Nightfox wrote to All <=-
As we all know, Microsoft was the company that made the deal to license
an operating system to IBM, and the rest is history. But before IBM contacted Microsoft, IBM first went to DRI for an operating system but failed to make a deal because DRI's CEO, Gary Kildall, was absent that day: http://bit.ly/1IHX4xc
That was a real shame, CP/M-86 and especially MP/M-86 (which became Concurrent DOS or something) are far nice OSes than MS-DOS.
DRI had figured out multitasking OSes that actually worked for Z80s, with Microsoft we got to wait until Windows NT for the same functionality.
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