| 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) |