This may already be familiar to CPM users on the board but if not (and if you have a lot of spare time) there is some interesting material here:
1. Info-CPM Digest July 90
http://www.retroarchive.org/cpm/cdrom/SIMTEL/ARCHIVES/CPM/9007-1.TXT (http://www.retroarchive.org/cpm/cdrom/SIMTEL/ARCHIVES/CPM/9007-1.TXT)
2. Main Page - CPM & MS-DOS (Last update Oct 18)
http://www.retroarchive.org (http://www.retroarchive.org)