The definition of each of those bits follows: (Cool web site)
The definition of each of those bits follows: Read-only The file s contents can be read by a user but cannot be written to. System This file has a specific purpose required by the operating system. Hidden This file has been marked to be invisible to the user, unless the operating systems is explicitly set to show it. Archive This file has been touched since the last DOS backup was performed on it. Note that there is no bit to specify that a file is executable. DOS and Windows NT filesystems identify executable files by giving them the extensions .EXE, .COM, .CMD, or .BAT. 158
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