| Abbreviation | Definition |
|---|---|
| PDDC | Product Design and Development Corp |
| PDE | Pacific Design Engineering |
| PDFC | Pinnacle Direct Funding Corporation |
| PDFI | Pailig Development Foundation Inc |
| PDFI | Paranaque Development Foundation Inc |
| PDFI | PMAAA Development Foundation Inc |
| PDFI | Precision Digital Forensics Inc |
| PDFL | Process Design and Fabrications Ltd |
| PDG | Product Development Group |
| PDI | Paramount Designs Inc |
| PDI | Performance Developement, Inc. |
| PDI | Performance Development Inc |
| PDI | Performance Development, Inc. |
| PDI | Performance Development, Incorporated |
| PDI | Performance Diesel Inc |
| PDI | Pile Dynamics Inc |
| PDI | Political Data Inc |
| PDI | Power Distribution Inc |
| PDI | Precision Devices Inc |
| PDI | Precision Diagnostic Instruments |