Aas or AAS may refer to:

Aviation

  • Alcatel Alenia Space, an aerospace company; now Thales Alenia Space
  • Armed Aerial Scout a U.S. Army replacement program for the OH-58 Kiowa
  • Arnold Air Society, a professional honorary service organization for US Air Force officer candidates
  • Ateliers Aéronautiques de Suresnes, a defunct French aircraft manufacturing company
  • Austrian Air Services, a defunct airline from Austria (ICAO designator)
  • IATA airport code for Apalapsili Airport in Highland Papua Province, Indonesia
  • Taylor County Airport (Kentucky), Campbellsville, US, FAA LID

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
  • Association for Academic Surgery
  • Association for Asian Studies, a scholarly professional association focusing on Asia and the study of Asia
  • 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 steroids, or simply anabolic steroids

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
  • Anglo American Sur, a copper mining company based in Chile
  • 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
  • Eyeish, a Native American tribe