| Acronym | Definition |
|---|
| IFSU➣Ifugao State University (Ifugao, Philippines) |
| IFSU➣Internationaler Fachverband Show und Unterhaltungskunst eV (German: International Association of Show and Entertainment Arts) |
| IFSU➣intelligent Fiber Service Unit (Lancast) |
| IFSU➣International Foundation for Spiritual Unfoldment |
| IFSU➣Immigrants from the Former Soviet Union (population) |