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The Signals and systems helps to predict with some certainty,behaviour of some system when they are subjected to different input signals. It also helps to design electrical circuits or algorithms that will operate on signals to get the desired output.
In Electrical engineering programs, a class and field of study known as "signals and systems" is often seen as the "cut class" for EE careers, and is dreaded by some students as such. Depending on the school, undergraduate EE students generally take the class as juniors or seniors, normally depending on the number and level of previous linear algebra and differential equation classes they have taken.
