BSA

Organizations

• Baltimore School for the Arts
• Bearing Specialists Association
• Belarusian Socialist Assembly
• Birmingham School of Acting
• Birmingham Small Arms Company, a British manufacturer of military equipment and vehicles including motorcycles
• Botanical Society of America
• Boy Scouts of America
• BPO Services Association Unlimited (BSA/U)
• Brazilian Space Agency
• British School at Athens
• British School of Amsterdam
• British Sociological Association
• British Stratego Association
• Broadcasting Standards Authority
• BSA - The Business Services Association, the body representing UK outsourced service providers
• Building Societies Association
• Business Software Alliance

In medicine

• Body surface area
• Bovine serum albumin
• Broad spectrum antibiotics
• Bulked segregant analysis, a technique used in genetics

Other

• Bank Secrecy Act
• Bethesda Softworks Archive, a common extension used by this company for the data needed by its games
• Bismuth (Bi), Tin (Sn), Silver (Ag) solder
• Bisphenol A
• British Soap Awards
• Bronze Service Arrowhead
• Business Solution Architect
• Business Systems Analyst
• The European Burden Sharing Agreement