| Abbreviation | Definition |
|---|---|
| CMSI | Checkout/control and Monitor Sub-system Interface |
| CMTS | Computerized Maintenance Test System |
| CMV | Common Mode Voltage |
| CN | Change Notice |
| CNDS | CoNDenSate |
| CNRL | Communications and Navigation Research Laboratory |
| CNRS | Centre National de la Recherche Scientifique |
| CNSL | CoNSoLe |
| CNTL | Control |
| CNTR | CouNTeR |
| CNTRL | Control |
| CNTRLR | CoNTRoLleR |
| CNWDI | Critical Nuclear Weapons Design Information |
| CO | Cargo Operations Directorate |
| CO | Change Order |
| CO | CutOff |
| COA | Center Operations Area |
| COAM | Customer Owned And Maintained |
| COAS | Course Optical Alignment Sight |
| COAS | Crewman Optical Alignment Sight |