| Acronym | Definition |
|---|
| OPSI➣Office of Public Sector Information (UK) |
| OPSI➣Operations Strategies for Industry |
| OPSI➣Overwhelming Post-Splenectomy Infection |
| OPSI➣Ohio Patient Safety Institute (Ohio Health Council) |
| OPSI➣Open PC Server Integration |
| OPSI➣Occidental Power Services Inc. (Houston, TX) |
| OPSI➣Office of Personnel Systems Integrity (US DHHS) |