As mentioned above, the plotting routines are from ptplot by Edward A. Lee and Christopher Hylands, copyright University of California.
Everything thing else including the applet and documentation are Copyright ©1998, Kevin Schmidt and Michael A. Lee, all rights reserved, and distributed under the terms of the GNU public license.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.