These programs are for calibrating the BC-221 and LM frequency meters. If you look at the source, you will find that they were originally written by Boatanchor Bob/NA4G back in 1980, revised in 1994, and the finished by Russ Schroeder/W2DYY in 1996. Russ did the yeoman work of bringing it to a reasonable working set of programs. Kudos to him! These are in the public domain. Use them and enjoy. If you have any bug reports or comments or suggestions for improvements, email to either Bob or Russ..... rdkeys@csemail.cropsci.ncsu.edu russ@eng.mc.xerox.com 73/ZUT DE NA4G/Bob