PNSB
| Acronym | Definition |
|---|---|
| PNSB | Purple Non-Sulfur Bacteria |
| PNSB | Puncak Niaga Sdn. Bhd. (water industry; Malaysia) |
| PNSB | Permodalan Negeri Selangor Berhad (Malaysia) |
| PNSB | Palau National Scholarship Board |
| PNSB | Police Narcotics Suppression Bureau (Thailand) |
| PNSB | Progetto Nazionale Simon Bolivar (Italian: National Simon Bolivar Project) |