This can lead to teams focusing on low customer-impact failure modes It is possible to use only the RPN value as a strategy to determine which failure modes to address first. For example ...

HP famously built the first portable scientific calculator, the HP-35, although its reverse-Polish notation (RPN) might be a bit of a head-scratcher to those of us who came up in the TI world of ...

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 ...