Who invented DOS?

4 Mar 2005

...

http://yro.slashdot.org/article.pl?sid=05/03/03/2329228&tid=190&tid… 
 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? 
 What CP/M easter egg?  That ensuing discussion lacks any useful detail. 
For people who haven't read it, here's what it said:

"IIRC, Killdall stood up in court and entered a keystrokes at a PC
 running MSDOS and brought up an easter egg he had programmed
 into CP/M years earlier, proving they had used his code."

What we're trying to figure out is the keystrokes and the MSDOS version.

Here's another account: http://dfarq.homeip.net/article.php?story=935

"Back in the mid-1990s, PC Magazine columnist John C. Dvorak wrote
 something curious about this operating system. He said he knew of an
 easter egg present in CP/M in the late 1970s that caused Kildall's name
 and a copyright notice to be printed. Very early versions (presumably
 before the 1.0 release) of DOS had this same easter egg."

John A.

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Who invented DOS?