| Abbreviation | Definition |
|---|---|
| OBG | O'Brien & Gere |
| OBG | The O'Brien and Gere Companies |
| OBG | The O'Brien Group |
| OBH | Ocean Bottom Hydrophone Instruments |
| OBH | On Beacon Hill |
| OBI | Oilfield Bearing Industries |
| OBI | Opportunity Builders Inc |
| OBI | OsteoBiologics, Incorporated |
| OBK | Ontario Beer Kegs |
| OBK | Out Back Kayak |
| OBM | Ocean Blue Management |
| OBM | Our Business Machines, Inc. |
| OBN | Oil Buying Network |
| OBP | One Business Place |
| OBP | Osaka Business Park |
| OBP | outbackpartsonline.com |
| OBS | Ocala Breeders' Sales Company |
| OBS | Olympus BioSystems |
| OBS | Open Book Systems |
| OBSL | Oglobe Business Solutions Ltd |