Plus42

Plus42 brings the legendary functionality of the HP-42S programmable calculator to your computer or mobile device. This comprehensive software is a direct spiritual successor, developed with inspiration from the Free42 project. It replicates the authentic Reverse Polish Notation (RPN) experience, offering a complete toolkit for complex calculations, programming, and problem-solving. All the advanced features—from sophisticated math functions to programmable routines—are integrated into a single, concise application. It's the perfect digital preservation of a classic tool, updated for contemporary use without sacrificing the precision and workflow that made the original hardware so revered by technical professionals.