This is a calculator which uses Reverse Polish Notation, or RPN. A full write-up in Japanese (Google Translate link) carries an impressive level of detail about the project, ...

There’s something about Reverse Polish Notation (RPN) and the calculators that use it. It calls to mind a time when a calculator was a serious tool, and not just a throwaway toy.

# The now classic “Reverse Polish Notation” (RPN) first used in the HP-35 has become the most efficient way known to computer science for evaluating mathematical expressions.

The introduction of a new calculator is significant because a few years back speculation was rampant on the Internet that HP was about to exit the calculator business, causing many hard-core fans of ...

It looks like a fourth generation of my family is going to be introduced to the ways of reverse Polish notation calculators.. That's because my three-year-old son, an iPhone fan in his own ...

– A RPN (Reverse Polish Notation) calculator of billet walnut case. There are multi-functional RPN calculators with numbers of small keys. However, daily use RPN calculators with large and light ...

I have to go buy a new calculator for my combinatorics class, ... I find myself stumbling without the joys of reverse Polish notation to keep track of my calculations. Fast-forward to 2007, ...