| Abbreviation | Definition |
|---|---|
| ORDB | Object Relational Database |
| ORDB | Operator Reference Data Base |
| ORDBMS | Object Relational Database Management System |
| ORDS | Online Research Database Service |
| ORM | Object Recognition Module |
| ORM | Object Relational Mapping |
| ORT | Online Review Tool |
| OSOD | Ophthalmic Surgical Outcome Database |
| OSP | Oracle Stored Procedure |
| OSTD | Open Source Translation Database |
| OSVDB | Open Source Vulnerability Database |
| OT | Object Type |
| OTN | Oracle Technology Network |
| OTQ | One Tick Query, Computer Databases |
| OTR | One Touch Record |
| OUG | Oracle Users Group |
| OUI | Oracle Universal Installer |
| OVDC | Oracle Virtual Desktop Clients |
| OVID | Offshore Vessel Inspection Database |
| OWA | Oracle Web Application |