OOSI
| 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 |