These are truly interdisciplinary proceedings: For the first time they gather on a large scale results of researchers dealing with clustering aspects in nuclear, atomic and molecular physics. Reaching far beyond purelyacademic interests this concept has become inreasingly important in the last few decades. As pointed out in the summary by Nobel prize winner B.R. Mottelson, acquaintance with the methods used in all the abovementioned fields is essential for a thorough study and understanding of the clustering phenomenon. Section headings: Clusters and Nuclei; Theoretical Approaches; Cluster Radioactivity and Fragmentation; Clustering in Light Nuclei; Atomic Clusters and Ions; Reactions and Clusters (Nuclear and Atomic); Nuclear vs. Atomic Clusters.