CUO

CUO may refer to:


 * Cadet Under Officer rank in Senior Division & Senior Women Army wings of the National Cadet Corps (India)
 * CuO - Copper(II) oxide
 * COU is the ICAO airline designator for Aerocuahonte, Mexico
 * Compaq Users Organisation
 * Cadet Under Officer in the Australian Army Cadets
 * Cadet Under Officer in the Australian Air Force Cadets

Refer also:


 * King Cuo of Zhongshan

CUO-abbreviation of Chief Underwriting Officer used in insurance company or top underwriting occupation of an insurance company