AA Aluminum Association, U.S.A.
AAR Association of American Railroads, U.S.A.
ABS American Bureau of Shipping, U.S.A.
ACI Alloy Casting Institute, U.S.A.
ACS American Chemical Society, U.S.A.
AFBMA Anti-Friction Bearing Manufacturers Association, U.S.A.
AGA American Gas Association, U.S.A.
AGMA American Gear Manufacturers Association, U.S.A.
AIIS American Institute for International Steel, U.S.A.
AIME American Institute of Mining, Metallurgical & Petroleum Engineers, U.S.A.
AISA Australian Independent Steel Association, Australia.
AISC American Institute of Steel Construction, U.S.A.
AISI American Iron and Steel Institute, U.S.A.
ALCOA Aluminum Company of America, U.S.A.
AMS Aerospace Material Specifications-SAE, U.S.A.
AN Air Force-Navy Aeronautical Standards, U.S.A.
ANSI American National STandards Institute, U.S.A.
API American Petroleum Institute, U.S.A.