| Abbreviation | Definition |
|---|---|
| PDA | Philippine Dental Association |
| PDAI | Primary Dealers Association of India |
| PDCA | Painting and Decorating Contractors of America |
| PDCA | Pile Driving Contractors Association |
| PDCA | Professional Driver Carrier Association |
| PDEN | Phoenix Downtown Express Network |
| PDI | Plumbing and Drainage Institute |
| PDMA | Product Development Management Association |
| PDN | Project Developers Network |
| PDSA | Post Doctoral Scholars Association |
| PDSA | Professional Diving Schools Association |
| PEA | Philippine Economy Army |
| PEA | Procurements Executive Association |
| PEA | Procurement's Executive Association |
| PEDA | Pan European Dealers Association |
| PEI | Porcelain Enamel Institute |
| PEIOTRB | Prince Edward Island Occupational Therapy Regulatory Board |
| PEMA | Public Equipment Managers' Association |
| PEMDA | Power Electronics and Magnetics Designers Association |
| PEO | Professional Employee Organization |