Allow the calculator to use RPN notation
I would recommend you design a feature into the calculator where users could make it behave like one of the classic Hewlett Packard calculators. I find the reverse polish notation to be much faster for carrying out computations.

4 comments
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Pierre-Philippe Martin commented
To me, this is the most important feature which should be added A.S.A.P.
I am happy to see that it is now under review. -
Guillermo commented
RPN mode (commonly used by HP calculators) is more efficient than the usual entry mode. Add an option or button to switch to RPN mode.
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Anonymous commented
can you please make it switchable to RPN?
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Anonymous commented
Support RPN mode