| img | Magellan eXplorist Map Image |
| img3 | Apple iPhone IMG3 Data |
| img4 | Apple iPhone IMG4 Data |
| imh | IncrediMail Contacts Export Data |
| imi | Magellan eXplorist Map Image |
| imiss | PLINK Individual-based Missing Data Report |
| imk | IncrediMail License Key |
| imn | IncrediMail Notifier |
| imotion | iClone Motion Capture Data |
| imovielibrary | iMovie Library Data |
| impx | Bentley Map Import XML Data |
| imr | Inertial Explorer IMU Data |
| imsp | Survey Designer Survey Data |
| imu | Inertial Explorer Waypoint IMU Raw Data |
| imw | IncrediMail Sound File |
| in2d | Netgen 2D Geometry Data |
| in4 | InfoBlaster IN4 Data |
| in7 | OxMetrics Human-readable Data |
| ina | MS-DOS Data |
| inb | Delft3D Initial Bed Composition Data |
| inc | POV-Ray Include File |
| incl | BBEdit Markup Include |
| ind | LaTeX Processed Index Data |
| ind | Maple Repository Index File |
| ind | SQL Script Indexes |
| ind | TINA Library Index |
| index | DICT Index File |
| index | MySQL Binlog Index File |
| indk | Adobe InDesign Keyboard Shortcut Set |
| inds | Adobe InDesign Snippet |
| indx | CALDB Index |
| inetloc | Mac OS X Finder Internet Location |
| inf | PTC Creo Information Data |
| info | Spider File Storage Index |
| inf_loc | Windows Driver Information Cache File |