Who invented DOS?

[John Allain]

> ...OS/8 :-).  (Which was, in turn, a souped up DMS.)

Since it's 100% on topic and as of now unknown to me,
what is DMS?

{Stretching}
> There's plenty of geek haggling at Slashdot, natch:
> http://yro.slashdot.org/article.pl?sid=05/03/03/2329228&tid=190&tid=123

These articles say that Kildall's CP/M easteregg appears in DOS 1.0 or so.
Has anyone here actually run the proof for themselves?

John A.