On Wed, 16 Oct 2013, Ed Vance wrote to Holger Granholm:

 EV> You must have had one of those HP Reversed Polar calculators 
 EV> (RPN?) like the one shown to me back then. IIRC the fellow said 
 EV> his company paid around $300.00 USD for it. 

Reverse Polish Notation

 EV> As he was showing me what he could do with it I couldn't get the 
 EV> hang of it.

 EV> I am use to 4 + 4, not 4 Store 4 + showing a 8 on the screen. 

yup! that's RPN... it works just like a computer does... you put the number
in a register and the next number and finally you tell it what function to
preform on the two numbers...

)\/(ark

--- FMail/Win32 1.60