This book covers the topic in Oscillation Theory of Differential Equations with "Maxima" in a broad sense and is written by the authors who are in this field for the past 30 years. It contains several criteria for the oscillation of various types of second order differential equations with "Maxima" reported in the literature in the last ten years sufficient number of examples provides in each chapter to illustrate the results. Its step by step expositions are easy to the readers to understand the results and findings on the oscillation theory of differential equations with "Maxima".