John Lions and his UNIX commentary

Many computer science graduates students had Nth-generation photocopies of an underground UNIX classic: John Lions' commentary on the UNIX source code. At UCSB we used the photocopies as the text for our graduate operating systems class.

The Usenix association is matching donations to fund the John Lions Chair in Operating Systems. Read more about it.

While you're thinking about it, you can replace your tattered, almost-unreadible photocopy with a reprint of the Lions' commentary -- and it's legal!

Or, just download a copy that originally appeared in the alt.folklore.computers discussion group.