Cao 5365083 216882138 2008-06-03T17:27:28Z 77.179.153.178 '''Cao''', '''CaO''', or '''CAO''' can mean: * [[Calcium oxide]], also known as lime * [[Chief Administrative Officer]] * [[Cao Wei]], also called '''''Wei''''', one of the regimes that competed for control of China during the [[Three Kingdoms]] period. ** [[Cao Cao]], founder of '''Cao Wei''' * ''Cao'' (曹), a Chinese family name, see also [[Cao Cao#The Cao clan]] * [[Diogo Cão]], a Portuguese explorer in the 15th century * [[Cao Cao (song)]] * [[Cao Cao (JJ Lin album)]] * ''CAO'' is a mnemonic used to teach [[trigonometry]], showing that [[cotangent]] is the [[ratio]] of [[adjacent]] over [[opposite]]. {{disambig}} [[de:Cao]] [[pt:Cao (desambiguação)]] [[vi:Cao]]