This paper is designed as a primer for college level STEM students about to take their first formal class in feedback control systems. This means that the explanations assume the reader has had some necessary math, science, and programming classes. With that in mind, this document aims to provide not only an overview of what the student will see in learning about control, but context for why those methods are used and why the whole field is important. Even for the scientist or engineer who has long ago finished college or turned in that doctoral thesis, this basic context for the field of feedback systems can provide some useful understanding.