The thing called "DOS 7" or 7.1 that I'm referring to is a construct put
together by some people from the DOS files contained in the release of
Win-98se and Me.
This "MS-DOS 7" is theoretically what Microsoft would have created had
it elected to release a successor to 6.22.
For some reason my NNTP server flags the following URL as "banned", but
it's a harmless URL:
http:\\ms-dos7.hit.bg
Remove the spaces between hit and bg and go to that webpage.
You will get a complete description of this "MS-DOS 7.1" and will be
able to download it.