| Abbreviation | Definition |
|---|---|
| OHC | Overhead Cabinet |
| OHCs | Overhead Cabinets |
| OHG | OverHead Guard |
| OHMD | Optical Head Mounted Display |
| OHUI | Brand name |
| OHV | OverHead Valve |
| OIK | Open It Kit |
| OINZ | Only in New Zealand |
| OJK | Oil Jacketed Kettle |
| OJK | Old Joe Krantz |
| OLI | On Line International |
| OLP | Officially Licensed Product |
| OLP | Officially Licensed Products |
| OLP | Outdoor Leisure Products |
| OLTC | On-Line Tap Changer |
| OMB | Offset Multi Bracket |
| OMF | One Million Forms |
| OML | Outside Mold Line |
| OMP | Orphan Medicinal Products |
| OMPS | Oh my Print Solutions |