This document provides an overview of the history, present, and future of customer relationship management (CRM). It discusses how CRM has evolved from mass marketing in the 1960s to focus more on customer segmentation, customization, niche marketing, and relationship building. The present involves promotion campaigns, feedback services, and CRM software. The future of CRM is focused on increased retention, sales, and reducing costs through technology that provides more customer information and individualized experiences. Overall, the document traces the development of CRM and its increasing importance in understanding and interacting with customers.