| Extension | File Description |
| .IFH | Uncommon Files |
| .IFI | Uncommon Files |
| .IFILE | Uncommon Files |
| .IFJ | Uncommon Files |
| .IFK | Uncommon Files |
| .IFL | Misc Files |
| .IFM | Uncommon Files |
| .IFN | Uncommon Files |
| .IFO | Video Files |
| .IFP | Game Files |
| .IFQ | Uncommon Files |
| .IFR | Uncommon Files |
| .IFS | Uncommon Files |
| .IFT | Uncommon Files |
| .IFU | Uncommon Files |
| .IFV | Uncommon Files |
| .IFW | Uncommon Files |
| .IFX | Uncommon Files |
| .IFY | Uncommon Files |
| .IFZ | Uncommon Files |
| .IG | Uncommon Files |
| .IG0 | Uncommon Files |
| .IG1 | Uncommon Files |
| .IG2 | Uncommon Files |
| .IG3 | Uncommon Files |
| .IG4 | Uncommon Files |
| .IG5 | Uncommon Files |
| .IG6 | Uncommon Files |
| .IG7 | Uncommon Files |
| .IG8 | Uncommon Files |
| .IG9 | Uncommon Files |
| .IGA | Uncommon Files |
| .IGB | Uncommon Files |
| .IGC | Data Files |
| .IGD | Uncommon Files |
| .IGE | Uncommon Files |
| .IGES | 3D Image Files |
| .IGF | Uncommon Files |
| .IGG | Uncommon Files |
| .IGH | Uncommon Files |
| .IGI | Uncommon Files |
| .IGJ | Uncommon Files |
| .IGK | Uncommon Files |
| .IGL | Uncommon Files |
| .IGM | Uncommon Files |
| .IGN | Uncommon Files |
| .IGNORE | Uncommon Files |
| .IGO | Uncommon Files |
| .IGP | Audio Files |
| .IGQ | Uncommon Files |
| .IGR | Settings Files |
| .IGS | CAD Files |
| .IGT | Uncommon Files |
| .IGU | Uncommon Files |
| .IGV | Uncommon Files |
| .IGW | Uncommon Files |
| .IGX | Vector Image Files |
| .IGY | Uncommon Files |
| .IGZ | Uncommon Files |
| .IH0 | Uncommon Files |
| .IH1 | Uncommon Files |
| .IH2 | Uncommon Files |
| .IH3 | Uncommon Files |
| .IH4 | Uncommon Files |
| .IH5 | Uncommon Files |
| .IH6 | Uncommon Files |
| .IH7 | Uncommon Files |
| .IH8 | Uncommon Files |
| .IH9 | Uncommon Files |
| .IHA | Uncommon Files |
| .IHB | Uncommon Files |
| .IHC | Uncommon Files |
| .IHD | Uncommon Files |
| .IHE | Uncommon Files |
| .IHF | Uncommon Files |
| Extension | File Description |
| .IHG | Uncommon Files |
| .IHH | Uncommon Files |
| .IHI | Uncommon Files |
| .IHJ | Uncommon Files |
| .IHK | Uncommon Files |
| .IHL | Uncommon Files |
| .IHM | Uncommon Files |
| .IHN | Uncommon Files |
| .IHO | Uncommon Files |
| .IHP | Uncommon Files |
| .IHQ | Uncommon Files |
| .IHR | Uncommon Files |
| .IHS | Uncommon Files |
| .IHT | Uncommon Files |
| .IHTML | Uncommon Files |
| .IHU | Uncommon Files |
| .IHV | Uncommon Files |
| .IHW | Uncommon Files |
| .IHX | Uncommon Files |
| .IHY | Uncommon Files |
| .IHZ | Uncommon Files |
| .II | Data Files |
| .II0 | Uncommon Files |
| .II1 | Uncommon Files |
| .II2 | Uncommon Files |
| .II3 | Uncommon Files |
| .II4 | Uncommon Files |
| .II5 | Uncommon Files |
| .II6 | Uncommon Files |
| .II7 | Uncommon Files |
| .II8 | Uncommon Files |
| .II9 | Uncommon Files |
| .IIA | Uncommon Files |
| .IIB | Uncommon Files |
| .IIC | Uncommon Files |
| .IID | Uncommon Files |
| .IIE | Uncommon Files |
| .IIF | Data Files |
| .IIF1 | Data Files |
| .IIG | Uncommon Files |
| .IIGS | Uncommon Files |
| .IIH | Uncommon Files |
| .III | Uncommon Files |
| .IIJ | Uncommon Files |
| .IIK | Uncommon Files |
| .IIL | Text Files |
| .IIM | Executable Files |
| .IIMG | Uncommon Files |
| .IIN | Uncommon Files |
| .IIO | Uncommon Files |
| .IIP | Uncommon Files |
| .IIQ | Uncommon Files |
| .IIR | Uncommon Files |
| .IIS | Uncommon Files |
| .IIT | Settings Files |
| .IIU | Uncommon Files |
| .IIV | Uncommon Files |
| .IIW | Uncommon Files |
| .IIX | Misc Files |
| .IIY | Uncommon Files |
| .IIZ | Uncommon Files |
| .IJ0 | Uncommon Files |
| .IJ1 | Uncommon Files |
| .IJ2 | Uncommon Files |
| .IJ3 | Uncommon Files |
| .IJ4 | Uncommon Files |
| .IJ5 | Uncommon Files |
| .IJ6 | Uncommon Files |
| .IJ7 | Uncommon Files |
| .IJ8 | Uncommon Files |
| .IJ9 | Uncommon Files |
| .IJA | Uncommon Files |
| .IJB | Uncommon Files |
| .IJC | Uncommon Files |
| .IJD | Uncommon Files |
