| extension name | file type | Classification |
|---|---|---|
| OEB | Open eBook File | eBook file |
| OEBZIP | Zipped Open eBook File | eBook file |
| OPF | Open Packaging Format File | eBook file |
| ORB | Original eBook Reader File | eBook file |
| extension name | file type | Classification |
|---|---|---|
| OEB | Open eBook File | eBook file |
| OEBZIP | Zipped Open eBook File | eBook file |
| OPF | Open Packaging Format File | eBook file |
| ORB | Original eBook Reader File | eBook file |