The HP calculator was the darling in my engineering college, but I confess that I never liked it very much, just had the "enter" key and did not have the "="... Major fault ...
Nice photo by the way...
author says:
The use of RPN ( Reverse Polish Notation -- No equal)is something that took awhile to get used to but I am confused by calculator that have an equal button after using HP for 35 years
(5 years and 2575 days ago)
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I'm starting to do the operation ... if I can.
Nice idea, nice picture, bravo
It seems a difficult and terrifying game, for children ...
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