Summary 237 SUMMARY Network systems are special-purpose embedded computing systems with low power requirements. This chapter surveyed the main techniques that have been developed to date for use in low power network systems. Considering the direction of research and development in the field, we presented the main techniques for low power lookup engines and low power network processors. In the case of lookup engines, we focused on IP lookup systems, examining all proposed memory architectures, including tri-state CAMs and SRAM-based designs.