BTA may refer to: Butyric acid Baltimore Transit Alliance Basic Trading Area, a geographical area defined by the U.S. Federal Communications Commission Becoming the Archetype, a Christian metal band Benzotriazole Bicycle Transportation Alliance Bilateral trade agreement Bilateral Terran Alliance, a fictional human alliance in the 1985 film Enemy Mine Biological Terrain Assessment Black Theatre Alliance, a federation of theater companies in New York City BlueTooth Address Bolshoi Teleskop Azimutalnyi, a 6 m telescope located in Russia Botswana Telecommunications Authority British Tourist Authority British Triathlon Association, the former name of the British Triathlon Federation BTA Bank, of Kazakhstan, formerly Bank TuranAlem Bulgarian News Agency Business Technology Association Business Transformation Agency Board of Tax Appeals Airport code for Blair Municipal Airport