COO may refer to:
Coordinated Universal Time (French: Temps universel coordonné), abbreviated to UTC, is the primary time standard by which the world regulates clocks and time.
A cooperative (also known as co-operative, co-op, or coop) is an autonomous association of people united voluntarily to meet their common economic, social and cultural needs and aspirations through a jointly owned and democratically controlled business.
Cooking bananas are banana cultivars in the genus Musa whose fruits are generally used in cooking. They may be eaten while ripe or unripe and starchy.
In chemistry, a coordination complex consists of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.
The Cook Islands (/ˈkʊk ˈaɪləndz/; Cook Islands Māori: Kūki 'Āirani) is a self-governing island country in the South Pacific Ocean in free association with New Zealand.
A cooling tower is a heat rejection device that rejects waste heat to the atmosphere through the cooling of a water stream to a lower temperature.
Cooking or cookery is the art, technology and craft of preparing food for consumption with the use of heat.
Cookware and bakeware are types of food preparation containers, commonly found in a kitchen. Cookware comprises cooking vessels, such as saucepans and frying pans, intended for use on a stove or range cooktop.
The Cooper Union for the Advancement of Science and Art, commonly known as Cooper Union or The Cooper Union and informally referred to, especially during the 19th century, as "the Cooper Institute", is a privately funded college located in Cooper Square in the East Village neighborhood of Manhattan, New York City.