RPN is nice, but I find textbook mode better

[pier4r]

As discussed in a previous topic http://www.hpmuseum.org/forum/archive/in...-9622.html , when one has the ability to edit a formula, then I find it better than rpn.

If you don't have this ability though, or the formula has quintillion of parentheses. A short rpn program may do it better.

Example. Ti 34 (from 1987) vs rpn: rpn

Sharp 506w (2002) or ti89 vs rpn : Sharp until the formula doesn't have tons of parentheses. If too many parentheses: rpn.

Equation writer vs rpn: equation writer.