!!! Overview
[{$pagename}] ([HKCR]) [Windows registry] key contains file name extension associations and COM class registration information such as ProgIDs, CLSIDs, and IIDs and is primarily intended for compatibility with the registry in 16-bit Windows.


[{$pagename}], Windows 2000 and above, is a compilation of user-based [HKCU]\Software\Classes and machine-based [HKLM]\Software\Classes. If a given value exists in both of the subkeys above, the one in [HKCU]\Software\Classes takes precedence.[8] The design allows for either machine- or user-specific registration of COM objects.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]
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* [#1] - [HKEY_CLASSES_ROOT Key|https://docs.microsoft.com/en-us/windows/desktop/sysinfo/hkey-classes-root-key|target='_blank'] - based on information obtained 2018-10-18-