| Abbreviation | Definition |
|---|---|
| OCFP | Oregon-Canadian Forest Products |
| OCR | Off Center Rim |
| OCR | Operation Cost Rate |
| OCS | One Complete Solution |
| OCT | Open Tubular Column |
| OCTG | Oil Country Tubular Goods |
| ODF | Open Drip Proof |
| ODP | Oil Dependent Products |
| ODP | Open Drip Proof |
| O-EA | O-flex Energy Absorbing |
| OEP | Original Engineered Products |
| OFC | Oxygen Free Copper |
| OFCU | ORCA Filter Control Unit |
| OFM | Outdoor Fan Motor |
| OFPANZ | Outdoor Fabric Products Association of New Zealand (Christchurch, New Zealand) |
| OFR | Old Fixed Ring |
| OFS | Over Feed Stop |
| OFT | Odor Fighting Thread |
| OFV | OverFlow Valve |
| OH | Off Hand |