91
Why did Windows 95 setup use three operating systems? - The Old New Thing
(devblogs.microsoft.com)
This is a most excellent place for technology news and articles.
Yeah, that was a pretty neat thing. I remember looking through the
.cab
files from the Windows 95 installation disks and seeing files that didn't belong in Windows 95 itself. There was even a version of the "Cardfile" utility, a simplistic data organizer that was part of Windows 3.x, but not 95.