OAS

OAS or Oas may refer to:

• 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 Canadians aged 65 or older
• 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 paramilitary organization during the Algerian War
• OAS1, OAS2, OAS3, human genes on chromosome 12 encoding the anti-viral enzymes oligoadenylate synthetase
• 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
• The Odd Angry Shot, an Australian film
• Oas, Albay, a municipality in the Philippines
• O-Acetylserine, an amino-acid involved in cysteine synthesis
• Ontario Archaeological Society, an organization promoting archaeology within the Province of Ontario, Canada