| CSMS | C Specific Media Support 
| Others |
| CSMS | Camerado Springs Middle School
| Others |
| CSMS | Canadian Society for Mesoamerican Studies
| Others |
| CSMS | Cargo Systems Messaging Service
| Others |
| CSMS | Carl Sandburg Middle School
| Others |
| CSMS | Carl Stuart Middle School
| Others |
| CSMS | Carolina Springs Middle School
| Others |
| CSMS | Carrier Safety Measurement System
| Others |
| CSMS | Cave Spring Middle School
| Others |
| CSMS | Center for Sustainable Materials Science
| Others |
| CSMS | Central Square Middle School
| Others |
| CSMS | Centre Square Montessori Schoolhouse
| Others |
| CSMS | Certified Safety Management Specialist
| Others |
| CSMS | Charlotte Sport Modelers Society
| Others |
| CSMS | Child Support Management System
| Others |
| CSMS | Citrus Springs Middle School
| Others |
| CSMS | College Station Middle School
| Others |
| CSMS | Colonel Smith Middle School
| Others |
| CSMS | Colorado Springs Mineralogical Society
| Others |
| CSMS | Combined Support Maintenance Shop
| Others |
| CSMS | Connecticut State Medical Society
| Others |
| CSMS | Consolidated Support Maintenance Shop
| Others |
| CSMS | Content Switching Module with Ssl
| Others |
| CSMS | Crystal Springs Middle School
| Others |
| CSMS | Customer Service Management System
| Others |
| CSMS | Cyber Security Management System
| Others |
| CSMS | Sociedad Canadiense de Estudios Mesoamericanos
| Others |