David Flanagan (MIT Project Athena), Chris Craig (MIT Project Athena), and
Kambiz Soroushian (MIT Project Athena) wrote an earlier version (V4) of the At
Plotter Widget Set. The version V5 was substantially rewritten by Gregory Bond,
Burdett, Buckeridge and Young Ltd. (gnb@bby.oz.au).  Addition of free style XY
axes, XY lineplots and re-additon of the callbacks (from V4) and other minor
changes for this version (V6.0) were done by Peter Klingebiel, University of
Paderborn (klin@iat.uni-paderborn.de).

Copyright 1990,1991 by the Massachusetts Institute of Technology
Copyright 1991 by Burdett, Buckeridge and Young Ltd.
Copyright 1992 by University of Paderborn

All rights reserved.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, provided that
the above copyright notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting documentation, and that
the name of the Massachusetts Institute of Technology (M.I.T.) not be used in
advertising or publicity pertaining to distribution of the software without
specific, written prior permission.

THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.