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