| CSDL | Center for Self Directed Learning 
| Others |
| CSDL | Center for the Study of Digital Libraries
| Others |
| CSDL | Central Securities Depository of Lithuania
| Others |
| CSDL | Charles Stark Draper Laboratory
| Others |
| CSDL | Child Safety Door Locks
| Others |
| CSDL | Cisco Secure
| Others |
| CSDL | Cisco Secure Development Lifecycle
| Others |
| CSDL | Coast Survey Development Lab
| Others |
| CSDL | Coast Survey Development Laboratory
| Others |
| CSDL | Coastal Survey Development Lab
| Others |
| CSDL | Collaborative Software Development Laboratory
| Others |
| CSDL | Colorado Springs Dart League
| Others |
| CSDL | Combined Systems Development Laboratory
| Others |
| CSDL | Commission scolaire de Laval
| Others |
| CSDL | Common Schema Definition Language
| Others |
| CSDL | Complex Systems Design Lab
| Others |
| CSDL | Compliant Systems Design Laboratory
| Others |
| CSDL | Computer Society Digital Library
| Others |
| CSDL | Computer System Description Languages
| Others |
| CSDL | Conceptual schema definition language
| Others |
| CSDL | Conceptual Storage Definition Language
| Others |
| CSDL | Curated Stream Definition
| Others |