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Cos, COS, CoS, or Cos. may refer to:

Mathematics, science and technology[edit]



  • Chief of Staff, the coordinator of the supporting staff of an organization
  • Chief of Station, an official appointed as chief of a stationary post
  • Chief of Station, also known as resident spy, the chief spy operating in a foreign nation
  • Roman consul, the highest elected political office of the Roman Republic and the Empire

Organizations, societies and churches[edit]


  • Cos lettuce, a variety of lettuce
  • CoyotAir (airline designator code), from Spain
  • Cost of sales, the direct costs attributable to the production of the goods sold by a company
  • Chicks on Speed, an electropop group which started in Munich
  • Martín Perfecto de Cos (1800–1854), 19th-century Mexican general, brother in law of Presidente & General Antonio Lopez de Santa Anna
  • COS (Collection of Style), a fashion line by H&M
  • A nickname for comedian Bill Cosby
  • An old pet form for "cousin"
  • Informal abbreviation for the book Harry Potter and the Chamber of Secrets
  • Cos., the abbreviation for "companies"
  • CoS, Chance of Success, used in oil and gas exploration to give an indication of the chance of finding commercial oil/gas reserve
  • COS (Confirm On Site), can be used in technical drawings to specify that a dimensions needs to be confirmed with specific site measurements.

See also[edit]