on the RPN mentioning sharp pc-1211, v.albillo, el-506w and recurring topics

[ttw]

Over the last few years after the HP45 came out, I taught lots of calculator classes, programming classes, (and lots of other stuff.) My experience is that the RPN or relatives takes about 1/2 the keystrokes of an equivalent algebraic expression. Most of my students "got" RPN quickly after I pointed out that RPN closely follows the way one evaluates an expression on with pencil and paper. (Not so much the way one writes and expression but the way one evaluates one.)