CCU

• Coronary care unit, a hospital wing meant for monitoring patients with heart problems
• Critical care unit, in a hospital (UK terminology), similar to intensive care unit (ICU) in other countries; or, a unit that provides higher care than an ICU does

• Camera control unit, for a video camera
• Carbon capture and utilization, capturing {{CO2}} emissions and using the captured gas for a practical purpose
• Customer Configuration Updating, a software development method
• Concurrent users, number of users using the application simultaneously

• California Coast University, a university in Santa Ana, California, USA
• Chaudhary Charan Singh University, a University in Meerut, Uttar Pradesh [UP], India
• Chinese Culture University, a university in Taipei, Taiwan
• Cincinnati Christian University, a university in Cincinnati, Ohio, USA
• Coastal Carolina University, a university in Horry County, South Carolina, USA
• Colorado Christian University, a liberal arts college in Lakewood, Colorado, USA
• National Chung Cheng University, a public university in Chiayi, Taiwan
• National Chengchi University, a public university in Taipei, Taiwan

• Cambodian Confederation of Unions, a Cambodian national trade union centre
• Compañía de las Cervecerías Unidas, a Chilean drinks and beer company
• Common Cold Unit
• Confederation of Canadian Unions, a labour union central in Canada
• Commonwealth Credit Union, a financial institution in Kentucky
• Correctional Custody Unit, United States Marine Corps

• Netaji Subhash Chandra Bose International Airport (Kolkata Airport, IATA code CCU), formerly known as Dum Dum Airport, located in Dum Dum, India
• CCU, a codon for the amino acid proline

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