Quote:...Bill Gates wrote DOS it was a stroke of genius...
I'm not sure which of these two claims I find more dubious.

DOS was authored by a company called Seattle Computer Products and was purchased by Mickey in 1981 for something around $50,000 (that may be genius). Harry Evans, author of
They Made America, called DOS a "slapdash clone" and a "rip-off" of Gary Kildall's OS: CP/M. Tim Paterson, the author of DOS is suing Evans for defamation. Of course, Kildall freely admitted (until his untimely death) that CP/M was "inspired" by DEC's RT-11 OS.
Meanwhile, back at Bell Labs, Unix was already (since 1971) multi-user, multi-process, 32-bit, bullet proof, standards based, and a number of other adjectives that Mickey wouldn't get around to for another couple of decades. Actually, come to think of it, Mickey still isn't really multi-user.