| File Extension: | OC_ |
| File Type Description: | Compressed ActiveX Control File |
| File Type Developer: | Microsoft Corporation |
| Primary Associated Software: | Microsoft Windows |
| Primary Software Developer: | Microsoft Corporation |
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Compressed ActiveX Control File files were originally developed by Microsoft Corporation for the Microsoft Windows software application. Data from our web servers (annonymous users) show that OC_ files are most popular in United States and are often used by Windows 10. A vast majority of these users are opting to use Google Chrome as their preferred internet browser.
 | Microsoft Windows by Microsoft Corporation |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .CHK | Sophos | Data Files | InterCheck Checksum Database |
| .WMDB | Microsoft Corporation | Database Files | Windows Media Database File |
| .BDP | Microsoft Corporation | Text Files | Exchange Diagnostic Message |
| .MNX | Autodesk, Inc. | Encoded Files | AutoCAD Compiled Menu File |
| .OEACCOUNT | Microsoft Corporation | Data Files | Windows Mail Account File |
| .WK1 | IBM | Data Files | Lotus Worksheet |
| .ERR | Microsoft Corporation | Text Files | Error Log File |
| .JCK | Microsoft Corporation | Data Files | Microsoft Liquid Motion JACK Scene Escription |
| .SMI | Apple | Disk Image Files | Self-Mounting Disk Image |
| .PY | Python Software Foundation | Developer Files | Python Script |
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*Files that are not supported can be opened in binary format.
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