MyCalculator - MyCalculator is intended as a relatively simple postfix (i.e. reverse-polish notation or RPN) calculator for the Newton MessagePad. MyCalculator has not been thoroughly tested. Use it at your own risk. If you are calculating something important, double-check your results with some other variety of calculation. Numbers are restricted to six digits after the decimal point, mostly so that they'll fit on the screen. The use of the number and operator keys should be pretty obvious since all of the stack is visible on the screen. Includes full documentation.