| Abbreviation | Definition |
|---|---|
| ODG | Official Disability Guidelines |
| ODP | Operating Department Practitioner |
| ODP | Operational Departmental Practitioners |
| OE | Operating Engineer |
| OE | Owner's Engineer |
| OEX | Overland EXpert |
| OF | Older Fellow |
| OF | Outfielder |
| OFG | Opportunity For Growth |
| OFI | Opportunity For Improvement |
| OG | Old Gangster |
| OG | Old Girl |
| OG | Old Guy |
| OG | Organ Grinder |
| OG | Original Gangsta |
| OG | Original Gangster |
| OHD | Occupational Health Doctor |
| OHN | Occupational Health Nurse |
| OHP | Occupational Health Psychologist |
| OHPA | Occupational Health Physician Assistant |