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originally posted by: Flyingclaydisk
Anyone know what RPN logic is? I made my way through Engineering and Physics knowing my way about the RPN logic register. Anyone know this?
It's the most effective computation system known to man...and, it's called "Reverse Polish Logic". The equations I could crack open were endless on the HP45. I was a Surveyor then, in construction. Long lost my HP-45's, but recently I got a HP-31 with RPN, and it just stuns people how fast I can crunch difficult equations in far less steps than on paper.
They say RPN is "difficult to understand", for kids now. I learned it in college. It's one of the best mathematical systems ever developed.
X^up...Y^down...A and B are variables...now, let's compute!
Sorry, I like math. Math is everything, along with physics.
That is all.
originally posted by: Flyingclaydisk
I guess the logical question at this point is...what if your problem/formula requires more than four memory registers?
There are a couple of options. One option is to change the number of registers available, which is easily done, but isn't usually required. The simpler solution is to use the calculator's traditional memory slots (which are pretty much infinite). This was probably pretty smart on HP's part, because they likely figured most people won't be able to mentally keep track of much more than 4 levels of an active computation at once. So they figured most would probably notate some form of a subtotal at this point and store it somewhere thus compartmentalizing elements of the problem at known calculation points.