| Rank | Abbreviation | Meaning |
|---|
| ***** | SSSR | Space to Space Station Radio
| |
| ***** | SSSR | Society for the Scientific Study of Reading
| |
| ***** | SSSR | Soyuz Sovetskikh Sotsialisticheskikh Respublik
| |
| **** | SSSR | Society for Scientific Study of Religion
| |
| **** | SSSR | Sojuz Sovetskich Socialističeskich Respublik
| |
| **** | SSSR | Smallest Set of Smallest Rings
| |
| *** | SSSR | stimulated salivary secretion rate
| |
| *** | SSSR | Switch and Signaling System Requirements
| |
| *** | SSSR | Svaz Sovetskych Socialistickych Republik
| |
| *** | SSSR | Sojus Sowjetskich Sozialistitscheskich Respublik
| |
| *** | SSSR | schoolwide sustained silent reading
| |
| *** | SSSR | Soyuz Sovyetskikh Sotsialisticheskikh Respublik
| |
| *** | SSSR | Site Specific Standard Request
| |
| *** | SSSR | Soyuz Sovietskikh Sotsialisticheskikh Respublik
| |
| ** | SSSR | Social Scientific Study of Religion
| |
| ** | SSSR | Society for the Scientific Studies of Reading
| |
| ** | SSSR | Single Shuttle Split Ring
| |
| ** | SSSR | Soiuz Sovetskikh Sotsialisticheskikh Respublik
| |
| ** | SSSR | Social Sector Strategy Review
| |
| * | SSSR | Support Security Sector Reform
| |
| * | SSSR | Small Signal Stability Region
| |
| * | SSSR | Scientific Studies of Reading
| |
| * | SSSR | Senior Staff Salary Review
| |
| * | SSSR | Shotgun Shell Size Restrictions
| |
| * | SSSR | Subject Specific Scout Report
| |