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CALC (5) - Advanced RPN calculator with graphical interface; mouse, menu-driven. : John Kennedy : Free Download, Borrow, and Streaming : Internet Archive
The World of Calculator Emulation – things to see and try | https://frrl.wordpress.com
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Touch RPN Calculator Download
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/i/402581/products/2022-01-18T15%3A58%3A12.530Z-3d_printed%20case%20w_overlay.jpg?1642492736 "PX16C an HP16C Programmers Calculator Emulator from HobbyStone on Tindie")
PX16C an HP16C Programmers Calculator Emulator from HobbyStone on Tindie
Reversing Sinclair's amazing 1974 calculator hack - half the ROM of the HP-35
