NPSO
| Acronym | Definition |
|---|---|
| NPSO | Native Plant Society of Oregon |
| NPSO | Nassau Pops Symphony Orchestra (New York) |
| NPSO | National Programme Support Office (Pakistan) |
| NPSO | North Penn Symphony Orchestra (Lansdale, PA) |
| NPSO | Non-Product Specific Offer |
| NPSO | Non-Parametric Second-Order |
| NPSO | National Pink Space Operations (gaming) |