Atomic clusters are the bridge between molecules and the bulk matter. Following two key experiments ? the observation of electronic shells in metallic clusters and the discovery of the C60 fullerence ? the field of atomic clusters has experienced a rapid growth, and is now considered a mature field. The electrons of the cluster are confined to a small volume, hence, quantum effects are manifested on many properties of the clusters. Another interesting feature is that the properties often change in a non-smooth way as the number of atoms in the cluster increases. This book provides an updated...