| Abbreviation | Definition |
|---|---|
| CARM | Christian Apologetics Research Ministries |
| CARM | The Christian Aplologetics And Research Ministry |
| CARN | Canadian Analogue Research Network |
| CARN | Carncounty Archives Research Network |
| CARN | Collaborative Action Research Network |
| CARN | Conservation Action Research Network |
| CARN | County Archive Research Network |
| CARN | County Archives Research Network |
| CARN | The Cambridge Action Research Network |
| CARO | Computer Antivirus Research Organization |
| CARP | Cardiac Arrhythmia Research Package |
| CARPA | Craft Advanced Research Projects Agency |
| CARR | China Advanced Research Reactor |
| CARTI | Central Asian Research and Training Initiative |
| CASAR | Center for Adolescent Substance Abuse Research |
| CASAR | Center for American Studies and Research |
| CASPAR | Compact Accelerator System for Performing Astrophysical Research |
| CASPER | Community Action on Suicide Prevention Education Research |
| CASPER | The Callaway Advanced Scalable Parallel Environment For Research |
| CASR | Center for Applied Social Research |