| .its |
Impulse Tracker Sample |
| .iaf |
Outlook Internet Account File |
| .imd |
GIS Image Metadata File |
| .ime |
Windows Input Method Editor File |
| .infopathxml |
Microsoft InfoPath Form |
| .jnt |
Windows Journal File |
| .jse |
JScript Encoded File |
| .jxr |
JPEG XR Image |
| .jtp |
Windows Journal Template |
| .job |
MetaCAM Nest Job File |
| .jcz |
Liquid Motion Animation |
| .jrs |
Reserve Transaction Log File |
| .jtx |
ESE Transaction Log |
| .jet |
JET Database File |
| .jpn |
Windows Japanese Noise-Word List File |
| .khd |
Dynamics AX Kernel Help Data File |
| .khi |
Dynamics AX Kernel Help Index File |
| .kodu |
Kodu Game File |
| .kdmp |
Windows Crash Dump File |
| .kor |
Windows Korean Noise-Words List File |
| .mdb |
Microsoft Access Database |
| .msg |
Outlook Mail Message |
| .msi |
Windows Installer Package |
| .mdf |
SQL Server Database File |