The early HP Reverse Polish Notation calculators have a special place in the hearts of engineers and tinkerers as there are lots of projects involving them. They haven’t been produced in decades, but ...

In the era of the smartphone, an electronic calculator may seem a bit old-hat. But they continue to hold a fascination in our community, both when used for their original purpose, and as objects for ...

If you are interested in building your very own RPN calculator you might be interested in a new project published to the Instructables website this week by member Shiura. Using a CNC machine, the ...

Some sad news for those people who value RPN entry logic. Aside from a trio of graphing calculators, HPAQ has killed RPN as an option on their regular scientific calculators. This is the end of an era ...

Today is a happy day for engineers everywhere. Well at least for those of us of a certain vintage. HP is introducing a retro model of its first hand-held scientific calculator, the HP-35, to mark the ...

In my experience, once you are used to it, RPN is faster for entering complex equations. That doesn't make it better, though. It's only really important if you are doing calculations all the time and ...