| Abbreviation | Definition |
|---|---|
| CSIB | Canadian Sports Insurance Brokers |
| CSIC | Canadian Society of Immigration Consultants |
| CSID | Canadian Social Investment Database |
| CSIDC | Canada Saskatchewan Irrigation Diversification Centre |
| CSIN | Canadian Sustainability Indicators Network |
| CSIS | Canadian Security Intelligence Service |
| CSKA | Canadian Shotokan Karate Association |
| CSLA | Canadian Society of Landscape Architects |
| CSLI | Canadian as a Second Language Institute |
| CSMB | Canadian Society for Molecular Biosciences |
| CSNN | Canadian School of Natural Nutrition |
| CSOA | Canadian Standard on Association |
| CSOH | Canadian Society of Homeopaths |
| CSOP | Canadian School of Peacebuilding |
| CSOR | Canadian Special Operations Regiment |
| CSOT | Canadian Society of Orthopaedic Technologists |
| CSPA | Canadian Sport Parachuting Association |
| CSPB | Canadian Society of Plant Biologists |
| CSPC | Canadian Standard Product Code |
| CSPI | Canadian Scholars' Press Inc |