3 ms·Nanoscale 'abacus' uses pulses of light instead of wooden beads for calculations29 points by sizzle 9y agotmzt 9y agoCould this be generalized to a finite Turing machine, using the beads as a type of tape with marks? Would this be competitive with a register file based design for implementing an ALU.vorotato 9y agoFor the first part the jury is out, and for the second they seem to think so.