This Wearable Abacus Is Basically the World’s Oldest Smart Ring

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Smart rings may seem like something from an impossible (or at least highly unlikely ) vision of the future, but surprisingly enough, tech you can wrap around your little finger isn’t anything new. Just take this itty-bitty abacus from the 17th century as proof. Read more…        

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This Wearable Abacus Is Basically the World’s Oldest Smart Ring

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