Unmanned Aerial Vehicles (UAVs). It is targeted towards a wider audience that includes, beginners who need an introduction to the subject; practicing specialist engineers who need to learn about other disciplines; and program managers, bureaucrats, planners, and policymakers who would like to get a holistic picture of the UAV technology. It provides an approach to the system engineering methodology for the initial sizing of a UAV. A very informative chapter on the lesson learned provides practicing engineers a glimpse of real-life problems. The book discusses several issues relating to the operation of UAVs. An exhaustive compilation of references is provided with every chapter to explore the depth when desired.