| Abbreviation | Definition |
|---|---|
| CRG | Change Review Group |
| CRG | Correspondence Review Group |
| CRIS | Calibration Recall and Information System |
| CRISM | Compact Reconnaissance Imaging Spectrometers for Mars |
| CRIT | CRITical |
| CRM | Chemical Release Module |
| CRMD | Computer Resources Management Data |
| CRN | Contract Revision Number |
| CRO | Cathode Ray Oscilloscope |
| CRP | Configuration Requirements Processing |
| CRPL | Cosmic Ray Physics Laboratory |
| CRR | Cable Routing Rotation |
| CRR | Computer Run Report |
| CRR | Critical Requirements Review |
| CRRES | Combined release and radiation effects satellite |
| CRS | CO2 Reduction Subsystem |
| CRS | Counter Rotation Scanner |
| CRS | CouRSe |
| CRS | CRosS |
| CRSFD | CRosSFeeD |