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 Compliance Advisor/Ombudsman

Job titles

*Chief Academic Officer of a University, often titled the Provost (education), 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 *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 {{disambiguation