| Abbreviation | Definition |
|---|---|
| CSC | Common Signaling Channel |
| CSDU | Core Service Data Unit |
| CSF | Common Service Framework |
| CSL | Communication Services Limited |
| CSL | Create a Simple Life |
| CSMA | Carrier Sense Multiple Access |
| CSP | Callback Service Provider |
| CSP | Cloud Service Provider |
| CSP | Communications Service Provider |
| CSP | Continuous Speech Processing |
| CSP | Converged Service Platform |
| CSP | Custom SIM Profile |
| CS-PDU | Convergence Sub-layer Protocol Data Unit |
| CSPRM | Common Signaling Protocols Resource Module |
| CSR | Customer Service Request |
| CSS | Customer Service System |
| CSTA | Computer Supported Telecommunications Applications |
| CSUR | ConScript Unicode Registry |
| CSV | Circuit Switched Voice |
| CT | Channel Termination |