PIFI
| Acronym | Definition |
|---|---|
| PIFI | Personally Identifiable Financial Information |
| PIFI | Public Interest Fund of Illinois (Champaign, IL) |
| PIFI | Polarization Insensitive Fiber Isolator (optics) |
| PIFI | Pain-Induced Functional Impairment |
| PIFI | Pensions, Insurance and Financial Institutions (Alberta, Canada) |