Initialism of American Alumni Council, now known as Council for Advancement and Support of Education. • Initialism of Association of American Colleges, now known as Association of American Colleges and Universities. • Australian Air Corps, now known as Royal Australian Air Force • Initialism of American Anglican Council. • Initialism of Agility Association of Canada. • Initialism of Alameda Arts Council. • Initialism of Alaskan Air Command. • Initialism of All-American Canal. • Initialism of American Airlines Center. • Initialism of American Alpine Club. • Initialism of Amphibian Airplanes of Canada. • Initialism of Anglo-American Corporation. • Initialism of Army Air Corps; Army Air Corps. • Initialism of Army Apprentices College. • Initialism of Association of Alabama Camps. • Initialism of Atlanta Athletic Club. • Initialism of Australian Agricultural Company. • Initialism of Advanced Aircraft Corps. • Initialism of Aerial Ambulance Company. • Initialism of Aeronautical Advisory Council. • Initialism of Aluminum Annodizers Council. • Initialism of Allumnae Advisory Center. • Initialism of American Academy of Criminalists. • Initialism of American Archery Council. • Initialism of American Association of Criminology. • Initialism of American Atheist Center. • Initialism of Anti-aircraft Corps. • Initialism of Association of American Choruses. • Initialism of Australian Apprentiship Centre. • Initialism of Australian Association of Chiropractors. • Initialism of Auto Avia Contruzione, Enzo Ferrari's first company. • Initialism of Automotive Advertisers Council. • Initialism of Auxiliary Artillery Corps. • Initialism of Auxiliary Army Corps.