50g

> 
> I will keep practicing as well as getting more referance material.
> Hopefully some day I will understand why you up-to-date HP'ers say RPL  
> rather than RPN.  Even the skimpy documentation uses RPL. 

RPN refers to the way math is done, ie RPN or ALG; RPL refers to the
programming language, Reverse Polish Lisp, which traditionally uses
RPN/stack based logic.