PJN
| Acronym | Definition |
|---|---|
| PJN | Poder Judicial de La Nación (Argentina, national judicial power) |
| PJN | Peace and Justice Network (Triad, NC) |
| PJN | Partido Justicia Nacional (Spanish: National Justice Party) |
| PJN | Polish Jazz Network (est. 2000) |
| PJN | Patrick J. Noonan Consulting, Inc. (Colorado and North Carolina) |
| PJN | Pancreatic Juice Neopterin |