Breck Yunits
@breck
"The abacus, with its beads string on parallel wires, led the Arabs to positional numeration and the concept of zero many centuries before the rest of the world; and it was a useful tool - so useful that it still exists." I never made the connection as to how the abacus led to the invention of positional notation.
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Breck Yunits
@breck
From Vannevar Bush, As We May Think, 1945
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