AO, aO, Ao, or ao may refer to:

Places

  • Ao, or Aodu, capital of Shang dynasty, near Zhengzhou
  • Ao, Estonia, village in Väike-Maarja Parish, Lääne-Viru County, Estonia
  • Ao River (Fujian) (敖 江, Áo Jiāng) in Fujian, China
  • Angola (ISO 3166-1 alpha-2 code AO)

Arts and entertainment

Businesses and organizations

  • AO (originally American Optical Company) eyeglass lenses, a brand now merged with Carl Zeiss Vision
  • AO Foundation (originally Arbeitsgemeinschaft für Osteosynthesefragen), a non-profit organisation dedicated to the treatment of trauma and disorders of the musculoskeletal system
  • AO World, a UK retailer of household appliances trading under the brand name ao.com
  • Aktsionernoye Obschestvo or Aktsionernoye Obshchestvo (акционерное общество), a type of Russian corporate entity; see open joint-stock company
  • Athletics Ontario, formally Ontario Track and Field Association (OTAF)
  • Australian Airlines (IATA code AO)

Government and politics

Military

Philosophy and religion

Science and technology

Surnames and initials

Other uses

See also

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