	Ambulance Officer (ambulance service; chiefly Australian)
AO	Air Observer
AO	Atualidades Ornitológicas (Ivaiporã-PR, Brazil)
AO	Acquisition Objective
AO	Associated Object
AO	Atomic Operation
AO	Aaron Owens (streetball player)
AO	Annotated Outline
AO	Athlitikos Omilos (Greek: Athletic Club)
AO	Assignment Officer
AO	Asylum Officer (US DHS)
AO	Associate Office
AO	Abnormal Occurrence
AO	Assembly Order
AO	Aviation Ordnance Person (US DoD)
AO	Atelosteogenesis
AO	Accredited Organization
AO	Assisted Opener (type of knife)
AO	Authentic Orginal (retail)
AO	Attendees Only
AO	Accommodation Officer
AO	Access Ordering
AO	Auxiliary Operator (nuclear industry)
AO	Anodal Opening
AO	Automags Online
AO	Attack Objective
AO	Assisted Operations
AO	Acronym Overload
AO	Aortagram
AO	Apostolic Oblates
AO	Asia Onlus (Rome, Italy)
AO	Airdrome Officer
AO	Administrative Office/ Officer
AO	Association Orukutuku
AO	Associate Post Office (also called associate office)
AO	Aeronautical Orders (orders authorizing a military person to perform duties in flight)
AO	Awards and Obligations
AO	ACCS (Army Command and Control System) OSI (Operator System Interface)
AO	Aerosol Obscurant
AO	Accompanying Object
AO	Approximate Optimum Method
AO	Arkansas and Ozarks Railway
AO	Air Overseas, Inc.
AO	(USN Rating) Aviation Ordnanceman
AO	Authorized Outage
AO	Adaptive Onestep (IEEE)