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

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

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.

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