| Abbreviation | Definition |
|---|---|
| OSM | Object Space Man |
| OSM | Object-Oriented Systems Modeling |
| OSM | On Screen Menu |
| OSM | Operation Status Monitoring |
| OSMA | On-Site Maintenance Agreement |
| OSNS | Open Systems Network Support |
| OSR | Operating System Resource |
| OSS | Open System Support |
| OSS | Operation and Support System |
| OSSA | On- Site Service Agreement |
| OSSI | Operating Systems Support and Integration |
| OSTC | Open System Testing Consortium |
| OT | Operator Terminal |
| OTE | Open Transaction Environment |
| OTG | Oracle Trading Guild |
| OTJT | On the Job Training |
| OTL | Operator Type Library |
| OTPROM | One Time Programmable Read Only Memory |
| OTSS | Online Technical Support Service |
| OUG | Online User Guide |