| Abbreviation | Definition |
|---|---|
| CSA | Certified Senders Alliance |
| CSAT | Canton-Protocol Strategic Alliance Treaty |
| CSGA | California State Genealogical Alliance |
| CSGA | Cyber Security Global Alliance |
| CSIA | Canadian Ski Instructors' Alliance |
| CSIA | Community Services Industry Alliance |
| CSIA | Cyber Security Industry Alliance |
| CSRA | Civil Service Rainbow Alliance |
| CSRA | Construction Safety Research Alliance |
| CSTA | Community Schools Transformation Alliance |
| CSWA | California Sustainable Winegrowing Alliance |
| CTA | Counter Terrorism Alliance |
| CTA | Cyber Threat Alliance |
| CTHA | Common Table Health Alliance |
| CTRA | Clinical Trials Research Alliance |
| CTTA | Clean Technology Trade Alliance |
| CVA | Curatores Veritatis Alliance |
| CVAAS | Central Valley Alliance of Atheists and Skeptics |
| CVHA | Catawba Valley Heritage Alliance |
| CVMSA | Central Valley Math Science Alliance |