NTPI
| 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) |