Customer relationship management is a branch of business management that focuses on organization's relationship and interaction with their customers and client base. It has developed as a management strategy in recent era. This book discusses the fundamental as well as modern approaches to different models of customer relationship management systems. The topics included in the book are the various types of customer relationship management systems, integrating marketing, sales and customer service aspects, etc. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in this book. It is a vital tool for all researching and studying this field.