| Short-term Inundation Forecasting of Tsunamis project | Academic & Science |
| Student Initiative Funds for Technology | Academic & Science |
| Students Initiative For Technopreneurship | Academic & Science |
| Specified Investment Flow Through | Business |
| Service Increment For Teaching | Community |
| Summer Institute For Future Teachers | Community |
| Summer Institue For Future Teachers | Community |
| Scheduled Intentional Focused Time | Community |
| Student Initiative Fund for Technology | Community |
| Smart Information Flow Technologies | Computing |
| Sum Index Field Technology | Computing |
| Sender Initiated File Transfer | Computing |
| Signal Integrity Filtering Technology | Computing |
| Security Incident Fusion Tools | General |
| Sensations Images Feelings and Thoughts | General |
| Scanning for Intensely Fluorescent Targets | General |
| Students for ILLiad Freedom Trial | General |
| Scalable Invariant Feature Transform | General |
| Sustainable Inshore Fisheries Trust | General |
| Scale Invariance Feature Transform | General |
| Statutory Instruments Filtering and Tracking | General |
| Selected Ion Flow Tube | General |
| Source Information Flow Toolbox | General |
| Summary of Information on Film and Television | General |
| Shaw Institute for Field Training | Governmental |
| Secure Internet File Transfer | Internet |
| Stanford Information Filtering Tool | Softwares |
| Scale Invariant Feature Transform | Softwares |
| Software Implemented Fault Tolerance | Softwares |
| Sum Index Flow Technology | Technology |
