title: OAS
text: # 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
  