| Acronym | Definition |
|---|
| CSSS | Centre de Santé et de Services Sociaux (French: Center for Health and Social Services; Canada) |
| CSSS | Centre for Studies in Social Sciences (India) |
| CSSS | Computer Science Students' Society |
| CSSS | Council of State Science Supervisors |
| CSSS | Comprehensive Student Support System (various locations) |
| CSSS | Canadian Society of Soil Science |
| CSSS | Constellation Space Suit System (NASA) |
| CSSS | Computing Science Student Society (Simon Fraser University; Burnaby, British Columbia, Canada) |
| CSSS | Complex Systems Summer School |
| CSSS | Center for the Study of Sport in Society |
| CSSS | Community Support Skill Standards |
| CSSS | Computer Systems Support Specialist |
| CSSS | Crash Severity Sensing System |
| CSSS | Claim Services Support Supervisor (insurance) |
| CSSS | Composite Social Security Scheme (India) |
| CSSS | Commodore Stockton Skills School (Stockton, CA) |