Need ECu, ABS, Cruise Control, and stability control help

Sorry for posting this here. Anyway, i am doing a college presentation on cars and computers(the ECU). I need good information on how it helps control the car. I figured i would post here since you guys know ALOT about that topic(hopefully). I mainly need to know about the ECU, how is collect data to control ABS, cruise control, stability control and air/fuel ratio +emission. I got the basics down, but i need a little more explanation. Please help. Thank you very much.