| Term | Full Form | Category |
|---|---|---|
| NGPI | Nashville Ghost and Paranormal Investigators | Others |
| NGPI | National Group Psychotherapy Institute | Others |
| NGPI | NDC Guthrie Plantations Inc | Others |
| NGPI | Next Galaxy Poetry Initiative | Others |
| NGPI | Next Generation Product Identification | Others |
| NGPI | Next Generation Product Identifier | Others |