There's a non-pdf version on Ritchie's homepage[1], but at the moment that's not responding. I just thought today was a good day to read or re-read this succinct description of UNIX from Ritchie and Thompson.<p>[1] <a href="http://cm.bell-labs.com/who/dmr/cacm.html" rel="nofollow">http://cm.bell-labs.com/who/dmr/cacm.html</a>