| Abbreviation | Definition |
|---|---|
| CLT | Closed Loop Test |
| CLV | Crew Launch Vehicle |
| CM | Cargo Management |
| CM | Center of Mass |
| cm | CentiMeter |
| CM | Command Module (Apollo) |
| CM | Common Module |
| CM | Consumables Management |
| CM | Continuous Memory |
| CM | Control Monitor |
| CM | Crew Module |
| CM&S | Communications Maintenance and Storage |
| CMA | Configuration Management Accounting |
| CMA | Cylindrical Mirror Assembly |
| CMACS | Central Monitor And Control System |
| CMAO | Contract Management Assistance Officer |
| CMAT | Compatible MATerials |
| CMC | Command Module Computer |
| CMC | Crew Module Computer |
| CMDDCDR | CoMmanD DeCoDeR |