The science and engineering of interacting surfaces in relative motion, including the study and application of the principles of friction, lubrication and wear, is called tribology. It is a highly interdisciplinary branch and draws on various fields such as physics, chemistry, materials science, mathematics, biology and engineering. Tribology focuses on the transport and manufacturing sectors, particularly on the design and effective lubrication of machine components. It also has applications in micro and nanotechnology, biology and medicine. Research areas in tribology range from the macro level to the nano level. It is broadly classified into classical tribology, biotribology, green tribology, geotribology, nanotribology, tribotronics, computational tribology, space tribology and open system tribology. The topics included in this book on tribology are of utmost significance and bound to provide incredible insights to readers. It elucidates new techniques and their applications in a multidisciplinary manner. This book is a vital tool for all researching or studying tribology as it gives incredible insights into emerging trends and concepts.