Programming Pad for RPL Programs

[John R]

To continue a tangent: emacs actually has a built-in calculator (M-x calc, or C-x * *) that is "very roughly based on the HP-28/48 series of calculators," according to the manual:

http://www.gnu.org/software/emacs/manual.../calc.html

I haven't ever really used it, but it's nice to know it's there. (And also nice to know that RPN is the default entry mode.)