| Student Physical Therapist Assistant | Academic & Science |
| Southern Pressure Treaters Association | Business |
| Student Physical Therapy Association | Business |
| Shanghai Pharmaceutical Trade Association | Business |
| Student Parent Teacher Association | Business |
| Semi Parametric Test For Association | Business |
| St Petersburg Telegraph Agency | Business |
| School Partnership Trust Academies | Community |
| Saudi Physical Therapy Association | Community |
| South Philadelphia Tennis Association | Community |
| Surrey Primary Teachers Association | Community |
| Scottish Primary Teachers' Association | Community |
| Silicon Prairie Technology Association | Community |
| Swiss Professional Tennis Association | Community |
| Shortest Path Topology Algorithm | General |
| Solid Propulsion Test Article | General |
| Salisbury Plain Training Area | General |
| Sekolah Perhutanan Tropika Antarabangsa | General |
| Said Person Of That Ability | General |
| St Peter the Apostle | General |
| Spacial Peak Time Average | General |
| Safe Point Thinning Algorithm | General |
| Spare Parts Tools and Accessories | General |
| Strategic Planning And Technical Assistance | Governmental |
| Strathclyde Passenger Transport Authority | Governmental |
| Sshanghai Professional Testing Authority | Governmental |
| Seattle Public Transit Authority | Governmental |
| Seattle Popular Transit Authority | Governmental |
| Special Transitional Addition | Governmental |
| Sports and Physical Therapy | Medical |
| Space Peak Time Average | Medical |
| Seed Production Technology for Africa | Regional |
| Nauta, Peru | Regional |
| Sport Program Technical Assembly | Sports |
| Sports and Physical Therapy Associates | Sports |
| Sports Physical Therapy Associates | Sports |
