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amyjess
on Nov 21, 2016
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4-bit calculator made from cardboard and marbles
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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http://www.orionsarm.com/eg-article/47f1ab093f416