BSA

BSA may refer to:

Armies

• Bosnian Serb Army— Army of the Republika Srpska

Organizations

• Baltimore School for the Arts
• Bank Secrecy Act
• Bearing Specialists Association
• Belarusian Socialist Assembly
• Bhutan Scouts Association
• Bibliographical Society of America
• Birmingham School of Acting
• Birmingham Small Arms Company, a British manufacturer of military and civilian firearms and vehicles including motorcycles
• Boston Society of Architects, Boston Chapter of the American Institute of Architects (AIA)
• Botanical Society of America
• The Botswana Scouts Association
• Boy Scouts of America
• Brazilian Space Agency
• British School at Athens
• British School of Amsterdam
• British Schools of America
• British Science Association, a trading name for the British Association for the Advancement of Science
• British Sociological Association
• British South Africa Company
• British Speleological Association
• British Stammering Association
• British Stratego Association
• Broadcasting Standards Authority
• Bronx Success Academy, part of Harlem Success Academy
• Building Societies Association
• Business Services Association, the body representing UK outsourced service providers
• Business Software Alliance

In medicine

• Body surface area
• Bovine serum albumin, used as a standard for protein assay curves
• Broad-spectrum antibiotic

Other

• Bachelor of Science in Agriculture
• Bank Secrecy Act
• Behavioral systems analysis
• Bethesda Softworks Archive, a common extension used by this company for the data needed by its games
• Bismuth (Bi), Tin (Sn), Silver (Ag) solder, a lead-free solder
• Bisphenol A
• Bis(trimethylsilyl)acetamide
• The British Soap Awards
• Bronze service arrowhead, properly known as the arrowhead device, an insignia of the United States Army
• Business system analyst or business analyst