How the Curta Calculator, Intended as a Gift For Hitler, Kept its Inventor Alive During WWII
Before the arrival of the microchip in the 1970s, we didn’t have the luxury of the portable electronic calculator -- we were limited to desktop models than ran off electric current. But it wasn’t actually a problem that needed solving, as if you wanted to carry a calculator in your pocket and do complicated arithmetic on the fly, you could just use a Curta.
