| 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 |