This volume contains the contributions by some of the participants of the International Meeting on $K$-Theory which was held from June 29 th to July 3rd 1992 at the Institut de Recherche Mathématique Avancée, Strasbourg. This conference was the first held under the auspices of the project “$K$-Theory” of the European Community. $K$-Theory is an extremely rich subject which touches on questions in topology, geometry, algebra and arithmetic. The present volume reflects this diversity.