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.
Coopers Brewery Limited, the largest Australian-owned brewery, is based in the Adelaide suburb of Regency Park.
Cooking bananas are banana cultivars in the genus Musa whose fruits are generally used in cooking. Plantains 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.
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.
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.
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.
Cook County is a county in the U.S. state of Illinois. It is the second-most populous county in the United States after Los Angeles County, California.
Coos Bay (Coos language: Atsixiis) is a city located in Coos County, Oregon, United States, where the Coos River enters Coos Bay on the Pacific Ocean.