This document discusses how information systems can help achieve various business objectives and strategies. It provides examples of how Walmart, Apple, Mandarin Oriental hotel, and others use IS for operational excellence, new products/business models, customer intimacy, improved decision making, competitive advantage, and survival. Continuous replenishment planning (CRP) systems are described, which allow efficient inventory management between suppliers and retailers like Walmart. Strategic information systems are introduced as those that change organizational goals, operations, or environment to gain competitive edge. Management challenges of implementing SIS are also outlined.