OAS

• 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 nationalist terrorist 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.
• Offensive air support.
• The Odd Angry Shot, an Australian film.
• Oas, Albay, a municipality in the Philippines.
• Otago Art Society, based in Dunedin, New Zealand
• O-Acetylserine, an amino-acid involved in cysteine synthesis

See also

• Oaş