Slightly OT: Praise the pocket calculator!

[Frank Boehm (Germany)]

http://www.shorpy.com/node/4327?size=_original

I guess we are lucky to have a result in less than a second!

[John B. Smitherman]

Hi Frank. That's an interesting photo. Try to imagine how many keystrokes and how much time that would have been saved had they been using RPN.

Cheers,

John