| .ion |
File Description File |
| .icl |
Windows Icon Library File |
| .iconpackage |
IconPackager Theme File |
| .itemdata-ms |
Windows 8 Start Screen Item Data File |
| .ius |
InfoTMIC Firmware Update File |
| .img3 |
iPhone IMG3 File |
| .inf_loc |
Windows Driver Information Cache File |
| .idi |
EVA Controller Event Log |
| .its |
Impulse Tracker Sample |
| .iptheme |
IconPackager Raw Theme File |
| .ipod |
Rockbox Firmware File |
| .ime |
Windows Input Method Editor File |
| .ifw |
INTUS Firmware File |
| .internetconnect |
Apple Internet Connect Document |
| .im4p |
IMG4 Payload File |
| .ioplist |
Mac OS X IOPLIST File |
| .job |
MetaCAM Nest Job File |
| .jpn |
Windows Japanese Noise-Word List File |
| .key |
Software License Key File, Apple's Keynote software file, keyboard definition file |
| .kext |
Mac OS X Kernel Extension |
| .kbd |
3ds Max Keyboard Shortcuts File |
| .ko |
Linux Kernel Module File |
| .ks |
Kickstart File |
| .kor |
Windows Korean Noise-Words List File |