DOS 1.0 copyright string

From: Fred Cisin <>
Date: Mon Sep 10 13:09:54 2001

> Maybe I misunderstood the timing of the message, but I thought that
> the 1.0 version of DOS contained copyright information from Digital Research
> and when IBM found out, they compelled MS to expunge it, resulting in the
> 1.1 version.

Urban myth
possibly based on exaggerations, or misunderstandings of copyright.

MS/PC-DOS 1.0 does not appear to contain any direct DR code, but it IS
blatently, admittedly, and understandably based directly on CP/M, since
QDOS consisted of a placeholder to substitute for an OS while waiting for
CP/M-86 to become available.

But the same identical story is TRUE for NEWDOS! -- versions prior to
-80 contained an encrypted copyright message by Randy Cook (changed to
Tandy Corp in TRS-DOS 2.3).

Grumpy Ol' Fred
Received on Mon Sep 10 2001 - 13:09:54 BST

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