This document discusses the importance of integrating applications to support e-business. It provides examples of how Amazon integrates its ordering, inventory, packing and shipping systems to efficiently fulfill customer orders. The document then discusses how integrating different application clusters is key to building a world-class enterprise. It outlines five stages of e-business design from cross-functional business units to inter-enterprise communities. Finally, it discusses key aspects of customer relationship management including using customer data to provide excellent service, implementing repeatable sales processes and creating loyalty through proactive solutions.