OAS or Oas may refer to:

Chemistry

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

Computers

Open-Architecture-System Open-Architecture-System (OAS) is the main User interface and synthesizer software of the Wersi keyboard line. OAS improves on prior organ interfaces by allowing the user to add sounds, rhythms, third party programs and future software enhancemen ...

, the main user interface of Wersi musical keyboards *

OpenAPI Specification The OpenAPI Specification, previously known as the Swagger Specification, is a specification for a machine-readable interface definition language for describing, producing, consuming and visualizing RESTful web services. Previously part of the S ...

(originally Swagger Specification), specification for machine-readable interface files for RESTful Web services *

Oracle Application Server The Oracle Application Server 10g (the "g" stands for ''grid'') (short Oracle AS), consists of an integrated, standards-based software platform. It forms part of Oracle Corporation's Fusion Middleware technology stack. The heart of Oracle Applic ...

, software platform

Medicine

Open aortic surgery Open aortic surgery (OAS), also known as open aortic repair (OAR), describes a technique whereby an abdominal, thoracic or retroperitoneal surgical incision is used to visualize and control the aorta for purposes of treatment, usually by the repla ...

, surgical technique *

Oral allergy syndrome Oral allergy syndrome (OAS) or pollen-food allergy is a type of food allergy classified by a cluster of allergic reactions in the mouth and throat in response to eating certain (usually fresh) fruits, nuts, and vegetables that typically develops ...

, food-related allergic reaction in the mouth *

2'-5'-oligoadenylate synthase In molecular biology, 2'-5'-oligoadenylate synthetase (2-5A synthetase) is an enzyme () that reacts to interferon signal. It is an antiviral enzyme that counteracts viral attack by degrading RNAs, both viral and host. The enzyme uses ATP in 2'-sp ...

, an enzyme ** OAS1,

OAS2 2'-5'-oligoadenylate synthetase 2 is an enzyme that in humans is encoded by the ''OAS2'' gene. This gene encodes a member of the 2-5A synthetase family, essential proteins involved in the innate immune response to viral infection. The encoded prot ...

OAS3 2'-5'-oligoadenylate synthetase 3 is an enzyme that in humans is encoded by the ''OAS3'' gene. This gene encodes an enzyme included in the 2', 5' oligoadenylate synthase family. This enzyme is induced by interferons and catalyzes the 2', 5' oli ...

, anti-viral enzymes in humans

Organizations

* Office of Aviation Services, agency of the

United States Department of the Interior The United States Department of the Interior (DOI) is one of the executive departments of the U.S. federal government headquartered at the Main Interior Building, located at 1849 C Street NW in Washington, D.C. It is responsible for the mana ...

Ontario Archaeological Society The Ontario Archaeological Society is a registered charitable organization promoting the ethical practice of archaeology within the Province of Ontario, Canada. It is a public and professional society formed in 1950. The Society produces a peer- ...

, 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 The Organization of American States (OAS; es, Organización de los Estados Americanos, pt, Organização dos Estados Americanos, french: Organisation des États américains; ''OEA'') is an international organization that was founded on 30 April ...

, continental organization of the Western Hemisphere * Oxford Art Society, society for artists in the city of Oxford, England

Transport

Oasis LRT station The Punggol LRT is an automated guideway transit line in Singapore. The line, which initially opened on 29 January 2005, connects the residential districts and suburbs of Punggol to Punggol Town Centre, where it connects with the North East M ...

, Singapore, LRT station abbreviation OAS

Other

Ohio Auction School The Ohio Auction School (OAS) is an auction school located near Columbus, Ohio, United States. Many states require that individuals complete a course of study at a state approved auction school in order to be licensed to practice in that state. Th ...

, school for auctioneers in Ohio, U.S. * Old Age Security, social security payment available to most Canadians aged 65 or older *

Option-adjusted spread Option-adjusted spread (OAS) is the yield spread which has to be added to a benchmark yield curve to discount a security's payments to match its market price, using a dynamic pricing model that accounts for embedded options. OAS is hence model-dep ...