| Acronym | Definition |
|---|
| DSFI | Discrete Square Root Filter Information |
| DSFI | Distributed Spacecraft Formation Initialization |
| DSFI | Dual Stage Fuel Injection (motorcycles) |
| DSFI | Danish Stream Fauna Index (Denmark) |
| DSFI | Dual Sequential Fuel Injection (engine) |
| DSFI | Derogatis Sexual Functioning Inventory (research questionnaire) |
| DSFI | Dharma Samudera Fishing Industry (Indonesia) |
| DSFI | Développement Service et Formation Internet (French: Internet Training and Development Service) |
| DSFI | Doug Stewart Flight Instruction, Inc. (South Egremont, MA) |
| DSFI | Detroit Summer Finance Institute (Detroit, MI) |
| DSFI | Divine Science Federation International (St. Louis, MO) |