| Acronym | Definition |
|---|
| OOSI➣Orange Osceola Safety Institute (Orlando, FL) |
| OOSI➣Ohio Outdoor Sculpture Inventory (The Sculpture Center) |
| OOSI➣Open Ocean Systems, Inc. (Canada) |
| OOSI➣Oklahoma Office Systems, Inc. (Office Equipment Dealer) |
| OOSI➣Out-of-Service Indication |