AAC

• Adult Association of Canada
• Advanced Aircraft
• Advanced Armament Corporation
• Advanced Audio Coding
• Affirming Anglican Catholicism
• Agility Association of Canada
• Air arc cutting
• Airborne aircraft carrier
• Alameda Arts Council
• Alaskan Air Command
• American Aeronautical Corporation
• American Airlines Center
• American Alpine Club
• American Anglican Council
• American Athletic Conference
• American Aviation
• Amphibian Airplanes of Canada
• Anesthesiologist assistant
• Anne Arundel County, Maryland
• Anthony Abell College
• Antimicrobial Agents and Chemotherapy
• Appalachian Athletic Conference
• Ari language (New Guinea)
• Army Air Corps (United Kingdom)
• Army Apprentices College
• Art Academy of Cincinnati
• Asia-Pacific Amateur Championship
• Association of Alabama Camps
• Association of American Colleges
• Associação Académica de Coimbra
• Associação Académica de Coimbra – O.A.F.
• Associação Académica de Coimbra – basketball
• Associação Académica de Coimbra – volleyball
• Atlanta Athletic Club
• Audax Alpine Classic
• Augmentative and alternative communication
• Australian Agricultural Company
• Australian Air Corps
• Australian Aluminium Council
• Australian Army Cadets
• Auto Avio Costruzioni 815
• Autoclaved aerated concrete
• Civil Aviation Authority (El Salvador)
• Civil Aviation Authority (Panama)
• Coimbra Academic Association
• El Arish International Airport
• Pseudomembranous colitis
• United States Army Acquisition Corps
• United States Army Air Corps
• Western North Carolina Athletic Conference