@starsandrobots have 2 of them. even better way than slide rules to make math tactile
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@argonblue neat! Have you ever disassembled one? Do you use them for calculations? What else is in the tactile math machine category? -
@starsandrobots other tactile math machines: abacus (maybe more of a mnemonic?), planimeter (haven't used 1 yet), E6B (flight computer)... -
@argonblue E6B a.k.a. the "Whiz Wheel" — more great names, and really cool :)
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