| Term | Full Form | Category |
|---|---|---|
| PIOA | Pacific Islands Orthopaedic Association | Others |
| PIOA | Persistent Infant Onset Atopy | Others |
| PIOA | Planetarium i Obserwatorium Astronomicznego | Others |
| PIOA | Probabilistic I O Automata | Others |
| PIOA | Probabilistic Input Ouptut Automata | Others |
| PIOA | Probabilistic Input Output Automata | Others |
| PIOA | Professional Investigators Organization of Arizona | Others |
| PIOA | Prostate Institute Of America | Others |