| SSSC | Science Student Success Centre 
| Others |
| SSSC | Scottish Social Services Council
| Others |
| SSSC | Self Service Supply Center
| Others |
| SSSC | Semjase Silver Star Center
| Others |
| SSSC | Senior Secondary School Certificate
| Others |
| SSSC | Senior Services of Snohomish County
| Others |
| SSSC | Silja Symphony Song Contest
| Others |
| SSSC | Single Sideband Suppressed Carrier
| Others |
| SSSC | Sitka Sound Science Center
| Others |
| SSSC | Small Sagittarius Star Cloud
| Others |
| SSSC | SOFIA Science Steering Committee
| Others |
| SSSC | Solar System Science Collaboration
| Others |
| SSSC | Southwest Student Services Corporation
| Others |
| SSSC | Speech Sign Success Center
| Others |
| SSSC | Speed School Student Council
| Others |
| SSSC | Spread Spectrum Security Code
| Others |
| SSSC | Staff Scientist Staff Clinician
| Others |
| SSSC | Stainless Steel Scissor Carts
| Others |
| SSSC | Stainless Steel Separation Conveyor
| Others |
| SSSC | Static Series Synchronous Compensator
| Others |
| SSSC | Static Synchronous Series Compensator
| Others |
| SSSC | Storm Sewer System Charge
| Others |
| SSSC | Street Sweeper Social Club
| Others |
| SSSC | Student Support Services Center
| Others |
| SSSC | Student Systems Steering Committee
| Others |
| SSSC | Sunday Spot Social Circle
| Others |
| SSSC | Super Sativa Seed Club
| Others |
| SSSC | Super Secret Stamp Club
| Others |
| SSSC | Superior Shoulder Suspensory Complex
| Others |
| SSSC | Supreme State Security Court
| Others |
| SSSC | Surface Ship Support Center
| Others |
| SSSC | Surface Subsurface Surveillance Coordination
| Others |
| SSSC | Surface, Subsurface Search Surveillance Coordination
| Others |
| SSSC | Suzuki Swift Sport Cup
| Others |
| SSSC | Synchronous Static Series Compensator
| Others |