
(Extract from README.DOC)


Diff 2.2-S  -  Differential Calculus
=====================================

Differentiate almost any analytical function, show the complete
step-by-step breakdown of the differentiation process if you want
to, and plot a graph of the function and its derivative on screen
or a dot matrix printer.

Diff is ideal as a teaching aid for showing how to differentiate
complicated functions, or for engineers and scientists who need
to find non-trivial derivatives. Diff is very easy to use, and
incorporates on-line help with over 130 screens of information for
those who want to delve deeper into its facilities. The graphics
utility lets you see with as little as 2 keystrokes what the function
and its derivative look like over any range of values, and you can
tailor the graph to your own requirements.

A number of options are available to control the differentiation. For
example you can specify strict integer arithmetic to keep the answer
exact, or you can use real arithmetic. Several routines are
incorporated for automatically tidying up math expressions, and you
can also set options to control Sorting and Factorisation of math
expressions.


REQUIREMENTS
=============
Required:  512k RAM
Optional:  Graphics card (CGA, EGA, VGA, Hercules and some others) for
           graphs.
           Dot matrix printer for printing the graphs.


REGISTRATION
=============
Registration is US$69-00. Registered users receive the latest regis-
tered version with 80x87 support, a printed manual, and other
products.

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