Is the HP 50g the last RPN calculator?

[Claudio L.]

(09-25-2018 12:38 AM)Joe Horn Wrote:  What's this silliness about the 50g not being RPN? Here are two reasons why it *is* RPN, in my famously humble opinion.

(1) Press [MODE]. What options does it give you in the very first line? Algebraic and RPN (not RPL). And the manual calls it RPN. So if HP and the 50g itself call it RPN, it's RPN.

(2) Don't forget that "RPN" is an acronym that actually stands for something. Just as "1+2" is algebraic notation, "1 2 +" is Reverse Polish Notation. Which of those expressions are understood by the 50g? BOTH of them. So it's both an algebraic and an RPN machine. Furthermore, RPN (the NOTATION) makes no assumptions whatsoever about the size of the stack or the existence of a command line or the existence of stack lift disabling. Those things have nothing to do with whether a machine is RPN or not; they are merely different ways of IMPLEMENTING RPN. If the user calculates 1 plus 2 by keying 1 2 +, then the machine is RPN. The rest is details.

About time somebody added a bit of common sense to that senseless argument RPN vs RPL. Much appreciated.