On Tue, 04 Apr 2017 12:53:17 +0100, Ahem A Rivet's Shot wrote:

> AFAIK there were no patents on Unix, there were however copyright
> restrictions on the AT&T source code which Linux avoided by the simple
> (in principle) expedient of being a clean rewrite while BSD got
> embroiled in a legal argument over which bits they could distribute and
> which bits they could not.

I thought Linux was originally a clean rewrite of Minix, which was itself
a clean rewrite of UNIX for early Intel chips/PCs.


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martin@   | Martin Gregorie
gregorie. | Essex, UK
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