| Acronym | Definition |
|---|
| FIEI➣Facultad de Ingeniería Electrónica e Informática (Spanish: School of Electrical and Computer Engineering; Peru) |
| FIEI➣Federazione Italiana Emigrazione Immigrazione (Italian: Italian Emigration-Immigration Federation) |
| FIEI➣Female Intervention Efficacy Index |
| FIEI➣Fellow of the Institution of Engineers of Ireland |