| .ati |
Office Accounting Updated Company File |
| .accdw |
Microsoft Access Database Link File |
| .adml |
Group Policy Language-Specific Administrative Template |
| .acw |
Windows Accessibility Wizard File |
| .automaticdestinations-ms |
Windows Jump List File |
| .accdu |
Access Add-in File |
| .adn |
Access Blank Project Template |
| .appxsym |
Windows 8 App Package Symbols File |
| .bat |
DOS Batch File |
| .blg |
Windows Binary Performance Log File |
| .bgl |
Babylon Glossary File |
| .bcd |
Windows Boot Configuration Data File |
| .bdb |
Microsoft Works Database Backup File |
| .box |
E-mail Mailbox |
| .bkf |
Windows Backup Utility File |
| .bmc |
Bitmap Cache File |
| .bfc |
Windows Briefcase File |
| .bcm |
Business Contact Manager File |
| .bcmx |
Business Contact Manager Customization |
| .btm |
BizTalk Map File |
| .bgi |
BgInfo Configuration File |
| .bdr |
Publisher Borders File |
| .bad |
Exchange Badmail File |
| .bdp |
Exchange Diagnostic Message |