| Abbreviation | Definition |
|---|---|
| OOP | Object Ordering Program |
| OOP | Object Oriented Project |
| OOP | Out Of Plant |
| OOP | Out Of Pocket |
| OOP | Out Of Pouch |
| OOP | Out-Of-Pocket |
| OOPS | Other Organizations People Similar |
| OOPS | Our Overnight Planning System |
| OOR | Operational Readiness Review |
| OOS | Our Own Standards |
| OOT | Out Of Time |
| OOW | Out Of Warranty |
| OP | On Plan |
| OP | Outside Partner |
| OP/CO | Operating Company |
| OPA | Outcome, Purpose, and Action |
| OPAL | Outstanding Projects And Leaders |
| OPAS | Organizational Prior Approval System |
| OPB | OPerating Budget |
| OPC | Open Plant Cleaning |