BAS may stand for:

Most commonly:

Others:
  • Bachelor of Administrative Studies
  • Bachelor of Applied Science
  • Bachelor of Arts and Sciences
  • Baltimore Appliqué Society
  • Barbados Agricultural Society
  • Barbados Astronomy Society
  • Battalion aid station
  • Battlefield Automated System (US Army)
  • Belize Audubon Society
  • Biblical Archaeology Society
  • Birch Aquarium At Scripps
  • Birmingham Astronomy Society
  • Bit Allocation Signal
  • Brake assist system (automobile)
  • British Alpaca Society
  • British Alumni Society (bas.org.pl)
  • British American Society
  • British Andrology Society
  • British Antarctic Survey
  • British Aphasiology Society (bas.org.uk)
  • British Arachnological Society
  • British Atherosclerosis Society
  • Broadcast auxiliary service
  • Building automation system

BAS is the airport code for Balalae, Solomon Islands.

BAS is the SIL code for the Bassa language of Liberia.