The 14-Year-Old Who Shaped the Mac Calculator

2025-06-28

Chris Espinosa, a 14-year-old Apple employee, played a pivotal role in the Macintosh's development. Tasked with documenting Quickdraw, he built a calculator program. Steve Jobs initially disliked it, but Espinosa's innovative solution—a customizable 'Steve Jobs Roll Your Own Calculator Construction Set'—impressed Jobs and became the iconic Mac calculator for years, lasting until OS 9.

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