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 ...

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 ...

How many of us have an everyday tool that’s truly unique? Likely not many of us; take a look around your desk and turn out your pockets, but more often than not, what you’ll find is that everything ...

As Micky Mouse (1928–) once famously said: “Arithmetic is being able to count up to twenty without taking off your shoes.” As Micky Mouse (1928–) once famously said: “Arithmetic is being able to count ...