> Alas, CopyLeft had not yet been invented, the UC sold the P-System and we lost legal access to the code we'd written. Compare with UC Berkeley's BSD UNIX, wh

> Alas, CopyLeft had not yet been invented, the UC sold the P-System and we lost legal access to the code we'd written. Compare with UC Berkeley's BSD UNIX, which was originally open sourced in 1988 (though hamstrung from 1992-94 by the Unix lawsuit, opening the way for Linux), and happens to be running in the system I'm typing on... It appears that UCSD eventually (2006?) made the p-System 1.5 source code available for download, but unfortunately non-commercial only (CC BY-NC-SA?) rather than BSD, etc.