[Coco] Cocopedia updated

[Richard E. Crislip]

Re read what I wrote Richard. I wrote RPN, for Reverse Polish Notation. 
First popularly used in HP's calculators in the 60's as it simplified 
the calculators design and reduced its memory usage considerably over 
that of a calculator that has to keep track of stuff by the normal 
algebraic rules, making sure it follows the normal operator precedence. 
Simplified to the bone, you place the values of two items on the stack, 
then issue the +=, - =, /=, or *= command to get the answer. Cheers, Gene
Ooohh Crap! I should have know that <sigh> I believe it is used in C++ 
too. I did mis-read Bill's message though. I was about ready to REALLY 
display my ignorance by asking what RPN stood for 8-/. Oh... I guess I 
just did 8-))