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.
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.