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Line 13: Roman and Chinese [[abacus]]es [[George Stibitz\|Stibitz]] relay calculators at Bell Labs from [[Bell_Labs#Calculators\|Model II]] onwards [[FACOM 128]] relay calculators at [[Fujitsu]] [[IBM 650]] – seven bits :Two ''bi'' bits: 0 5 and five ''quinary'' bits: 0 1 2 3 4, with error checking.

Bi-quinary coded decimal: Difference between revisions