The primary purpose of this book is to prepare energy managers to understand the basic concepts and principles of Information Technology (IT) so they can sucessfully apply this information to their facility and have the knowledge to supervise the IT work of a consultant or a vendor. This book will provide the necessary information for the energy manager to successfully purchase, install and operate complex, Web-based energy information and control systems. Filled with comprehensive information, this book will address the most significant concepts and principles that the typical energy or facility manager might need with emphasis on computer networking, use of facility operation databases, and sharing data using the Web and the TCP/IP communications protocol.