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+Use and copying of this software and preparation of derivative works
+based upon this software are permitted.  However, any distribution of
+this software or derivative works must include the above copyright
+notice.
+
+This software is made available AS IS, and neither the Electronics
+Research Laboratory or the University of California make any
+warranty about the software, its performance or its conformity to
+any specification.
+
+
+Animation and differentiation routines were added by Paul Walker,
+NCSA and UIUC Dept of Physics.  The following copyright and disclaimer
+applies to these parts of the code only.
+
+UNIVERSITY OF ILLINOIS (UI), NATIONAL CENTER FOR SUPERCOMPUTING
+APPLICATIONS (NCSA), Software Distribution Policy for Copyrighted
+Software
+
+The above mentioned modifications to XGraph made with the authors
+consent are copyrighted, but available without fee for education,
+academic research and non-commercial purposes.  The modifications are
+copyrighted in the name of the UI, and ownership of the modifications
+remains with the UI.  Users may distribute the binary and source code
+to third parties provided that the copyright notice and this statement
+appears on all copies and that no charge is made for such copies.
+Any entity wishing to integrate all or part of the source code into a
+product for commercial use or resale, should contact the University of
+Illinois, c/o NCSA, to negotiate an appropriate license for such
+commercial use.
+
+UI MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE SOFTWARE FOR
+ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED
+WARRANTY.  THE UI SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY THE
+USER OF THIS SOFTWARE.  The software may have been developed under
+agreements between the UI and the Federal Government which entitle the
+Government to certain rights.
+
+By copying this program, you, the user, agree to abide by the
+copyright conditions and understandings with respect to any software
+which is marked with a copyright notice.