| Acronym | Definition |
|---|
| CCU | Coronary Care Unit |
| CCU | Coastal Carolina University (Conway, SC, USA) |
| CCU | CAP (Communications Access Point) Channel Unit |
| CCU | Colorado Christian University (Lakewood, CO, USA) |
| CCU | Centro Cultural Universitario (Spanish: University Cultural Center; Mexico) |
| CCU | Critical Care Unit |
| CCU | Camera Control Unit |
| CCU | Cardiac Care Unit |
| CCU | Central Control Unit |
| CCU | Cincinnati Christian University |
| CCU | Compañía Cervecerías Unidas (Santiago, Chile brewery) |
| CCU | Cyber Consequences Unit (US Department of Homeland Security) |
| CCU | Computer Crime Unit (NSSOG) |
| CCU | Concurrent Users |
| CCU | Communication Control Unit |
| CCU | Climate Control Unit |
| CCU | Common Control Unit |
| CCU | Convention Collective Unique (French: Single Collective Agreement) |
| CCU | Computer Control Unit |
| CCU | Catalytic Cracking Unit |
| CCU | Calcutta, India - Calcutta (Airport Code) |
| CCU | Centre Catholique Universitaire (French: University Catholic Center) |
| CCU | Confederation of Canadian Unions |
| CCU | Cache Control Unit (Wyse) |
| CCU | Civil Contingencies Unit (UK) |
| CCU | Correctional Custody Unit |
| CCU | Channel CODEC Unit (3GPP) |
| CCU | Case Coordination Unit |
| CCU | Cell Culture Unit (space station scientific payload; Space Station Biological Research Project) |
| CCU | Comité Consultatif des Unités (French: Consultative Committee for Units; International Committee for Weights and Measures) |
| CCU | Customer Control Unit |
| CCU | Council on Christian Unity |
| CCU | Charge Control Unit |
| CCU | Communauté de Communes de l'Uzège (French municipality) |
| CCU | Cardio Care Unit |
| CCU | Cable Control Unit (Motorola) |
| CCU | Correspondence Control Unit (US Department of Education) |
| CCU | Command Center Upgrade |
| CCU | Compact Computer Unit |
| CCU | Converter Control Unit (aviation) |
| CCU | Configuration Control Unit |
| CCU | Console Control Unit |
| CCU | CDMA Channel Unit |
| CCU | Crewman Communications Umbilical (NASA) |
| CCU | Communication Collaborative Unifiée (French: Unified Collaborative Communications; telecommunications) |
| CCU | Contrôle de Compte Utilisateur (French: User Account Control) |
| CCU | Communications Carrier Unit (NASA) |
| CCU | Corporate Communication Unit (UK) |
| CCU | Custom Configured Unit |
| CCU | Carrier Control Unit (Cannon Technologies, Inc.) |
| CCU | Crew Communications Umbilical |
| CCU | Cornu Cervi Ustum (Burnt Deer Antler, codices and manuscripts) |
| CCU | Cross-Category Unit (retail) |
| CCU | Commodore Convoy Unit |
| CCU | Cash Cost per Unit (Sprint) |
| CCU | Consumer's Control Unit |
| CCU | Cahier des Charges Utilisateur (French: User Specification) |
| CCU | Customer Consumer Unit (electrical installation; UK) |
| CCU | Carbon Capture and Utilization (energy industry) |
| CCU | Cargo Containment Unit |
| CCU | Campus and Community United (California) |
| CCU | Creative Concepts Unlimited (Los Osos, CA) |