Plus42 is an advanced scientific programmable calculator, based on
Free42 (a complete re-implementation of the HP-42S scientific
programmable RPN calculator) and adds:
A Larger Display, with 8 rows and 22 columns (131x64 pixels) by default,
which the user may resize at will;
Algebraic Expressions modeled after those used on the HP-27S and
HP-17B/19B;
attached Units and unit conversions modeled after those used on the
HP-48/49/50 series;
Directories for more organized storage of programs and variables;
TVM and amortization tables;
and two-dimensional Plotting of functions, with ability to zoom and pan,
and find integrals and roots from points in the plot.