| Term | Full Form | Category |
|---|---|---|
| NPNI | Natural Parents Network of Ireland | Others |
| NPNI | No Payments, No Interest | Others |
| NPNI | No Press, No Information | Others |
| NPNI | No Publicar No Informar | Others |
| NPNI | Noel Park Neighbourhood Initiative | Others |
| NPNI | Non Part-Numbered Item | Others |
| NPNI | Norman Prince Neurosciences Institute | Others |