This document is a presentation by Ravindra Shinde on customer relationship management. It discusses the key concepts of internal and external customers, customer service, and the different types of external customers including loyal, impulse, discount, need-based, and wandering customers. Specific examples of Amazon's internal and external customers are provided. The document also outlines how to handle an angry customer by remaining calm, not taking it personally, actively listening, sympathizing, apologizing gracefully, finding a solution, and thanking the presenter for their guidance.