AAS

Aas or AAS may refer to:

Companies

 * Ateliers Aéronautiques de Suresnes, a defunct French aircraft manufacturing company
 * Alcatel Alenia Space, an aerospace company; now Thales Alenia Space
 * Austrian Air Services, a defunct airline from Austria (ICAO designator)

Organizations

 * African Academy of Sciences, an Africa-wide scientific organization
 * Air Ambulance Service, a UK charity
 * All-America Selections, an organization that promotes development of new garden seed varieties
 * American Antiquarian Society, an American society and national research library
 * American Anti-Slavery Society
 * American Arachnological Society, a society of amateur and professional arachnologists
 * American Association of Suicidology, an American nonprofit suicide prevention organization
 * American Astronautical Society, an independent scientific and technical group in the United States
 * American Astronomical Society, a United States society of professional astronomers
 * Ansar al-Sunna, or Jamaat Ansar al-Sunna, a militant group operating in Iraq
 * Arnold Air Society, a professional honorary service organization for US Air Force officer candidates
 * Association for Academic Surgery
 * Association for Asian Studies
 * Assyrian Academic Society
 * Assyrian Aid Society, an Iraqi organization of the Assyrian Democratic Movement
 * Australian Academy of Science, an independent, government-endorsed society with the aim of promoting science
 * Australian Anthropological Society

Publications

 * Austin American-Statesman, a Texas newspaper
 * Australian Aboriginal Studies, an Australian academic journal

Science, mathematics, and technology

 * Asymptotically almost surely
 * Angle-Angle-Side, see congruence (geometry)
 * Atomic absorption spectroscopy, for quantitative determination of chemical elements
 * ASCII Adjust after Subtraction, one of the x86 Intel BCD opcodes

Medicine

 * Acute aortic syndrome
 * Anabolic–androgenic steroid, or simply anabolic steroid

Other uses

 * A.a.s (art group), a British-based art collective
 * Aas (surname), people with the surname Aas
 * Aas (TV series), a Pakistani television series
 * Aas, Pyrénées-Atlantiques, a village in France
 * Abandon All Ships, an Italian-Canadian metalcore band from Toronto, Ontario
 * Acta Apostolicae Sedis, the official commentary of the Holy See/Vatican City State
 * Anglo-American School of Moscow
 * Anglo-American School of Sofia
 * Apalapsili Airport in Apalapsili, Indonesia, IATA code
 * Armed Aerial Scout a U.S. Army replacement program for the OH-58 Kiowa
 * As a service, a business model that allows companies to either outsource certain functions, or avoid purchasing certain goods
 * Asa language, an extinct language of Tanzania, ISO 639-3 code
 * Associate of Applied Science, a college degree
 * Audit and Assurance Standards issued by ICAI, the Institute of Chartered Accountants of India
 * Sony Auto-lock Accessory Shoe, on camera
 * Taylor County Airport (Kentucky), Campbellsville, US, FAA LID
 * Eyeish, a Native American tribe