CSDN
| Acronym | Definition |
|---|---|
| CSDN | Cisco Self Defending Network |
| CSDN | Circuit Switched Data Network |
| CSDN | Circuit Switched Data Network (ITU) |
| CSDN | Chinese Software Developer Net (China) |
| CSDN | Computer Science Discipline Network (UK) |
| CSDN | Colorado Swing Dance Network |
| CSDN | Customs Secure Data Network |
| CSDN | Colorado Springs Day Nursery (Colorado Springs, CO) |
| CSDN | Commissin Scolaire des Navigateurs (French: School Board of Mariners) |