| Abbreviation | Definition |
|---|---|
| CSDM | Commission Scolaire De Montréal |
| CSEAC | Computer Science Education Advisory Commission |
| CSMB | Commission scolaire Marguerite Bourgeoys |
| CSMB | Commission Scolaire Marguerite-Bourgeoys |
| CSMV | Commission Scolaire Marie-Victorin |
| CSN | Commission Scolaire Nouvelle |
| CSPA | Commission on Staff Policies and Affairs |
| CSRC | China Securities Regulatory Commission |
| CSRL | Commission scolaire René Lévesque |
| CSRN | Commission scolaire de Rouyn Noranda |
| CSSC | California Seismic Safety Commission |
| CSSS | Commission to Strengthen Social Security |
| CSTD | Commission on Science and Technology for Development |
| CSW | Commission on Social Witness |
| CTGC | California Table Grape Commission |
| CTPC | Citizen Trade Policy Commission |
| CTTL | Commission on Technology in Teaching and Learning |
| CTWC | Chu Talas Water Commission |
| CVTI | Commission on Vocational and Technical Instruction |
| CWC | California Water Commission |