| Acronym | Definition |
|---|
| BAS | Basic Language (File Name Extension) |
| BAS | Bulgarian Academy of Sciences |
| BAS | Business Activity Statement (Australian GST) |
| BAS | Business Activity Statement |
| BAS | Base (building code) |
| BAS | Basic |
| BAS | Building Automation System (Sprint) |
| BAS | British Antarctic Survey |
| BAS | Building Automation Systems |
| BAS | Bachelor of Applied Science |
| BAS | Biblical Archaeology Society |
| BAS | Bibliography of Asian Studies |
| BAS | Brake Assist System |
| BAS | Basic Allowance for Subsistence (US DoD) |
| BAS | Business Advisory Services |
| BAS | Board for Actuarial Standards (UK FRC) |
| BAS | Bureau of Agricultural Statistics (Philippines) |
| BAS | Bulletin of the Atomic Scientists |
| BAS | Battalion Aid Station |
| BAS | Belize Audubon Society |
| BAS | Broadcast Auxiliary Service (FCC) |
| BAS | Bureau d'Aide Sociale |
| BAS | Broadband Access Server |
| BAS | Bodadeg ar Sonerion (French traditional musician association) |
| BAS | Balalae, Solomon Islands (airport code) |
| BAS | Book of Alternative Services (Anglican Church of Canada) |
| BAS | Business and Administrative Services |
| BAS | Behavioral Activation System |
| BAS | British Andrology Society |
| BAS | Basic Accounting System |
| BAS | British Arachnological Society (UK) |
| BAS | British Ability Scale |
| BAS | Bachelor of Administrative Studies |
| BAS | Bachelor of Arts and Sciences |
| BAS | Broadband Access Systems |
| BAS | Basic Activity Subset (ITU-T) |
| BAS | Birch Aquarium At Scripps |
| BAS | Broadband Access Switch |
| BAS | Beta-Adrenergic Stimulation |
| BAS | Bit-Rate Allocation Signal |
| BAS | Barbados Agricultural Society |
| BAS | Belt Alternator System (automobile) |
| BAS | Basic Allowance for Sustenance (US DoD) |
| BAS | Bank of America Securities LLC |
| BAS | Battlefield Automated System |
| BAS | Big Ass Smile |
| BAS | Bihar Administrative Service (India) |
| BAS | Business Automation Services |
| BAS | Benefit Administrative Systems, LLC (health care) |
| BAS | Bad Aibling Station (US DoD; Germany) |
| BAS | Bit Allocation Signal |
| BAS | Breathing Air System (hazardous environments) |
| BAS | Business Analysis Support |
| BAS | Business Application Solution |
| BAS | Basic Freight (shipping) |
| BAS | Business Administration System |
| BAS | Buffer Assisted Search |
| BAS | Big Agile Server (US DoD) |
| BAS | Beer Appreciation Society |
| BAS | Broad Area Search |
| BAS | Budget Allocation Summary |
| BAS | Baseline Assessment Strategy |
| BAS | Business Automated Services |
| BAS | Battlefield Air Support |
| BAS | Biological Agent Stimulant |
| BAS | Basic Airspeed |
| BAS | Brake Apply Sensor (automotive) |
| BAS | Biological Agent Simulate |
| BAS | Business Area System |
| BAS | Belrose Accounting Services |
| BAS | Battle Automation System |
| BAS | Black Analog Switch |
| BAS | Break-At-Store |
| BaS | Bundesarbeitsgemeinschaft Seniorenbüros eV |
| BAS | Bipartite Access Structure |
| BAS | Battlefield Area Support |
| BAS | Blind Authentication Search |
| BAS | Burgmann Anglican School (Canberra, Australia) |
| BAS | Brooks Air Systems, Inc. |
| BAS | Basic Afghanistan Service |
| BAS | Before and After School (program; various locations) |
| BAS | Bachelor of Architectural Studies (various schools) |
| BAS | Broke-Ass Stuart (travel writer) |
| BAS | Body and Society |