| Acronym | Definition |
|---|
| BSA | Business Software Alliance |
| BSA | Boy Scouts of America |
| BSA | Birmingham Small Arms (BSA motorcycles) |
| BSA | Bank Secrecy Act |
| BSA | Bovine Serum Albumin |
| BSA | Botanical Society of America |
| BSA | Body Surface Area |
| BSA | Black Student Alliance |
| BSA | Boston Society of Architects (Boston, MA) |
| BSA | British Sociological Association |
| BSA | Building Societies Association (UK) |
| BSA | Bitstream Access |
| BSA | Bad Sooden-Allendorf (Germany) |
| BSA | Bank of South Australia |
| BSA | British Stammering Association |
| BSA | Board of Standards and Appeals (New York) |
| BSA | Baltimore School for the Arts (Baltimore, MD) |
| BSA | Business Services Authority (NHS) |
| BSA | Broad-Spectrum Antibiotic |
| BSA | Broadcasting Standards Authority (New Zealand) |
| BSA | Bureau of State Audits (California) |
| BSA | Basic Serving Arrangements |
| BSA | Black Student Association |
| BSA | Bons de Souscription d'Actions (French: buy option) |
| BSA | British School at Athens (school of classical studies and archaeology in Athens) |
| BSA | Brotherhood of St. Andrew (various locations) |
| BSA | Balance Sheet Analysis |
| BSA | Basic Skills Agency (UK) |
| BSA | Business Services Administration (various locations) |
| BSA | Business Software Association |
| BSA | Brigade Support Area |
| BSA | British School of Amsterdam (Amsterdam, Netherlands) |
| BSA | Buy-Sell Agreement (contracts) |
| BSA | Business Systems Analysis |
| BSA | Basic Savings Account |
| BSA | Board of Scientific Advisors |
| BSA | Bearing Specialists Association |
| BSA | Bison Sports Arena (North Dakota State University) |
| BSA | British Society of Audiology |
| BSA | Bachelor of Science In Accountancy (degree) |
| BSA | Basic Service Area |
| BSA | Bachelor of Science in Agriculture (degree) |
| BSA | Business Start-Up Assistant (Canada) |
| BSA | Billing Service Agreement (various organizations) |
| BSA | Blowing Snow Advisory (weather) |
| BSA | Brussels Sports Association |
| BSA | Board of Supreme Audit (Iraq) |
| BSA | Backpacking South Africa |
| BSA | N,O-Bis(Trimethylsilyl)acetamide (silylation reagent) |
| BSA | Bulk Segregant Analysis |
| BSA | Booking South Africa |
| BSA | Brownfields Site Assessment (Texas) |
| BSA | Bible Science Association (creationism) |
| BSA | Bangladesh Student Association |
| BSA | Business Service Assistant (various locations) |
| BSA | Board of Scientific Affairs |
| BSA | Base Station Antenna |
| BSA | Baseball Softball Academy (various locations) |
| BSA | Bulgarian Studies Association |
| BSA | Bachelor of Science in Architecture (degree) |
| BSA | Buffalo Sewer Authority (New York) |
| BSA | Bidouilleurs sans Argent (French: Hackers without Money; website) |
| BSA | Birdcare Standards Association |
| BSA | Buffer Stop Assembly (US DoD) |
| BSA | Balance Sensor Assembly (Silicon Sensing Systems component of the Segway HT) |
| BSA | Balance Sheet Account |
| BSA | Business Systems Architecture (Sprint) |
| BSA | Bridgewater Sports Arena (Bridgewater, NJ) |
| BSA | Business Solutions Architect |
| BSA | Balochistan Scouts Association (Pakistan) |
| BSA | Backbone Service Area |
| BSA | Bibliothèque des Sciences de l'Antiquité (French: Library of Ancient Science; University of Lille) |
| BSA | Beach Support Area |
| BSA | Bamboo Society of Australia (Queensland, Australia) |
| BSA | Biofeedback Society of America |
| BSA | Bachelor of Science and Arts (degree) |
| BSA | Bible Sabbath Association |
| BSA | Beavercreek Soccer Association |
| BSA | Binary Switching Algorithm |
| BSA | Bell Solutions d'affaires (French: Bell Business Solutions) |
| BSA | Bridgewater Soccer Association (est. 1975) |
| BSA | Besançon Sport Airsoft (French airsoft group) |
| BSA | Business Systems Applications (US Navy) |
| BSA | Business Service Agreement |
| BSA | Block Space Agreement (freight contract) |
| BSA | Blois Sologne Astronomie (French astronomy club) |
| BSA | Blavet Scorff Athlétisme (French athletic club) |
| BSA | Blanket Sales Agreement (finance) |
| BSA | Belgian Strong Ale |
| BSA | Bloody Sore Arse (bicycle/rowing) |
| BSA | Basic Standardization Agreement |
| BSA | Backstage Access (magazine; Los Angeles, CA) |
| BSA | Badminton South Africa |
| BSA | Buffer Storage Area |
| BSA | Basic Service Agreement |
| BSA | Basic Street Address (US Census) |
| BSA | Basic Surface Attack |
| BSA | Budget Subactivity |
| BSA | British Small Arms Company (Birmingham, England, UK; est. 1861) |
| BSA | Bureautique System Associés (French: Office System Associates) |
| BSA | Brandywine Soaring Association (New Garden Airport, Pennsylvania) |
| BSA | Business Standards Advisor |
| BSA | British Sporting Arms, Ltd. |
| BSA | Bonsecours Services Auto (French car repair company) |
| BSA | Business Stability Analysis |
| BSA | Backbone Synthesis Algorithm |
| BSA | Brilliant Systems Architecture (LViHD Systems ) |
| BSA | Best Speaker Award |
| BSA | Base Support Agreement |
| BSA | Bulk Service Agreement (Sprint) |
| BSA | Byte Serial Adapter |
| BSA | Bureau of Seafood & Aquaculture (Tallahassee, Florida) |
| BSA | Buffer Slot Availability |
| BSA | Branch Stock Accounting |
| BSA | Base Support Activity/Activities |
| BSA | Bull Stuff Artist (polite form) |
| BSA | Brief Stop for Ammo Lift |
| BSA | Barrett Steele Architecture (Boulder, CO) |
| BSA | Broadband Service Analyzer (HP) |
| BSA | Breizh Soft Attack (French airsoft group) |
| BSA | Bank Security Act of 1970 |