RPL, or Reverse Polish Lisp, is a programming language that is primarily used in HP (Hewlett-Packard) calculators, particularly the HP-48 series. RPL combines elements of both Reverse Polish Notation (RPN) and Lisp-like features, enabling a unique approach to expression evaluation and program structure. The character set in RPL consists of various symbols that are used to represent operations, variables, and control structures.
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