HP 48G - Reverse Polish Lisp (RPL) Programming

A demo of RPL programming on the HP 48G graphing calculator. Reverse Polish Lisp or RPL was a new programming language HP introduced in its calculator line in the 1980s. RPL was influenced by RPN, FORTH and LISP, and provided some a much more powerful programming environment than the previous keystroke programming model. In this video I talk through three examples: a program to calculate the area of circle from a radius, a program that determines where a number is prime, and a functional program that filters a list of items based on a predicate function. For more information about the HP 48 and RPL check out the following links: - https://en.wikipedia.org/wiki/RPL_(programming_language) - https://en.wikipedia.org/wiki/HP_48_series - https://wikivisually.com/wiki/RPL_(programming_language) For a video comparing HP 48 displays check out: https://www.youtube.com/watch?v=H4qZ0eSWoaI&ab_channel=CalculatorClique For more calculator videos, check out my channel at https://youtube.com/CalculatorCulture