No doubt people are missing from this list, but Robot has benefited
from code and comments from at least: Alberto Meroni, Carlos Puchol,
Jacques Steyaert, Blair Zajac. The original ARK plotting package was
written by Alan Smale, Robin Corbet, Koji Mukai, and Tim Naylor. This
in turn was based on the MSSL (Mullard Space Science Laboratory)
plotting package.