| NAPP | National Aerial Photography Program 
| Others |
| NAPP | National Alliance of Professional Painters
| Others |
| NAPP | National Association for Patient Participation
| Others |
| NAPP | National Association of Patent Practitioners
| Others |
| NAPP | National Association of Photoshop Professionals
| Others |
| NAPP | Natural Areas Preservation Program
| Others |
| NAPP | Naval Aviation Preparatory Program
| Others |
| NAPP | Nerve Agent Pyridostigmine Pretreatment
| Others |
| NAPP | New Assistant Professor Program
| Others |
| NAPP | North Atlantic Population Project
| Others |
| NAPP | Not A Puzzle Piece
| Others |