| File Extension: | HCO |
| File Type Description: | Macintosh Sound Resource Fork File |
| File Type Developer: | Apple |
| Primary Associated Software: | macOS |
| Primary Software Developer: | Apple |
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Apple developed the HCO file extension, also know as a Macintosh Sound Resource Fork File file, for the macOS software package. Our internal web tracking data indicates that Windows 10 operating system users, and those living in United States, are the most likely to use Macintosh Sound Resource Fork File files. Statisically, these users are most likely running the Google Chrome internet browser.
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .DSN | Cadence Design Systems | CAD Files | OrCAD Design File |
| .DOTX | Microsoft Corporation | Page Layout Files | Word 2007 XML Template |
| .BTREE | Apple | Database Files | Apple Mac OS HFS+ B-tree File |
| .3GPP2 | Apple | Video Files | Multimedia Files For Wireless Networks |
| .JS | NetScape | Web Files | JavaScript File |
| .BANNER | Apple | Data Files | Golden Orchard Apple II CD Rom File |
| .MP21 | AXMEDIS Products and Services | Video Files | AXMEDIS MPEG-21 Object |
| .BLANK | Unknown Developer | Data Files | Unknown Apple II File. (found On Golden Orchard Apple II CD Rom) |
| .ISO | Igor Pavlov | Disk Image Files | Disc Image File |
| .BLOSSOMS | Apple | Data Files | Golden Orchard Apple II CD Rom File |
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