| Acronym | Definition |
|---|
| IFSF | India Food Service Forum |
| IFSF | International Feng Shui Federation (Hong Kong) |
| IFSF | International Federation of Snape Fans |
| IFSF | Index of Female Sexual Function (urology) |
| IFSF | International Free Software Forum |
| IFSF | Institut de Formation Slow Food (international movement) |
| IFSF | Irradiated Fuel Storage Facility |
| IFSF | Islamic Foundation of South Florida (Sunrise, FL) |
| IFSF | International Forecourts Standards Forum (oil industry group formed in 1993) |
| IFSF | Infinity Speculative Fund, Inc. |
| IFSF | InterFaith Settlement Foundation (UK) |
| IFSF | Institut für Software-Forschung (German: Institute for Software Research) |