| Acronym | Definition |
|---|
| OASYS➣Open Architecture System |
| OASYS➣Open Architecture Synthesis Studio |
| OASYS➣Open Architecture Synthesis Studio (Korg) |
| OASYS➣Office Automation System |
| OASYS➣Online Automated System |
| OASYS➣Orbit Analysis System |
| OASYS➣Obstacle Avoidance System |
| OASYS➣Open Architecture System (advanced aviation system development) |
| OASYS➣Ontario Assessment System (Government of Ontario, Canada) |
| OASYS➣Operability Assessment System |
| OASYS➣Operator Assist System |