| 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) |