Oh yes, the UCSD-p system. A beautifully baroque system with oddly obscure system libraries and its statically designed file system, which drove many a user to madness. The editor was nice. And made me receptive to vi. In the first years of my computer science classes, I still had fun with UCSD Pascal - unfortunately, it was then switched to CP/M and first Pascal M and then Turbo Pascal.
At heise online news there is the original article.