| .bar |
Age of Empires 3 Data File |
| .bks |
NTBackup Settings File |
| .bmk |
BillMinder Backup File |
| .browser |
ASP.NET Browser Definition File |
| .bsc |
Visual Studio Source Browser Information File |
| .brg |
Age of Mythology Model File |
| .blf |
Binary logging format file, Common Log File System |
| .blogthis |
Windows Live Writer Data File |
| .bps |
BPS Virus File |
| .bk1 |
Autodesk Backup File |
| .bud |
Binary Printer Description File |
| .bk2 |
Windows Indexing Service Data File |
| .ba_ |
Renamed BAT File |
| .cab |
Windows Cabinet File |
| .com |
DOS Command File |
| .cpl |
Windows Control Panel Item |
| .cs |
C# Source Code File |
| .chm |
Compiled HTML Help File |
| .cmd |
Windows Command File |
| .crd |
Guitar Tabs |
| .cpr |
Cubase Project |
| .csproj |
Visual Studio C# Project |
| .contact |
Windows Contact File |
| .c2r |
Windows Media Center Click-To-Record File |