Empire of the Sum pt.6 July 15, 2024 Todays blog post is more Empire of the Sum: The Rise and Reign of the Pocket Calculator, enjoy! The Cal Tech Prototype The Pocketronic The Busicom Handy LE aka LE-120A The Busicom 141 PF Intel’s Seminal 4004 CPU Hewlett-Packard’s HP 9100A prototype HP 35 Pocket Calculator Cochran algorithm