BSA

BSA may refer to:

Businesses and organizations

 * Basketball South Africa
 * Bearing Specialists Association, an American trade association
 * Belarusian Socialist Assembly
 * Bibliographical Society of America
 * Birmingham Small Arms Company, UK manufacturer of firearms and vehicles
 * Black Sky Aerospace, an Australian aerospace company
 * Black Socialists in America
 * Boston Society of Architects
 * Botanical Society of America
 * Boy Scouts of America
 * Scouts BSA, the flagship program
 * British Social Attitudes Survey
 * British Sandwich & Food to Go Association
 * British Science Association
 * British Sociological Association
 * British Speleological Association
 * British Stammering Association
 * Broadcasting Service Association, the former name of the Australian radio network Macquarie Media
 * Broadcasting Standards Authority, a New Zealand statutory authority
 * BSA Company, motorcycle manufacturer
 * BSA motorcycles, made by the Birmingham Small Arms Company Limited
 * The Software Alliance, a trade group established by Microsoft and formerly called Business Software Alliance
 * BSA Manufacturing, a Malaysian manufacturer of aluminum alloy wheels
 * Business Services Association, of UK service providers

Schools

 * Baltimore School for the Arts
 * Birmingham School of Acting
 * British School at Athens

Science and medicine

 * Behavioral systems analysis
 * Bis(trimethylsilyl)acetamide
 * Body surface area
 * Bovine serum albumin
 * Broad-spectrum antiviral drug

Other uses

 * Bank Secrecy Act, US
 * Bilateral Security Agreement, US umbrella for military cooperation
 * Bosnian Serb Army, the Army of Republika Srpska, the former armed forces of the Republika Srpska
 * Bachelor of Science and Arts (BSA)
 * Bachelor of Science in Accountancy (BSA)
 * Bachelor of Science in Agriculture (B.S.A.)
 * British Soap Awards, an awards ceremony in the UK
 * BSA, a brand of bicycles produced by Tube Investments of India
 * Business systems analyst
 * Blue Dragon Series Awards, an annual award ceremony in South Korea
 * Bharatiya Sakshya Act, 2023, Indian evidence act