Get the latest tech news
DB48X: High Performance Scientific Calculator, Reinvented
DB48X is a modern implementation of RPL as found on the HP48
DB48X is a modern scientific calculator in the spirit of the Hewlett-Packard HP48X, featuring a complete, from-scratch reimplementation of the Reverse Polish Lisp (RPL) programming language. There is also an iPhone version if you want to run this on your phone or display graphs in colour. You can try the calculator firmware directly in your browser by clicking on the following image:
Or read this on Hacker News