Re: linux-kernel-digest V1 #94

Michael Shields (
Sun, 25 Jun 1995 19:55:58 +0000 (GMT)

> The Lions book was never in print in terms of being availible. AT&T
> squashed it pretty hard, you could only get a copy if you were in the
> class. Of course, a number of people had (and have) third, fourth and
> more generation copies of it. Its still illegal to posess, however.
> (Though I don't know how long the situation would last. Copyright lasts
> years, but the big thing with the Lions book was trade secret, not
> copyright)

Copyright on works before 1978 lasted 28 years and could be renewed for
28 more. It now lasts until fifty years after the death of the last
author, or one hundred years for pseudonymous or corporate authors.

Once a trade secret's out, it's out. However, the expression of the
idea is still copyrighted. This means that if I read the Lions book,
I could write a new book on V6 using what I learned from it, but couldn't
use the actual text (except for brief "fair use" quotations).

So, sorry, still illegal.

Standard disclaimers!,