This book deals with the basic concepts of signal and system theory and introduces the student to Fourier, Laplace, Z, and DFT transformations, as well as to the description of systems in state space, sampling theory, and computational issues in Fourier analysis. Without sacrificing rigor where necessary, the authors' effort has focused on presenting all the topics in a simple and understandable way, while each chapter is accompanied by a number of appropriately selected solved problems.