OAS

OAS or Oas may refer to:

Chemistry

• O-Acetylserine, amino-acid involved in cysteine synthesis

Computers

• Open-Architecture-System, the main user interface of Wersi musical keyboards
• OpenAPI Specification (originally Swagger Specification), specification for machine-readable interface files for RESTful Web services
• Oracle Application Server, software platform

Medicine

• Open aortic surgery, surgical technique
• Oral allergy syndrome, food-related allergic reaction in the mouth
• 2'-5'-oligoadenylate synthase, an enzyme
  • OAS1, OAS2, OAS3, anti-viral enzymes in humans

Organizations

• Office of Aviation Services, agency of the United States Department of the Interior
• Ontario Archaeological Society, organization promoting archaeology within the Province of Ontario, Canada
• Organisation Armée Secrète, French dissident terrorist organisation, active during the Algerian War (1954–62), fighting against Algerian independence
• Organization of American States, continental organization of the Western Hemisphere
• Oxford Art Society, society for artists in the city of Oxford, England

Transport

• Oasis LRT station, Singapore, LRT station abbreviation OAS

Other

• Ohio Auction School, school for auctioneers in Ohio, U.S.
• Old Age Security, social security payment available to most Canadians aged 65 or older
• Option-adjusted spread, the yield-curve spread of a fixed-income security, adjusted for the cost of embedded options
• Oas, Albay, municipality in the Philippines

See also

• Oaş (disambiguation)