SSDN
| Acronym | Definition |
|---|---|
| SSDN | Scottish Schools Digital Network (Scotland, UK) |
| SSDN | Stay Strong Dopey Nation |
| SSDN | South Side Day Nursery (St. Louis, MO) |
| SSDN | Shri Satguru Devay Namah (Indian religious group) |
| SSDN | Stylus Studio Developer Network (Progress Software Corporation) |
| SSDN | Simple Service Discovery for .NET |
| SSDN | Sun Synchronous Day/Night |
| SSDN | Same Stuff Different Name (polite form) |