SSSR
| Acronym | Definition |
|---|---|
| SSSR | Support Security Sector Reform (UN) |
| SSSR | Society for the Scientific Study of Religion |
| SSSR | Society for the Scientific Study of Reading |
| SSSR | Smallest Set of Smallest Rings (chemistry) |
| SSSR | Sojus Sowjetskich Sozialistitscheskich Respublik (USSR; Russian) |
| SSSR | Space to Space Station Radio |
| SSSR | Switch and Signaling System Requirements |
| SSSR | Svaz Sovetskych Socialistickych Republik |