| File Extension: | BK9 |
| File Type Description: | Corel WordPerfect Document Backup File |
| File Type Developer: | Corel |
| Primary Associated Software: | Corel WordPerfect |
| Primary Software Developer: | Corel |
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Corel WordPerfect Document Backup File files are the most popular type of files to carry the BK9 file extension, originally developed by Corel for Corel WordPerfect. Commonly, Corel WordPerfect Document Backup File files are found on user computers from Japan, and on PCs running the Windows 10 operating system. Generally, we have found that most of these people are Google Chrome users.
 | Corel WordPerfect by Corel |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .BK3 | Corel | Backup Files | Corel WordPerfect Document Backup File |
| .BK6 | Corel | Backup Files | Corel WordPerfect Document Backup File |
| .BK8 | Corel | Backup Files | Corel WordPerfect Document Backup File |
| .BK4 | Corel | Backup Files | Corel WordPerfect Document Backup File |
| .BK! | Corel | Backup Files | Corel WordPerfect Document Backup File |
| .ISO | Igor Pavlov | Disk Image Files | Disc Image File |
| .ZLJ | Check Point Software Technologies Ltd. | Data Files | ZoneAlarm Mailsafe Renamed Data |
| .ARC | Symantec Corporation | Backup Files | Norton Backup Archive |
| .ZPN | Check Point Software Technologies Ltd. | Data Files | ZoneAlarm Mailsafe Renamed Data |
| .S03 | Corel Corporation | Data Files | Corel WordPerfect Distribution File |
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