AAC

AAC may refer to:

Aviation

• Advanced Aircraft, a company from Carlsbad, California
• 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
• El Arish International Airport's IATA code
• Civil Aviation Authority (El Salvador) (Autoridad de Aviación Civil)
• Civil Aviation Authority (Panama) (Autoridad Aeronáutica Civil)

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

• Anti-Aircraft Warfare
• Advanced Armament Corporation, manufacturer of sound suppressors
• Airborne aircraft carrier, a type of aircraft
• United States Army Acquisition Corps
• United States Army Air Corps, a former component of the United States Army
• Army Air Corps (United Kingdom), a component of the British Army
• Army Apprentices College, a former UK college
• Australian Air Corps, immediate predecessor of the Royal Australian Air force
• 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)