This document discusses various types of biological networks including transcriptional factor binding networks, protein-protein interaction networks, metabolic networks, and genetic interaction networks. It provides examples of large-scale networks that have been mapped in yeast, sea urchin, human, and other organisms. It also discusses properties of biological networks like degree distribution, assortativity, essentiality of hub and bottleneck nodes, error tolerance, and date vs party hubs. Network randomization and motif finding are presented as methods to analyze biological networks.