| Acronym | Definition |
|---|
| PTFI➣PT Freeport Indonesia (mining company) |
| PTFI➣Philippine Tarsier Foundation, Inc. (est. 1997; Philippines) |
| PTFI➣Pilot Trial for Ignition |
| PTFI➣Presbyterian Theological Faculty Ireland |
| PTFI➣Phil the Funky Instrumentalist (musician) |