The firmware meanwhile uses the orange C key from the original calculator as a function key, alternating between standard and scientific operations. If you’re curious about RPN, we’ve taken a ...

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, but in short ...

dc is a command-line calculator. But it's not just any calculator. It works in Reverse Polish Notation (RPN). In contrast to ...