RPN-65 Pro 4.1

The RPN-65 Pro presents itself as the first complete simulation of Hewlett-Packard's innovative HP-65 programmable calculator tailored for iOS devices. Originally launched between 1974 and 1977 at a staggering price of $795—equivalent to approximately $5,000 today—the HP-65 was remarkable not only for its programmability but also for its motorized magnetic card reader, all while being compact enough to fit into a shirt pocket.

This application allows users to experience the functionalities of this groundbreaking calculator directly on their iPads. RPN-65 Pro includes 170 original HP programs, facilitating an immediate start for users familiar with the HP-65's capabilities.

Review excerpt: "A work of art. Fantastic!" - MacBreak Weekly, episode 572

Key Features:

• Virtual program and data cards
• Virtual paper tape printer with AirPrint support
• Robust database-driven card manager
• Create, delete, label, and organize an extensive number of cards
• Sharing options: e-mail, AirDrop, Dropbox, copy, paste, and print
• Pasting existing HP-65 listings into RPN-65 for execution
• "Live" display of stack, memory registers, program counter, and flags
• Compatibility with data cards created by RPN-67 Pro and RPN-97 Pro
• External hardware keyboard support

RPN-65 Pro can be operated in one of four distinct modes:

1. As the original HP-65
2. The original experience with enhanced speed
3. User interface improvements including backstep key and program step navigation
4. "Super-65" mode featuring 999 program steps, 120 labels, 120 registers, nested subroutines, and more

For further details, including free program downloads and a comprehensive calculator handbook, please visit the RPN-65 website: cuveesoft.ch/rpn65.