This document provides an analysis of demand side management (DSM) technologies. It begins with an introduction to DSM and an overview of energy consumption management and advanced interface technologies like AMI and FAN. It then presents the structure of DSM, showing how AMI connects smart meters, service providers, and energy management systems at the consumer level. The document concludes with an overview of the California PUC adopting new rules to ensure consumers can access energy usage data from smart meters.