C
| C4I | Command, Control, Communications, Computer, and Intelligence | 
| CAN  | Correlation Analyst | 
| CARS  | Contingency Airborne Reconnaissance System | 
| CAOC  | Combined Air Operations Center | 
| CBRN  | Chemical, Biological, Radiological, or Nuclear | 
| CCC | Combat Crew Communications | 
| CDC  | Career Development Course (AF) | 
| CMIS  | Computer Management Information Systems | 
| CIGSS  | Common Imagery Ground/Surface System | 
| C&I  | Communications & Information | 
| CNVT | Computer Network Vulnerability Team | 
| COS  | Communications Operations Segment  | 
| CSAR  | Combat Search and Rescue  | 
| CSEP | Communications Standardization and Evaluation Program | 
D
| DCGS | Deployable Common Ground Station Distributed Common Ground Systems | 
| DCM-M | Deployable Communications Module, Mike | 
| DDS | Defense Dissemination System | 
DE DE-D | Dissemination Element Dissemination Element-Deployable | 
| DEROS | Date Eligible to Return from Overseas | 
| DGS | Deployable Ground Station Distributed Ground Station | 
| DGIF | Deployable Ground Intercept Facility | 
| DLIP | Data Link Improvement Program | 
| DISA | Defense Information Systems Agency | 
DISC | DCGS Integration Support Contractor | | DODIIS | Department of Defense Intelligence Information System | 
| DTS | Deployable Transit-cased System |