Cao

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