> Above the fold The entirety of the "fold" on my screen is an absurdly giant and seemingly irrelevant image, overlaid with the text "Tune your PID", "It has n

> Above the fold The entirety of the "fold" on my screen is an absurdly giant and seemingly irrelevant image, overlaid with the text "Tune your PID", "It has never been easier", and two buttons. As I scroll down, the next thing my eyes catch is some mathematical nonsense, which tells me exactly nothing other than that this is a complex thing that is surely entirely over my head. To people that know what a "PID controller" is, it's probably informative. I came in assuming that there was some sort of controller for OS program PIDs and was unable to grasp the context at all.