On Thu, Aug 6, 2020 at 4:22 PM Clem Cole <clemc@ccc.com> wrote:

[hint often its HW releases which are a terrible idea, but that's a topic for COFF].

Or for a "history of MS-DOS" list, if there is such a thing. DOS 1.0 for floppies, DOS 2.0 for 10 MB hard disks, etc. etc. It was in 2.0 that MS-DOS got all the Unix it was ever going to get.