In the course of the 1970s, handheld electronic calculators transformed the way tens of millions of people did arithmetic. Engineers abandoned slide rules, business people gave up desktop calculating ...

Editor's note: Our good friend Max is looking for any suggestions for electronic calculators and solvers. Nothing's too great or too small. Let him know which you think might be worth including in ...

It’s possible quite a few of our older readers will remember the period from the 1960s into the ’70s when an electronic calculator was the cutting edge of consumer-grade digital technology.

The calculator’s “C” button—the one that clears input—was gone. The “C” itself had been cleared. The “C” button’s function is vestigial. Back when calculators were commercialized, starting in the ...