Quindar Tones: the beeps heard in recordings of astronauts in space
> if NASA wanted to send control signals like transmit on and off, they’d need to run a whole parallel set of wires, which would be expensive. So, they came up with a solution: use the same lines for control signals as well!It really seems that in earlier years, when resources were limited, people really used their ingenuity far better than today.Maybe I have rose tinted glasses, but the level of creativity and cleverness seen in old solutions to problems/challenges just blows my mind all the time.