The science and engineering of interacting surfaces in relative motion is referred to as tribology. The field focuses on the study and application of concepts of friction, wear and lubrication. The force that resists the rolling and sliding of one solid object over another is known as friction. Wear refers to the damage and gradual removal and deformation of materials from solid surfaces. Its causes can be chemical and mechanical. Lubrication is the process and the technique of using lubricants to reduce wear and tear, and friction between two surfaces. Primary branches of this discipline include classical tribology, biotribology, green tribology, geotribology, nanotribology and tribotronics. Other important branches are computational tribology, open system tribology and space tribology. This book is a compilation of chapters that discuss the most vital concepts in this field. Most of the topics introduced herein cover new techniques and applications of tribology. Those in search of information to further their knowledge will be greatly assisted by this book.