| Abbreviation | Definition |
|---|---|
| ORCA | Outdoor Recreation Company of America |
| ORG | Oz Research Group |
| ORH | Orlando Rosen Centre Hotel |
| ORI | Office Resources Inc |
| ORI | Office Resources, Incorporated |
| ORI | On-Ramp Indiana |
| ORI | On-Ramp Indiana, Inc. |
| ORI | Oregon Research Institute |
| ORJ | Orjin Solar Teknoloji, Ltd. ( Turkey) |
| ORJ | Orjin Solar Teknoloji, LTD. (Turkey) |
| ORK | Osaka Rasenkan Kogyo Company, Ltd. |
| ORL | Obscure Research Labs |
| ORL | Olivetti Research Laboratory |
| ORL | Outram Research Ltd |
| ORMC | Oak Ridges Medical Centre |
| ORPC | Ocean Renewable Power Company |
| ORPC | Oman Refineries and Petrochemicals Company |
| ORPC | Ottawa River Power Corporation |
| ORS | Office Research Service |
| ORS | Orlando Riva Sound |