RPN = "Reverse Polish Notation"
"Algebraic Mode" is the way most calculators work. For example, for 5x7=35
5 (times button) 7 (equals button) ... 35
In RPN, you enter 5, then 7 and press x to get the product.
5 (enter button) 7 (times button) ... 35
For simple things like 5x7 or 3-2, algebraic mode is more intuitive. RPN really helps with longer calculations that involve parentheses and such. You work from the innermost parenthesis outward. It's pretty smooth once you get the hang of it. Now that algebraic calculators have parentheses buttons, it's no longer an essential tool, but those who like it tend to say it's an elegant solution. Turns out that if you have RPN, you never or almost never need to use parentheses or write down intermediate answers to solve a problem.
Edited 1 time(s). Last edit at Thursday, August 3, 2006 at 01:20PM by bchadwick.