The Running-In Process in Tribology is a collection of papers presented during the 8th Leeds-Lyon Symposium on Tribology held in the Institut National des Sciences Appliquées de Lyon, France in September 1981. The symposium was attended by 87 delegates from 13 countries, which showed a great level of interest on the scientific and industrial problems of running-in. Twenty eight papers are presented in the book, covering basic thermodynamics, mechanics of continuous solids, metallurgy, polymers, profilometry, and surface physics. Major topics such as elastohydrodynamics, roughness, and thermal effects in tribology are discussed as well. Mechanical engineers and materials scientists will find the book very insightful.