Abacuses detail aids rake-help slide rules abacus reason-rake-types mathematics reckons simply simply becomes obsolete manually
Abacuses detail aids rake-help slide rules abacus reason-rake-types mathematics reckons simply simply becomes obsolete manually learns rods balls education quietly life fact-reception abacuses detail simply reason-rake-types aids roll learns manually mathematics abacus rake-help slide rules fact-reception calculates education simply quietly life rods becomes obsolete
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Photo credit: © Wolfgang Weinhäupl / Alamy / Afripics
License: Licensed
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