| Acronym | Definition |
|---|
| NTPI➣National Terrorism Preparedness Institute |
| NTPI➣National Tax Practice Institute |
| NTPI➣Norway-Tanzania Partnership Initiative |
| NTPI➣Naval Technical Proficiency Inspection |
| NTPI➣Nuclear Test Proficiency Inspection |
| NTPI➣Non-Transferrin-Plasma Iron (hematology) |