# AAC

AAC may refer to:

## Aviation

* Advanced Aircraft, a company from Carlsbad, California
* Airborne aircraft carrier, a type of aircraft
* Alaskan Air Command, a radar network
* American Aeronautical Corporation, a company from Port Washington, New York
* American Aviation, a company from Cleveland, Ohio
* Amphibian Airplanes of Canada, a company from Squamish, British Columbia
* Anti-Aircraft Warfare
* Army Air Corps (United Kingdom), a component of the British Army
* Australian Air Corps, immediate predecessor of the Royal Australian Air force
* Civil Aviation Authority (El Salvador) (Autoridad de Aviación Civil)
* Civil Aviation Authority (Panama) (Autoridad Aeronáutica Civil)
* IATA airport code for El Arish International Airport in North Sinai Governorate, Egypt
* United States Army Air Corps, a former component of the United States Army

## Education

* Anthony Abell College, a secondary school in Brunei
* Art Academy of Cincinnati, a private college
* Association of American Colleges known today as the American Association of Colleges and Universities
* Coimbra Academic Association, a Portuguese students' union

## Military

* Advanced Armament Corporation, manufacturer of sound suppressors
* United States Army Acquisition Corps
* Army Apprentices College, a former UK college
* Australian Army Cadets, a youth organisation

## Organizations

* Adult Association of Canada, a coalition of strip club owners and their agents
* Affirming Anglican Catholicism, a religious movement
* Alameda Arts Council
* American Anglican Council, a religious organization
* Australian Agricultural Company, a company
* Australian Aluminium Council, an industry association

## Sports

* American Airlines Center, a multipurpose arena in Dallas, Texas
* American Alpine Club, a climbing organization
* American Athletic Conference, an NCAA college conference made up of primarily Big East Conference teams before 2013
* Appalachian Athletic Conference, an NAIA college athletics conference
* Western North Carolina Athletic Conference, a high school organization known as the Appalachian Athletic Conference until 2009
* Asia-Pacific Amateur Championship, formerly Asian Amateur Championship, an APGC golf tournament
* Associação Académica de Coimbra – O.A.F., a Portuguese football organization
* Associação Académica de Coimbra – basketball, a Portuguese basketball club
* Associação Académica de Coimbra – volleyball, a Portuguese volleyball club
* Associação Académica de Coimbra, the students' union of the University of Coimbra, which sponsors other sports, including rugby
* Association of Alabama Camps, a youth camp organization
* Atlanta Athletic Club, a private athletic club in Duluth, Georgia
* Audax Alpine Classic, a bicycle event in Victoria, Australia

## Technology

* Advanced Audio Coding, an audio compression format, with the .aac file extension
* Air arc cutting, a gouging process for metals
* Auto Avio Costruzioni 815, a car by Ferrari
* Autoclaved aerated concrete, a building material
* Photochrom, also known as the Aäc process

## Other uses

* Anesthesiologist assistant (sometimes abbreviated AA-C), an assistant to an anesthesiologist
* Anne Arundel County, Maryland
* Antimicrobial Agents and Chemotherapy, an academic journal
* Ari language (New Guinea), coded aac in ISO 639-3
* Augmentative and alternative communication, a class of communications methods for people with speech impairments
* Pseudomembranous colitis, also known as antibiotic associated colitis, a medical complication
* AAC, a codon for the amino acid asparagine
* Adenine nucleotide translocator (ANT), also known as the ADP/ATP carrier protein (AAC)
* Armenian Apostolic Church, the national church of Armenia