| Acronym | Definition |
|---|
| FISI➣Facultad de Ingeniería de Sistemas e Informática (Spanish: Faculty of Engineering and Computer Systems; various locations) |
| FISI➣Federazione Italiana Sport Invernali (Italian Federation for Winter Sports) |
| FISI➣Fachinformatiker für Systemintegration (German: degree in information technology) |
| FISI➣Fulbright International Summer Institute (academic and cultural program) |
| FISI➣Fecal Incontinence Severity Index |
| FISI➣Financial Institution Services, Inc. (now Progeny Marketing Innovations) |