| Abbreviation | Definition |
|---|---|
| SSSI | Safety and Security Services Inc |
| SSSI | Sikorsky Support Services Inc |
| SSSI | Storage Solutions Specialists Inc |
| SST | Sales, Service, and Technology |
| SST | Sega Sound Team |
| SST | State Street Trust Company |
| SSTC | Saskatchewan Scrap Tire Corporation |
| SSTC | Security Service Title Company |
| SSTC | Solidarity Saudi Takaful Company |
| SSTC | South Seas Tuna Corporation |
| SSTC | Support Systems Technology Corporation |
| SSTG | Securities Sales & Trading Group (Freddie Mac) |
| SSTG | Space and Systems Technology Group |
| SSTG | Stanton Street Technology Group |
| SSTI | Simulation Systems Technologies inc |
| SSTL | Singapore Space and Technology Ltd |
| SSTL | Sistema Shyam TeleServices Ltd |
| SSTL | Surrey Satellite Technology US LLC |
| SSV | Shooting Star Video |
| SSV | Sling Shot Venus |