ControlDraw.co.uk
Title
ControlDraw - Homepage
Description
The principle is simple - if you can measure something in a process and also do something that affects that process in a predictable way then keep checking it and do whatever you can to improve it. If you know how your actions affect the process then you may be able to calculate what actions to take. It's called Feedback.
There are many applications of control systems - probably more than you realise. You are full of control loops yourself - biological control loops
The control systems this site deals with are those related to engineering systems in manufacturing plants - we call it process control.