For information about Jam/MR, please see:
http://www.perforce.com/resources/documentation/jam
The source code is maintained in the Perforce Workshop.
The files on this ftp site under /jam/src are a mirror of the files in the //guest/perforce_software/jam/src path in the Workshop.
Copyright 1993-2015 Christopher Seiwald and Perforce Software, Inc.