| California Coast University | Academic & Science |
| Colorado Christian University | Academic & Science |
| Coastal Carolina University | Academic & Science |
| Corporate Counsel University | Academic & Science |
| Cincinnati Christian University | Academic & Science |
| Collective Cognitive Unconscious | Academic & Science |
| Coastal Carolina University Coastal Carolina University | Academic & Science |
| Chicago Cubs University | Academic & Science |
| Kolkata (calcutta) | Airport Code |
| Clear Channel Communications | Business |
| Cobar Consolidated Resources Ltd | Business |
| Cowlitz Credit Union | Business |
| Cornerstone Credit Union | Business |
| Coventry Credit Union | Business |
| Cloverbelt Credit Union | Business |
| College Credit Union | Business |
| Capitol Credit Union | Business |
| Champion Credit Union | Business |
| City Credit Union | Business |
| California Credit Union | Business |
| Chester Credit Union | Business |
| Consumers Credit Union | Business |
| Community Credit Union | Business |
| Commonwealth Credit Union | Business |
| Colorado Credit Union | Business |
| Columbia Credit Union | Business |
| Carbon Capture and Utilisation | Chemistry |
| Chinese Culture University | Community |
| Centra Credit Union | Community |
| Colorado Credit Union Colorado Credit | Community |
| Colorado Christian | Community |
| Corning Credit Union | Community |
| Consumer Credit Union | Community |
| Consultative Committee for Units | Community |
| Ccd Control Unit | Computing |
| Central Computing Unit | Computing |
| Cache Control Unit | Computing |
| Charge Control Unit | Computing |
| Computer Crime Unit | Computing |
| Communications Control Unit | Computing |
| Clock Control Unit | Computing |
| Chromecast Ultra | Computing |
| Communication Control Unit | Computing |
| Christian Computer Users | Computing |
| Cloud computing user | Computing |
| Cyber Consequences Unit | Computing |
| Computer Control Unit | Computing |
| Code Compile Unit | General |
| Coach Control Unit | General |
| Car Communication Unit | General |
| Chassis Control Unit | General |
| Cruise Control Unit | General |
| Cargo Carrying Unit | General |
| Climate Control Unit | General |
| Corvette Club of Utah | General |
| Connectivity Control Unit | General |
| Clutch Control Unit | General |
| Combined Charging Unit | General |
| Christ Centered Unschooling | General |
| Content Control Utility | General |
| Coastal Carolina | General |
| Central Collection Unit | General |
| Comunidad Cristiana Universitaria | General |
| Counter Chicken Unit | General |
| Central Coast Underground | General |
| Compania Cervecerias Unidas | General |
| Concurrent Connected User | General |
| Consolidated Commission on Utilities | General |
| Cloud Compute Unit | General |
| Central Contracts Unit | General |
| Core Cluster Unit | General |
| Coronary Care Units | General |
| Commercial Consumptive Use | General |
| Carbine Conversion Unit | General |
| Crew Compartment Umbilical | General |
| Cargo Carrying Units | General |
| Clean Catch Urine | Governmental |
| Cyber Crime Unit | Governmental |
| Cardiac Care Unit | Healthcare |
| Coronary Care Unit | Medical |
| Comprehensive Care Unit | Medical |
| colpocystourethrography | Medical |
| Consistent Condom Use | Medical |
| Comfort Care Unit | Medical |
| Critical Care Unit | Medical |
| Cardio Care Unit | Medical |
| Clueless Computer User | Messaging |
| Common Control Unit | Military and Defence |
| Corrective Custody Unit | Military and Defence |
| Cockpit Control Unit | Military and Defence |
| Component Control Unit | Military and Defence |
| Cargomaster Computer Unit | Military and Defence |
| Calcutta, India | Regional |
| Charlotte County Utilities | Regional |
| Computer Center Unix | Softwares |
| Camera Control Unit | Space Science |
| Central Control Unit | Space Science |
| Communications Carrier Unit | Space Science |
| Crewman Communications Umbilical | Space Science |
| Netaji Subhas Chandra Bose International Airport | Transport & Travel |
