| Abbreviation | Definition |
|---|---|
| OIU | Operator Interface Unit |
| OJB | ObJectRelational Bridge |
| OJE | Open Java Extensions |
| OKB | Online Knowledge Base |
| OKI | Open Knowledge Initiative |
| OKY | CDAPI Specification for Key_Component |
| OL | Ordered List |
| OLA | Open Lab Assignments |
| OLA | Operational Level Agreement |
| OLAP | On Line Analytical Processing |
| OLE | Object Listed and Executed |
| OLG | Online Learner's Guide |
| OLR | On-Line Registry |
| OLS | On- Line Solution |
| OLS | On-Line Solution |
| OLTEP | On- Line Test Executive Program |
| OLTP | On Line Transaction Processing |
| OM | Object Marker |
| OM | Object Model |
| OM | Out of Memory |