| Abbreviation | Definition |
|---|---|
| OASIS | Okagor Airport Security International Services |
| OASIS | Online Auction Service and Internet Specialists |
| OASIS | Outcome and Assessment Information Set |
| OAT | Overseas Adventure Travel |
| OAV | Orthopaedic Associates of Virginia |
| OAV | Outdoor Adventure Videos |
| OAW | Oppenheimer And Walsh |
| OBA | O'Brien & Associates |
| OBA | Oil Buying Alliance |
| OBA | Oregon Business Association |
| OBB | Ontario Canada Bed and Breakfast Inn |
| OBC | Oconee Brewing Company |
| OBC | Oden Bunka Center |
| OBC | Ojai Beverage Company |
| OBC | Orono Brewing Company |
| OBCA | Ontario Business Corporation Act |
| OBCI | Ocean Bio-Chem, Inc. |
| OBDC | Oakland Business Development Center |
| OBDC | Oakland Business Development Corporation |
| OBDC | Ohio Business Development Coalition |