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Boosted by slightlyoff@toot.cafe ("Alex Russell"):
lcamtuf@infosec.exchange ("lcamtuf :verified: :verified: :verified:") wrote:

A slightly unhinged calculator fact: in the golden era of electronic calculators, some Japanese shopkeepers were reluctant to trust the newfangled tool, so Sharp made a line of combination calculator / abacus devices.

Here's a photo, next to some other stuff I own.