One may end up with x-y values from experiments
or any other situation which may not always be linear in nature.
Under such circumstances it is rather difficult to perform differentiation
or achieve a best-fit to the data, either due to the fact that
the differentiation gets too noisy or the best-fit may not be
a true representation of the original data! In this algorithm,
a parabolic curve is plotted through the x-y values and the output
of differentiated and best-fit values are written to a file. This
program requires Microsoft Windows 3.
(from the documentation)