Cos, COS, CoS, "coS" or Cos. might refer to:

Mathematics, science and technology

Medicine

Places

Roles

  • 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, additionally 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

Other