| CHSS | California Home School Sports 
| Others |
| CHSS | Cariboo Hill Secondary School
| Others |
| CHSS | Cat Hair and Skin Scraping
| Others |
| CHSS | Catholic Home Study Service
| Others |
| CHSS | Center for Human Sexuality Studies
| Others |
| CHSS | Central Hospital Supply Services
| Others |
| CHSS | Centre for Health Services Studies
| Others |
| CHSS | Centre Hastings Secondary School
| Others |
| CHSS | Century Halo Star Survey
| Others |
| CHSS | Certified Healthcare Security Supervisor
| Others |
| CHSS | Charles Hays Secondary School
| Others |
| CHSS | Chest Heart Stroke Scotland
| Others |
| CHSS | Cincinnati Hills SAY Soccer
| Others |
| CHSS | Clarkstown High School South
| Others |
| CHSS | College of Health and Social Sciences
| Others |
| CHSS | College of Health and Social Services
| Others |
| CHSS | College of Health Social Sciences
| Others |
| CHSS | College of Humanities and Social Science
| Others |
| CHSS | Combat Health Support System
| Others |
| CHSS | Comm Health Soc Srvcs
| Others |
| CHSS | Communication Humanities Social Sciences
| Others |
| CHSS | Community Health and Social Sciences
| Others |
| CHSS | Community Housing and Shelter Services
| Others |
| CHSS | Comparative Historical Social Science
| Others |
| CHSS | Comparative Historical Social Sciences
| Others |
| CHSS | Conceptual and Historical Studies of Science
| Others |
| CHSS | Congenital Heart Surgeons Society
| Others |
| CHSS | Congenital Heart Surgeons' Society
| Others |
| CHSS | Coolant Heat Storage System
| Others |
| CHSS | Corporate Health and Safety Solutions
| Others |