| QuickTax Backup Format | |
| Intuit Canada | |
| Ads |
QBK file is a backup file for Q08 and Q09 files. QBK file contains information regarding tax returns. QBK, Q08, and Q09 files are used by QuickTax software (and since 2008, by TurboTax), a program used for tax settlement procedures compatible with Canadian tax laws.
QBK, Q08, and Q09 hold identical contents and differ only in the file extension type. QBK backup copy file is generated immediately after the main file is saved. In order to recover the main file form backup copy, user needs only to change QBK file’s extension into Q08 or Q09.
Windows
Mac OS
| .ab | Google Android Debug Bridge Backup Format |
| .aba | Palm Address Book Archive Format |
| .abbu | Apple Address Book Archive Format |
| .abf | Adobe Binary Screen Font Format |
| .abk | Ability Write Backup Format |
| .acp | Alfresco Exported Repository Format |
| .adi | Active@ Disk Image Format |
| .aea | Ae Timer Alarm Document Format |