IFSI
| Acronym | Definition |
|---|---|
| IFSI | Institut de Formation en Soins Infirmiers (French: Institute of Nursing Training) |
| IFSI | Illinois Fire Service Institute (Champaign, IL) |
| IFSI | Istituto di Fisica dello Spazio Interplanetario (Italy) |
| IFSI | Intercultural Family Services Inc. (Philadelphia, PA) |
| IFSI | Illinois Foundation Seeds, Inc. (Tolono, IL) |
| IFSI | International Financial Services Institute (est. 2003; National College of Ireland) |
| IFSI | Intelligence Fusion System Integrators |