As described by ASHRAE, “The intent of this publication, as part of the ongoing ASHRAE Datacom Series, is to provide the reader with detailed information on the design of datacom facilities that will aid in minimizing the life cycle cost to the client and to maximize energy efficiency in a facility.” In 2008, as a part of the ASHRAE Datacom Series, Technical Committee 9.9 published a book, “Best Practices for Datacom Facility Energy Efficiency.” TC 9.9 focuses on all aspects of data centers, technology spaces and electronic equipment/systems. Ultimately this resulted in practical, technically achievable and defendable energy efficiency solutions that would become part of the foundation for the development of future standards and codes. While developing strategies, different segments of the data center industry began to converge on similar approaches to reduce data center energy consumption. Many ideas, processes and designs were launched, resulting in recommendations still used. While it might be tempting to look back on the early years as a time of indecisiveness and conflicting priorities, I think it was very good that we went through this period.