Biological systems are characterized by network interactions among components. This is true with gene transcription, protein-protein interactions, cellular interactions, whole body interactions, and at the level of populations of individuals. This mini-symposium presentations research on biological networks that covers the whole range from genes to social networks. There will be discussion of a new approach to clustering of gene transcription data, discussions of network dynamics in electrically-active pancreatic beta-cells and neurons, and of collective behavior in decision making. The overall goal of the mini-symposium is to illustrate the use of network approaches to the study of biological networks.