PIFS
| Acronym | Definition |
|---|---|
| PIFS | Pacific Islands Forum Secretariat |
| PIFS | Point Inter Frame Space |
| PIFS | Philippine International Furniture Show |
| PIFS | Post-Infectious Fatigue Syndrome |
| PIFS | Program on International Financial Systems (Harvard Law School; Cambridge, MA) |
| PIFS | Priority Interframe Spacing |
| PIFS | Prolonged Intermittent Foot Shock (clinical psychological research) |