Changes to Microsoft Windows between r0 and r1

'''[http://www.microsoft.com/ | Microsoft](R) [http://www.microsoft.com/windows/ | Windows](R)'''

See also [Win32]
(blank line)
History:
   1. December 1980: [http://en.wikipedia.org/wiki/86-DOS | 86-DOS] v0.33
   1. April 1981: [http://en.wikipedia.org/wiki/86-DOS | 86-DOS] v1.0
   1. July 1981: [http://en.wikipedia.org/wiki/86-DOS | 86-DOS] v1.14/[http://en.wikipedia.org/wiki/MS-DOS | MS-DOS] v1.01
   1. March 1982: [http://en.wikipedia.org/wiki/MS-DOS | MS-DOS] 1.25

Legend

     Only in r0
     Only in r1
     -->      Modified slightly between r0 and r1