| Term | Full Form | Category |
|---|---|---|
| OPSI | Observatory of Public Sector Innovation | Others |
| OPSI | Office for Professional Standards and Integrity | Others |
| OPSI | Office of Public Sector Information | Others |
| OPSI | Ohio Patient Safety Institute | Others |
| OPSI | Open PC Server Integration | Others |
| OPSI | Open Policy Service Interface | Others |
| OPSI | Opening Purchases Sales Inventory | Others |
| OPSI | Organization of PJM States Inc | Others |
| OPSI | Overwhelming Post Splenectomy Infection | Others |
| OPSI | Overwhelming Post-Splenectomy Infection | Others |