Tags: Programming Language.
The RPL programming language (RPL meaning ROM-based procedural language following Hewlett-Packard or alternatively Reverse Polish LISP) is a handheld calculator system and application programming language used on Hewlett-Packard’s engineering graphing RPN calculators of the HP-28 HP-48 HP-49 and HP-50 series but it is also usable on non-RPN calculators such as the HP-39 series.