Cao or CAO may refer to:
Companies or organizations Air China Cargo, ICAO airline designator CAO CA Oradea, Romanian football club CA Osasuna, Spanish football club Canadian Association of Optometrists 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 Commission on Audit
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 Pierre Cao (1937–2026), Luxembourgish composer and conductor
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) Magdalena de Cao, a town on the north coast of Peru, surrounded by major archaeological sites, c. 50km north of the city of Trujillo
Other uses Cao (bull), a legendary bull in Meitei mythology 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