AAS

• 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

• 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

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

• 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

• Acute aortic syndrome
• Anabolic–androgenic steroids, or simply anabolic steroids

• 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
• 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

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