Data mining has become the fastest growing topic of interest in business programs in the past decade. The massive growth in data generation, often called big data, in science (weather, ecology, biosciences, any scientific field), social studies (politics, health, many other fields), as well as business (real-time data in retail from cash registers, in supply chains from vendor to retail, financial to include banking, investment, and insurance, and less conventional areas such as human resource management). In response, many schools have created (or are creating) Masters programs in business analytics. This book is intended to first describe the benefits of data mining in business, describe the process and typical business applications, describe the workings of basic data mining tools, and demonstrate each with widely available free software. This book is designed for master's students. But that overlaps with business professionals as most new masters programs in business analytics are delivered on-line.