Plus42

Plus42 is an advanced, open-source scientific programmable calculator, inspired by the legendary HP-42S. Building on Free42, it introduces a larger display, algebraic expressions, unit conversions, directories, financial functions, and 2D plotting. A powerful tool for engineers, scientists, and programmers, Plus42 blends classic RPN simplicity with modern enhancements, offering unmatched versatility for both quick calculations and complex programming tasks.