| Acronym | Definition |
|---|
| PIRL | Ponies in Real Life (video) |
| PIRL | Pattern Information Retrieval Language |
| PIRL | Private Investigators' Resources and Locator (website) |
| PIRL | Prioritized Integrated Requirements List |
| PIRL | Planetary Image Research Laboratory (University of Arizona; Tucson, AZ) |
| PIRL | Program for International Research Linkages (various locations) |
| PIRL | Perceptual Interfaces and Reality Laboratory (University of Maryland) |
| PIRL | POSTECH (Pohang University of Science and Technology) Information Research Laboratory (South Korea) |
| PIRL | Psychology Internet Resource List |