| Abbreviation | Definition |
|---|---|
| OCDA | Oracle Certified Database Associate |
| OCFS | Oracle Cluster File System |
| OCI | Oracle Call Interface |
| OCID | Online Chemical Inventory Database |
| OCID | Oregon Coalition of Interdisciplinary Databases |
| OCT | Oracle Command Type |
| ODA | Oracle Database Appliance |
| ODAPI | Open database Api |
| ODAT | Opal Database Administration Tool |
| ODAT | Oracle Database Attacking Tool |
| ODAT | Oracle Database Attacking Tools |
| ODB | Object DataBase |
| ODB | Observational Data Base |
| ODB | Open Database But |
| ODBC | Open Data Base Connectivity |
| ODBMS | Object-oriented Database Management System |
| ODBS | On-line DataBase Solution |
| ODBS | Oracle Database Backup Service |
| ODCA | Open Data Center Alliance |
| ODCD | Orthopaedic Device Company Database |