| iok | Omniscope IOK Data |
| iokit | Dell DPACK Results Data |
| iom | Bosch VisualMotion IO Mapper Data |
| iom | Omniscope IOM Data |
| ion | NewsLeecher Description Data |
| ioplist | Mac OS X IOPLIST Data |
| ios | Apple iOS Related Data |
| iox | Response Channel Manager Template |
| ip | Interactive Physics Data |
| ipalias | Apple iPhoto Alias File |
| ipb | IRAM Plateau de Bure Interferometer Data |
| ipc | IPC-D-356 Data |
| ipc | WinPLOTR Intrinsic Profile Component Data |
| ipdb | IP Address Tracker Database |
| ipds | Intelligent Printer Data Stream |
| ipe | Microth InPad Stroke Set |
| ipf | F-Secure Incremental Policy File |
| ipf | IGOR Pro Procedure File |
| ipf | Microsoft SMS Installer Script |
| ipf | OS/2 Warp Help Data |
| ipf | PCAN-Explorer Panel Data |
| ipfg | iPFG Client Data |
| ipfix | Internet Protocol Flow Information Export Protocol Data |
| ipflib | DWOS Implant Library Data |
| iphoto | Apple iPhoto Photo Library |
| ipi | Microsoft Windows Installer Data |
| ipk | Nintendo DS Packed Image Data |
| ipk | Shana Informed Filler Package |
| ipkg | Indicore SDK Package |
| ipl | CorelDraw Pantone Spot Reference Palette |
