Does anyone know when electronic locks with PIN codes were invented?
You know the ones—they have a number pad and you type to correct code to unlock it. Approximately what year did they become "the norm" as well?
You know the ones—they have a number pad and you type to correct code to unlock it. Approximately what year did they become "the norm" as well?
or:You know the ones\u2014they have a number pad and you type to correct code to unlock it. Approximately what year did they become \"the norm\" as well?
or:The keypad was invented for the HP Electronic Slide Rule in 1972.
