| 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) |