"Embedded systems" is probably the space where this happens the most and it's a super super broad category. Everything with a microcontroller in it is running

"Embedded systems" is probably the space where this happens the most and it's a super super broad category. Everything with a microcontroller in it is running someone's code. For example, a quick google search of "how many microcontrollers in a car?" gives 50 as a common answer. For every system that people think about as a computer (entertainment, engine controller, airbags) there are another 10 systems that are also tiny computers that we kind of expect to mostly work together just about perfectly, forever. Feels pretty obscure and somewhat important, but maybe not incredibly obscure and really important. :/