Amateur Trapshooting Association was created in 1900.
Amateur Swimming Association was created in 1869.
A good place to find information on trapshooting is on the website of the Amateur Trapshooting Association. There is also a book dedicated to the subject by James Russell titled Trap Shooting Secrets.
Amateur Astronomers Association of Pittsburgh was created in 1929.
National Amateur Rowing Association was created in 1890.
Amateur Hockey Association of Canada was created in 1886.
National Amateur Bodybuilders Association was created in 1950.
Amateur Athletic Association - basketball - was created in 1897.
Radio Amateur Association of Greece was created in 1958.
World Amateur Body Building Association was created in 1976.
Eastern Canada Amateur Hockey Association was created in 1905.
All-American Amateur Baseball Association Hall of Fame was created in 1994.
9/16/1887 (Thanksgiving Day) by George Hancock.