historical-nonfiction: Hewlett-Packard made the first scientific pocket calculator in 1972. Introducing…the HP-35! The calculator used three AA batteries, was over five inches long, and cost $395. That’s equivalent to $2,262 in 2016.

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historical-nonfiction: Hewlett-Packard made the first scientific pocket calculator in 1972. Introducing…the HP-35! The calculator used three AA batteries, was over five inches long, and cost 5. That’s equivalent to ,262 in 2016.

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