Approximately how many CP/M-86 copies or licenses did Digital Research sell across the product life of the operating system? Are there any data or estimates?

I know the success of MS-DOS didn't leave CP/M-86 much market share, but it would be interesting to have some figures.

  • 1
    A datapoint: In Denmark the Danish computer vendor Regnecentralen used first CP/M-80 and then on their public school computers CCP/M-86 (ending with Concurrent DOS). They had four virtual consoles similar to what Linux provide today. Very nice machines. I do not know the sales numbers. Sep 25, 2022 at 17:57
  • 2
    I’m guessing there might be some ambiguity as to the product life of C/PM-86 given how it morphed through Concurrent DOS into DOS Plus, which begat DR DOS. Presumably the cut-off would be between those final two, i.e. up to the point that the CP/M interface was removed?
    – Tommy
    Sep 25, 2022 at 18:11
  • It's a good point but I'm not sure such detailed data are available, so for the time being it may be better not to constrain the product life. Sep 25, 2022 at 18:29
  • The DEC Rainbow came with a version of CPM that could run CPM-86 code and also CPM-80 code. The name was something like CPM-80/86. Sep 26, 2022 at 10:43


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