PNSN
| Acronym | Definition |
|---|---|
| PNSN | Pacific Northwest Seismic Network (University of Washington) |
| PNSN | Pacific Northwest Seismograph Network (see also Pacific Northwest Earthquake Information, PNEI) |
| PNSN | Parque Nacional Sierra Nevada (Spanish: Sierra Nevada National Park; Venezuela) |
| PNSN | Seaman, Personnelman Striker (Naval Rating) |