This document discusses clusters and cluster management. It begins by defining clusters as geographic concentrations of interconnected businesses and institutions in a particular field. It notes clusters are related through buyer-supplier relationships, common technologies, and distribution channels. Clusters provide a learning environment and have close geographic proximity. The document discusses critical dimensions of clusters, why their development is important for policymakers, how government can support cluster development through various policies and programs, and challenges facing clusters from globalization and other factors. It also examines networks within clusters and different models of internationalization for clusters.