All, I asked Peter Salus if there is an electronic version of his great book "A Quarter Century of Unix". There isn't one, so I scanned my book in. Peter has given TUHS the right to distribute the scanned version. I've just added a link to the PDF of the scan here: http://wiki.tuhs.org/doku.php?id=publications:quarter_century_of_unix But, if you can, buy the paper version as well! Many thanks to Peter for his generosity. Cheers, Warren