[TUHS] Copyright notices in Edition 5, removed in Edition 6
norman at nose.cs.utoronto.ca
Wed Dec 24 18:17:57 AEST 2003
Larry J. Blunk:
Apologies if this has been answered before, but I noticed
that there are AT&T copyright notices in the kernel sources
for Unix Edition 5, but they were removed in Edition 6.
[...] I noticed that USL registered Editions 5, 6, 7 and 32V in
1992. I would assume that Editions 4 and earlier are free
and clear [...]
As I understand it, Editions 7 and 32V could have had copyright
protection without registration since they were released after
1978. However, because they lacked copyright notices when
released, they may very well be considered public domain. It was
not until 1989 that the requirement for including
copyright notices was dropped.
Notwithstanding other comments about the history, for practical purposes
none of this matters for Seventh Edition and 32V and anything earlier,
because Caldera (as it then was) open-licensed them in January 2002;
see http://www.tuhs.org/Archive/Caldera-license.pdf. To be precise,
that license covers
32-bit 32V UNIX
16 bit UNIX Versions 1, 2, 3, 4, 5, 6, 7
with specific exclusion of System III and System V and successors.
That is why source code for the Seventh Edition system (for example)
is openly accessibly on the TUHS web server.
Among those whose dog work produced first a hobbyist-specific per-person
license, then the current BSD-like license, was Warren Toomey, who manages
that web server and this mailing list. I don't think it will give him
a swollen head (or a wooden leg) to thank him now and then, and I do so here.
Long-time readers know all that, but those who have joined us recently
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