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
- Base Station Almanac - A cellular providers list of base station locations used in Location Based Services
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