| File Extension: | HO |
| File Type Description: | Knowledge Explorer Knowledge Representation Hierarchy Outline |
| File Type Developer: | Open Source |
| Primary Associated Software: | my Knowledge Explorer |
| Primary Software Developer: | Open Source |
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Knowledge Explorer Knowledge Representation Hierarchy Outline files are the most popular type of files to carry the HO file extension, originally developed by Open Source for my Knowledge Explorer. Annoymous user data statistics infer that HO files are most popular in United States and with those using Windows 10 devices. Google Chrome is their primary internet browser for the bulk of these users.
 | my Knowledge Explorer by Open Source |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .NPS | Open Source | Settings Files | Natron Node Presets File |
| .UB | Waveform Software | Audio Files | Unsigned Byte Audio File |
| .MOL | Interscape | Data Files | MDL Molfile |
| .IO | Open Source | Compressed Files | CPIO Compressed File Archive |
| .PBN | Open Source | Game Files | Portable Bridge Notation File |
| .TRI | Singular Inversions | 3D Image Files | FaceGen Polygonal Model File |
| .SAL | Oracle Corporation | Developer Files | SQL Application Language Source Code |
| .ECW | ESRI (Environmental Systems Research Institute) | Raster Image Files | Enhanced Compression Wavelet Image |
| .RMP | RealNetworks | Video Files | RealPlayer Metadata Package File |
| .ZPAQ | Open Source | Compressed Files | ZPAQ Compressed Archive |
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