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TRURL is a suite of desktop calculators with reverse Polish notation (RPN) written in Object Pascal. Additionally, it comes with a free reusable class library (RPN Engine) as a toolbox for creating your own calculator. TRURL is an acronym for "TRURL is a Reusable Universal RPN Library". Class Libraries: • RPN Engine: Full-featured calculation engine for Pascal-based RPN calculators • Segmitator: Library for virtual seven-segment displays Applications: • TRURL A: Simple demo app...

rpnstring has a small amount of command by it self. Instead it provide interface to the C math library. The user can make own commands by using the macro facility. In that way the calculator can be adapted to each user according to the users needs.

An RPN calculator in Java with a minimalistic interface, designed to be stylish, complete and useful.