This chapter is on Laplace transforms. The use of Laplace transforms is widespread in the field of circuit analysis. We can apply the unilateral Lateral transforms to obtain the solution of linear differential equations. It is also possible to obtain the transform equivalent of the elements used in a circuit, and then we can find out the response of the system to different input signals, without having to form the differential equation. The page on Laplace transforms describes the mathematical aspects of the Laplace transform. Its application to circuits is presented in the chapters to follow.