RPN scientific calculator

RPN9 is a full-featured RPN (reverse Polish notation) scientific calculator. It is designed for engineers, scientists, college students and advanced high-school students.

RPN9 features circular, hyperbolic and complex trigonometry, probability and statistical functions, complex arithmetic, unit conversions, rational approximations, base conversions, logical operators, configurable display modes and non-volatile memory. RPN9 includes reference documentation.