XNed Batchelder co-developed the original troff version of this
Xprogram with the author, and was responsible for much of the overall design.
XGreg Hager provided an initial TEX implementation.
XFigure 1 and the three broken out figures in
Xthe abstract were taken from examples in The PostScript Language
XTutorial and Cookbook.
XThe image in figure 3 was designed by Kamran Manoochehri, rendered with
XCARICATURE, by Cary Phillips.
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