PNNA
| Acronym | Definition |
|---|---|
| PNNA | Poly (N-Naphtylaniline) |
| PNNA | Pacific Northwest Newspaper Association |
| PNNA | Pacific Northwest Numismatic Association |
| PNNA | Parque Nacional Natural Amacayacu |
| PNNA | Pairwise Nearest Neighbor Algorithm |
| PNNA | Plan Nacional de Navegación Aérea (Peru) |