| Acronym | Definition |
|---|
| CCN | Cloud Condensation Nuclei |
| CCN | Church Communication Network |
| CCN | Conseil Canadien des Normes (Standards Council of Canada) |
| CCN | Cyclin |
| CCN | Critical Care Nurse |
| CCN | Catholic Communications Network |
| CCN | Certified Clinical Nutritionist |
| CCN | Community Care Network |
| CCN | Center for Civic Networking |
| CCN | Cardiac Care Network |
| CCN | Center for Cognitive Neuroscience (University of Pennsylvania) |
| CCN | Council of Churches in Namibia |
| CCN | Canadian Corporate News |
| CCN | Carrier Comfort Network (HVAC) |
| CCN | Certified Contractors Network |
| CCN | Carrying Capacity Network |
| CCN | County Councils Network (Special Interest Group within the Local Government Association, UK) |
| CCN | Command and Control North (Vietnam, US special forces unit) |
| CCN | Category Control Number (Underwriters Laboratories) |
| CCN | Contract Change Notice |
| CCN | Constabulary Communication Network |
| CCN | Caribbean Communications Network |
| CCN | Claim Control Number (Medicare tracking number) |
| CCN | China Commodity Net |
| CCN | Canadian Cohousing Network |
| CCN | Colorectal Cancer Network |
| CCN | Case Control Number |
| CCN | Chemical Consultants Network |
| CCN | Community Chat Network (IRC) |
| CCN | Chemistry Contact Network |
| CCN | Companhia Colonial de Navegação (Lisbon, Portugal steamship company) |
| CCN | Credit Cards Now |
| CCN | Calling Card Number |
| CCN | Croatian Commercial Network |
| CCN | Configuration Change Notice |
| CCN | Content-Centric Networking |
| CCN | Computer Communications Network |
| CCN | Continuous Control Node (Cisco) |
| CCN | Cerebro Cortical Necrosis |
| CCN | Common Core Network (IPv6) |
| CCN | Control-Connection-Notification |
| CCN | Common Control Node |
| CCN | Contract Change Notification |
| CCN | Certified Critical Care Nurse |
| CCN | Contract Change Negotiation (NASA) |
| CCN | Communauté Chemin Neuf (Chemin Neuf Community; Lyon, France) |
| CCN | Cell Change Notification (network assisted cell change procedure in GSM/GPRS networks) |
| CCN | Consistent Checkpoint Number |
| CCN | Change Control Number |
| CCN | Category Code Number |
| CCN | Copper Cable Network (Afghanistan) |
| CCN | Classification Change Notice |
| CCN | Cooperative Caring Network |
| CCN | Cross-Connect Network (AT&T) |
| CCN | Command Center Network |
| CCN | Construction Change Notice |
| CCN | Customer Coordination Node |
| CCN | Comcast Cable Network |
| CCN | Criminal Case Number (police report) |
| CCN | Cisco Content Networking Architecture (Cisco) |
| CCN | Contract Completion Notice |
| CCN | COMSEC Controlling Node |
| CCN | Continental Control Network |
| CCN | Crittenden Connection Networks |
| CCN | Commercial Circuit Number |