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{{wiktionary|-aco}}
'''ACO''', '''AcO''', or '''Aco''' may refer to:
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==Organizations==
* [[Accountable care organization]], healthcare organization characterized by a specific payment and care delivery model
* [[ACO, C.A.]], a Venezuelan holding company<!--- ACO Group targets the Venezuelan company ---->
* {{ill|ACO Group (Germany) |de|ACO Gruppe)}}, a family-owned global engineering enterprise
* [[Aco Records]], a British 1920s record label
* [[Air Cadet Organisation]], collective name for the UK cadet forces sponsored by the Royal Air Force
* [[The Airline Cooperative]], an organization of international airlines formed in 2012
* [[Allied Command Operations]], the NATO strategic command
* [[Alvarez Chamber Orchestra]]
* [[American Composers Orchestra]]
* [[American Cornhole Organization]]
* [[Arts Center of the Ozarks]], community theater in Springdale, Arkansas, US
* [[Association of Cricket Officials]]
* [[Australian Chamber Orchestra]]
* [[Australian College of Optometry]]
* [[Automobile Club de l'Ouest]], sportscar racing governing body
* [[Avenir du Congo]], a political party in the Democratic Republic of the Congo
* [[Canadian Association of Orthodontists]] (''Association canadienne des orthodontistes'', ACO)
==Places==
* [[Aco District, Concepción]], Peru
* [[Aco District, Corongo]], Peru
==People==
* [[Aco (given name)]], a list of people
* [[Michel Aco]] ({{fl.|1680–1702}}), French explorer in North America
* [[Aco (musician)]] (born 1977), Japanese female singer
==Other uses==
* [[Abell catalogue|Abell catalog]] of rich clusters of galaxies (ACO)
* [[Acetoxy group]] (AcO), a chemical functional group
* [[All-trans-8'-apo-beta-carotenal 15,15'-oxygenase]], an enzyme
* Analog Coherent Optical module (CFP2-ACO), an interoperability agreement produced by the [[Optical Internetworking Forum#CFP2-ACO Implementation Agreement|Optical Internetworking Forum]]
* Animal control officer, a qualified person in the [[Animal control service]]
* [[Ant colony optimization]], a computer algorithm
* [[Accountable care organization]], a type of health system model
==See also==
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* [[ACCO (disambiguation)]]
* [[Acho]], a surname
* [[Acos (disambiguation)]]
* [[Akko (disambiguation)]]
* [[Ako (disambiguation)]]
* [[CO (disambiguation)]]
* {{srt|1}}
{{disambiguation|geo}}