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From: "Nellis, Kenneth" <Kenneth DOT Nellis AT xerox DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: RE: PATHEXT is fundamental to Windows and Should be recognised by CYGWIN
Date: Fri, 5 Aug 2016 18:14:13 +0000
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From: Erik Soderquist
> ... DOS did a lot of things
> against already established conventions, such as using a backslash
> instead of a forward slash as the directory separator, just "to be
> different".

Not just to be different, but to distinguish from slashes used as 
command qualifiers (a la VMS), don't you think?

--Ken Nellis