| File Extension: | IO |
| File Type Description: | CPIO Compressed File Archive |
| File Type Developer: | Open Source |
| Primary Associated Software: | Linux |
| Primary Software Developer: | Open Source |
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Open Source developed the CPIO Compressed File Archive file type when the Linux was initially released. Website visitor analysis indicates that IO files are commonly found on Windows 10 user machines, and are most popular in United States. A majority of people seeking info on IO files are using the Google Chrome browser.
 | Arabian Nights by Silmarils |
 | Linux by Open Source |
 | Unix by AT&T Labs |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Linux |
 | Unix |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .STY | Jørgen Sørensen / Jososoft | Audio Files | Yamaha/Korg Keyboard Style |
| .M4S | Ubisoft | Game Files | Myst IV: Revelation Save Game File |
| .GPI | Garmin | Data Files | Garmin Point Of Interest File |
| .GIM | Sony | Raster Image Files | PlayStation Portable Image File |
| .MP3 | Moving Picture Experts Group | Audio Files | MP3 Audio File |
| .CB7 | Smith Micro Software | Compressed Files | Comic Book 7-Zip Archive |
| .SQUASHFS | Open Source | Data Files | Squashfs File System File |
| .GFB | Open Source | Raster Image Files | GIFBlast Compressed Image File |
| .PKO | Open Source | Developer Files | Packo Package |
| .ATOMSVC | Microsoft Corporation | Data Files | Atom Service Document |
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