| Abbreviation | Definition |
|---|---|
| CSNS | Canadian Society for Nutritional Sciences |
| CSNS | Central States Numismatic Society |
| CSNS | Council of State Neurosurgical Societies |
| CSNS | Société Canadienne des Sciences de la Nutrition |
| CSNS | Socit Canadienne des Sciences de la Nutrition |
| CSO | Civil Society Organisations |
| CSO | Civil Society Organization |
| CSO | Civil society organizations |
| CSOA | Civil Society Organization Authority |
| CSOA | Civil Society Organizations Authority |
| CSOFF | Civil Society Organization Fund Facility |
| CSOH | Canadian Society of Homeopaths |
| CSOS | Chinese Speaking Orthopaedic Society |
| CSOS | Civil Society Organisation Support |
| CSP | California Society of Pathologists |
| CSPB | Canadian Society of Plant Biologists |
| CSPD | California Society of Pediatric Dentistry |
| CSPE | California Society of Professional Engineers |
| CSPE | Connecticut Society of Professional Engineers |
| CSPF | Civil Society Policy Forum |