| Acronym | Definition |
|---|
| SSSD➣System Security Services Daemon (Fedora software) |
| SSSD➣Scranton State School for the Deaf (Pennsylvania) |
| SSSD➣Single Sided Single Density |
| SSSD➣Siloam Springs School District (Arkansas) |
| SSSD➣Steamboat Springs School District (Colorado) |
| SSSD➣Shanksville-Stonycreek School District (Pennsylvania) |
| SSSD➣Steamin' Schneeman and the Screamin' Demons (band) |
| SSSD➣Strike and Surveillance Systems Division (Northrop Grumman Corporation) |
| SSSD➣Scandinavian Society for the Study of Diabetes |
| SSSD➣SUPSHIP San Diego |
| SSSD➣South Side School District (Pennsylvania) |
| SSSD➣Sovereign-Class Super Star Destroyer (Star Wars) |
| SSSD➣Simple Sound for Small Devices |
| SSSD➣Student Special Services District |
| SSSD➣Small Systems Software Development (Kingsport, Tennessee) |
| SSSD➣Seven Segment Sequence Driver |
| SSSD➣Ship's System Staging Diagram |
| SSSD➣Single Stroke Solid Die |
| SSSD➣Same Stuff Same Day |
| SSSD➣Self-Securing Storage Device |