Cao

Cao or CAO may refer to:

Mythology

 * Cao (bull), a legendary bull in Meitei mythology

Companies or organizations

 * Air China Cargo, ICAO airline designator CAO
 * CA Oradea, Romanian football club
 * CA Osasuna, Spanish football club
 * Canadian Association of Orthodontists
 * Central Allocation Office, cross border electricity transmission capacity auction office
 * Central Applications Office, Irish organisation that oversees college applications
 * Civil Aviation Office of Poland
 * Iran Civil Aviation Organization
 * Office of the Chief Administrative Officer of the United States House of Representatives
 * Compliance Advisor/Ombudsman, accountability arm of the World Bank
 * Council for Adult Education, later Centre for Adult Education, in Victoria, Australia

Job titles

 * Chief Academic Officer of a University, often titled the Provost
 * Chief accounting officer of a company
 * Chief administrative officer of a company
 * Chief analytics officer of a company
 * Compliance Advisor/Ombudsman, an independent office that reviews complaints

Names

 * Cao (Chinese surname) (曹)
 * Cao (Vietnamese surname)

People

 * Cao (footballer, born 1968), Portuguese footballer
 * Cao Cao (died 220), founder of Cao Wei, China
 * Cao Hamburger (born 1962), Brazilian director, screenwriter and producer
 * Cao Pi (c.187–226), emperor of Cao Wei, China
 * Cao Yu (1910–1996), Chinese playwright
 * Cao Yupeng (born 1990), Chinese snooker player
 * Carlos Alberto Caó (1941–2018), Brazilian activist, lawyer, and politician
 * Diogo Cão, a 15th-century Portuguese explorer
 * Joseph Cao (born 1967), United States politician
 * Lady of Cao, a Moche mummy, Peru
 * Longbing Cao (born 1969), data scientist

Places

 * Cao (state), a Chinese vassal state of the Zhou Dynasty (1046 - 221 BCE)
 * Cao County, Shandong, China
 * Cao Wei, also called Wei, one of the regimes that competed for control of China during the Three Kingdoms period (220 - 280 CE)

Other uses

 * CaO, the chemical symbol for calcium oxide
 * Cão!, an album by Portuguese band Ornatos Violeta
 * CA Osasuna, a Spanish sport club
 * a Child Arrangement Order under English family law
 * Chlorophyllide-a oxygenase, an enzyme
 * Cold air outbreak, an intense and/or prolonged cold weather wave of air
 * Controller Access Object, as described in the ORiN robot interface