| Social Science Computing Association | Academic & Science |
| Student Specific Corrective Action | Academic & Science |
| Statistical Service Corporation of Austin | Business |
| Sunnyvale Sister City Association | Community |
| Seven Seas Cruising Association | Community |
| Southern States Communication Association | Community |
| Southern States Correctional Association | Community |
| Springdale School Community Association | Community |
| Southern Shores Civic Association | Community |
| Southern Street Car Association | Community |
| Sport Stamps Collectors Association | Community |
| Standard Schnauzer Club of America | Community |
| State of the Startup Community Address | Community |
| Shining Stone Community Action | Community |
| South Shore Christian Academy | Community |
| Saint Saviour Catholic Academy | Community |
| St Saviour Catholic Academy | Community |
| Software and Supply Chain Assurance | Computing |
| State Secretariat of Civil Aviation | General |
| Simulated Sports Car Association | General |
| Suzuki Swift Club Australia | General |
| Santander Street Circuit Association | General |
| Saloon Stock Car Association | General |
| Server Side Click Across | General |
| Sign Square Contour Algorithm | General |
| Statistics, Surveillance, and Control Archive (CDC) | Governmental |
| Static State Control Area | Governmental |
| Surface Sampler Control Assembly | Governmental |
| Safe Schools Coalition Australia | Regional |
