PTRI
| Acronym | Definition |
|---|---|
| PTRI | Philippine Textile Research Institute |
| PTRI | PACE Turfgrass Research Institute (PACE Turf; San Diego, CA) |
| PTRI | Perutusan Tetap Republik Indonesia (Indonesian: Permanent Mission of the Republic of Indonesia) |
| PTRI | Passive Threat Resolution Interface (security software) |