| Acronym | Definition |
|---|
| NAPP | National Association of Photoshop Professionals |
| NAPP | National Association of Patent Practitioners (Williamsburg, VA) |
| NAPP | National Aerial Photography Program (USGS) |
| NAPP | National Association for Patient Participation (UK) |
| NAPP | Neighborhood Adult Participation Project (Office of Economic Opportunity; California) |
| NAPP | Sodium Pyrophosphate |
| NAPP | National Association of Philanthropic Planners (now International Association of Advisors in Philanthropy) |
| NAPP | Naval Aviation Preparatory Program (US Navy) |
| NAPP | Nerve Agent Pyridostigmine Pretreatment |
| NAPP | National Association of Peer Programs |
| NAPP | National Association of Priest Pilots |
| NAPP | Non-Agricultural Pesticides Panel (United Kingdom) |
| NAPP | Negative Acknowledgement with Periodic Polling (networking protocol) |
| NAPP | National Association of Patient Practitioners |