https://makezine.com/article/maker-news/reproduction-of-early-mechanical-computer-the-digi-comp-ii/
Reproduction of Early Mechanical Computer: The Digi Comp II - Make:
Apr 14, 2015 - The Digi Comp II is a replica of a binary mechanical computer that can perform basic mathematical functions. As shown by Windell Oskay at Maker Faire Bay Area...
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