This book intends to fill the gap in the literature of mobile robots by containing, in a single reference, complete graphically presented infor- mation on the mechanics of a mobile robot. It is written in laymen’s lan- guage and filled with sketches so novices and those not trained in mechanical engineering can acquire some understanding of this interest- ing field. It also includes clever schemes and mechanisms that mid-level mechanical engineers should find new and useful. Since mobile robots are being called on to perform more and more complex and practical tasks, and many are now carrying one or even two manipulators, this book has a section on manipulators.