OAS may stand for:
- Organization of American States, an international organization of the Americas
- Ohio Auction School, an auction school in Ohio, USA
- Old Age Security, a social security payment available to most 65+ Canadians
- Oracle Application Server, an integrated, standards-based software platform
- Oral allergy syndrome, an allergic reaction to certain fruits, nuts, and vegetables that develops in hay fever sufferers
- Organisation de l'armée secrète, a short-lived, French far-right nationalist militant organization during the Algerian War
- Option adjusted spread, the flat spread over the treasury yield curve required to discount a security payments to match its market price
- Open-Architecture-System, the main User interface of the Wersi keyboard line
- Offensive air support
- Office Automation Systems
- Also, see
- Oas, Albay, is a municipality in the Philippines. The Organization of American States ( OAS, or as it is known in the three other official languages OEA) is an International organization, headquartered The Ohio Auction School (OAS is an Auction school located near Columbus Ohio, USA. The Old Age Security Pension (or OAS or OAS-GIS) is a taxable monthly Social security payment available to most Canadians In Computing, the Oracle Application Server 10g (the "g" stands for Grid) consists of an integrated standards-based software platform. Oral allergy syndrome or OAS is an Allergic reaction to certain (usually fresh Fruits, nuts, and Vegetables that develops in The Organisation de l'armée secrète ( OAS &mdash or Organisation armée secrète, lit Option adjusted spread (OAS is the flat spread over the treasury Yield curve required to Discount a security payment to match its Open-Architecture-System (OAS is the main User interface and synthesizer software of the Wersi keyboard line Oas is a 2nd class municipality in the province of Albay, Philippines. A municipality ( bayan, sometimes munisipyo in Cebuano or used infrequently in Tagalog) is a local government unit in the Philippines The Philippines ( Filipino: Pilipinas, officially known as the Republic of the Philippines (fil ''Republika ng Pilipinas'' RP
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