Files that contain the .man file extension are most commonly associated with the Unix Man utility program.
Unix Man is used to view documentation that contains information about Unix commands and functions. These files are normally stored in a plain text format.
In most cases the MAN files that are used by the Unix system will not be stored with the .man file extension. Instead, they will be given a series of extensions ranging from .1 to .8.
The .man file extension has also been known to be associated with the Microsoft Windows 2000/XP operating systems. These MAN files contain the mandatory user profile files that are used by the operating systems.
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