Mathcad is advertised "You use it the same way you
learned how to do mathematical calculations in the first place:
on a scratchpad." You enter text, equations, functions, matrices,
etc. in free form and answers are calculated automatically. Standard
functions, matrices, statistical functions, curve-fitting, two
and three dimensional plots, Fourier transforms, solving up to
50 simulataneous linear and nonlinear equations and inequalities
with up to 50 variables, iterations, numerical integration and
differentiation are features to both the DOS version 2.5 (demo
contained in mcaddos.zip) and the MS Windows version 4.0 (demo
contained in mcadwin.zip). There are symbolic capabilities in
the latter version (contains the core functions of Maple's symbolic
engine for deriving and simplifying formulas) which permits symbolic
expanding, factoring, differentiation, integration, solution for
a variable, substitute for a variable, expand to series, conver
to partial fractions, etc. The Getting Started Handbook shows
you some of the exciting things which can be done with the MS
Windows version of Mathcad; to start this handbook, run the program
and choose the item Getting Started from the Help menu.

An IBM compatible computer with 512K RAM is needed
to run the DOS version and an 80386 or higher IBM compatible with
at least 4 MB of memory and MS Windows version 3.1 or later is
needed to run the MS WIndows version.

As would be expected with a demo a number of features
of the program are disabled but there are a large number which
are enabled to give the user a feel of the program.