COO

COO or coo may refer to:

Business

 * Certificate of origin, used in international trade
 * Chief operating officer or chief operations officer, high-ranking corporate official
 * Concept of operations, used in Systems Engineering Management Process
 * Country of origin, a representative to the country or countries of manufacture, production, design, or brand origin where an article or product comes from

Communication

 * Cell of origin (telecommunications)
 * "Coo", the call of pigeons and doves

People

 * Coo Coo Cal (Calvin Bellamy, born 1970), American rapper
 * Coo Coo Marlin (1932–2005), racing driver

Science

 * Carboxylate, type of anion
 * Cobalt(II) oxide, chemical with formula of CoO

Places

 * Coo, the former Italian name for the Dodecanese island Kos, now in Greece, off the coast of Turkey
 * Calgary Olympic Oval, a Canadian ice rink
 * COO, the IATA code for Cadjehoun Airport in Cotonou, Benin
 * COO, the National Rail code for Cookham railway station in the county of Berkshire, UK

Other uses

 * Daihatsu Coo, a 2006–2012 Japanese subcompact hatchback
 * Summer Days with Coo, a 2007 Japanese animated film
 * The Cooper Companies, a medical device company which trades on the NYSE as COO