The aim of this book is to provide self-learning aids on electromagnetic theory and an introduction on computational electrodynamics. Nor, of course, is it intended to present a self-sufficient treaty on this subject. Therefore, a prior knowledge of the notions of differential and integral calculus should be accompanied in parallel to the systematic development of beginning students. Following this proposition, Maxwell's equations are solved in frequency-domain and in time-domain, through computational techniques. Thus, this material is aimed for both students starting an undergraduate degree in Engineering or Physics as well as those who are in more advanced studies on electromagnetic theory.