HPSO
| Acronym | Definition |
|---|---|
| HPSO | Healthcare Providers Service Organization |
| HPSO | Hardy Plant Society of Oregon |
| HPSO | Hybrid Particle Swarm Optimization (algorithm) |
| HPSO | Hewlett-Packard Symphony Orchestra |
| HPSO | Health Program Support Office (World Bank; Bangladesh) |
| HPSO | Honors Program Student Organization (St. Catherine University and University of North Dakota) |