| filename extensions | art-335 |
| obk | |
| TechTarget file types | art-336 | OBK-Genie-Outlook-backup-file |
| TechTarget file types | art-336 | OBK-OrCAD-Capture-Design-Library |
| TechTarget file types | art-336 | OBK-Oxygen-Phone-Manager-phone-book |
| TechTarget file types | art-336 | OBK-UbiSoft-ChessMaster-opening-book-file |
| English | eng-000 | Genie Outlook backup file |
| English | eng-000 | OrCAD Capture Design / Library |
| English | eng-000 | Oxygen Phone Manager phone book |
| English | eng-000 | UbiSoft ChessMaster opening book file |