| Rank | Abbreviation | Meaning |
|---|
| ***** | NPDI | Number Portability Dip Indicator
| |
| ***** | NPDI | Number Portability Direction Indicator
| |
| *** | NPDI | New Product Development Initiative
| |
| *** | NPDI | New Product Development and Introduction
| |
| ** | NPDI | No Payment, Deferred Interest
| |
| * | NPDI | Non-Proliferation and Disarmament Initiative
| |
| * | NPDI | Non-Performance of Duty Because Imprisoned
| |
| * | NPDI | Net Private Domestic Investment
| |
| * | NPDI | Navy Product Data Initiative
| |
| * | NPDI | National Pacific Diabetes Initiative
| |
| * | NPDI | Network Protocol Data Intelligence
| |
| * | NPDI | New Product Design and Introduction
| |
| * | NPDI | Navy Periodontal Disease Index
| |
| * | NPDI | New Product Design and Initiation
| |
| * | NPDI | New Product Develpment Introduction
| |
| * | NPDI | Norfolk Power Distribution, Inc.
| |
| * | NPDI | North Product Design Inc
| |