SFSI
| Acronym | Definition |
|---|---|
| SFSI | San Francisco Sex Information |
| SFSI | Soil-Foundation-Structure Interaction (Garner Valley Digital Array; California) |
| SFSI | Santa Fe Science Initiative (est. 2001; Santa Fe, NM) |
| SFSI | San Francisco Society of Illustrators (San Francisco, CA) |
| SFSI | SWIR (Short Wave Infrared) Full Spectrum Imager (Canadian Centre for Remote Sensing) |