| .h1q |
Microsoft Help Merged Query Index File |
| .hmt |
HighMAT File |
| .hsh |
Windows Catalog Search Index File |
| .id2 |
Windows Live Messenger Emoticon File |
| .ins |
LaTeX Installer Script |
| .ismv |
IIS Smooth Streaming Video File |
| .ism |
IIS Smooth Streaming Manifest File |
| .ipf |
Interchangeable Preservation File |
| .idc |
Internet Database Connector File |
| .idb |
Visual Studio Intermediate Debug File |
| .icd |
SafeDisc Encrypted Program |
| .icl |
Windows Icon Library File |
| .inl |
C++ Inline File |
| .idl |
Interface Definition Language File |
| .i |
Visual Studio Intermediate File |
| .ilk |
Incremental Linking File |
| .ipch |
Intellisense Precompiled Header File |
| .idt |
Windows Installer Database Text Archive File |
| .itemdata-ms |
Windows 8 Start Screen Item Data File |
| .isma |
IIS Smooth Streaming Audio File |
| .ismc |
Smooth Streaming Client Manifest File |
| .inf_loc |
Windows Driver Information Cache File |
| .isp |
IIS Internet Service Provider Settings |
| .iqy |
Internet Query |