Modules

evaluate Perl command line parameters.
Hewlett-Packard RPN calculators
display Liquid Crystal Display symbols.
a 2 position horizontal or vertical switch.

Provides

in Tk/Calculator/RPN/HP.pm
in Tk/Calculator/RPN/HP.pm
in Tk/Calculator/RPN/HP_16C.pm
in Tk/Calculator/RPN/HP_21.pm