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A comment on 4-bit calculator made from cardboard and marbles. Parent comment

Re:4-bit calculator made from cardboard and marbles by amyjess on Monday November 21, 2016 @05:37PM (#13009890)
Aside from the xkcd example, there's also the Machina Babbagenseii from Orion's Arm: sophont robots (vecs in OA-speak) made of walking Analytical Engines.

http://www.orionsarm.com/eg-article/47f1ab093f416

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