ABS is a great example of a simple embedded system. Initial implementations were relatively self contained. Personally I'd be spun out in a ditch about 5 times

ABS is a great example of a simple embedded system. Initial implementations were relatively self contained. Personally I'd be spun out in a ditch about 5 times a day without traction control, I tried turning traction control off in my car once, and it turns out the way I drive is basically 100% dependent upon traction control functioning!