During the Cold War, Russians bugged typewriters to broadcast what was being typed: https://arstechnica.com/information-technology/2015/10/how-soviets-used-ibm-

During the Cold War, Russians bugged typewriters to broadcast what was being typed: https://arstechnica.com/information-technology/2015/10/how-soviets-used-ibm-selectric-keyloggers-to-spy-on-us-diplomats/ https://arstechnica.com/information-technology/2015/10/how-s...