SDSN
| Acronym | Definition |
|---|---|
| SDSN | Sustainable Development Solutions Network (United Nations) |
| SDSN | Secure Data System Network |
| SDSN | Swimmer Detection Sonar Network (joint project) |
| SDSN | Sixth Day and Seventh Night |
| SDSN | Start Doing Something Now |
| SDSN | Seaman, Steward Striker (Naval Rating) |
| SDSN | Standard Data System Network |