Gary sez:
" As John noted, RPN works exactly the way you'd do the calculations with
pencil and paper, so it is a natural and familiar way to work for people
who
are comfortable with doing hand calculation. "

I will have to agree, as I often begin calculating in the middle of a
lengthy expression. Problem is, you have to record the interim results and
some care is required to maintain those results. I can do it, but it is so
much easier to begin at the beginning and enter things sequentially in AE.
Thanks Gary, I didn't realize RPN was a product of the 20s. It would seem
that for really lengthy calculations, RPN would be a labor saver.

Bob Swinney