| Abbreviation | Definition |
|---|---|
| CSB(OC) | Customer Support Branch (Office of the Commissioner) |
| CSB(ORA) | Customer Support Branch (Office of Regulatory Affairs) |
| CSC | Centre for Surveillance Coordination |
| CSC | Cigarette Smoke Concentrate |
| CSC | Computational Science Center |
| CSDD | Center for the Study of Drug Development (Tufts University) |
| CSF | CerebroSpinal Fluid |
| CSG | Counterterrorism Security Group |
| CSI | Consumer Safety Inspector |
| CSM | Committee on Safety of Medicines |
| CSO | Consumer Safety Officer |
| CSPDB | Circulatory Support and Prosthetic Devices Branch |
| CSPDB(CDRH) | Circulatory Support and Prosthetic Devices Branch (CDRH) |
| CSPI | Center for Science in the Public Interest |
| CSR | Center for Scientific Review |
| CSR | Clinical Study Report |
| CSR | Customer Service Record |
| CSR | Customer Service Representative |
| CSREES | Cooperative State Research, Education, and Extension Services |
| CSS | Controlled Substance Staff |