This document provides an overview of chapter 3 from the textbook "Management Information Systems". The chapter discusses how information systems can help organizations achieve competitive advantage. It introduces Porter's competitive forces model and the value chain model for understanding an organization's strategy. Information systems allow companies to pursue generic strategies like lowering costs, differentiation, focusing on niches, and strengthening customer intimacy. The chapter also examines how information technology impacts organizations by changing their structure, transaction costs, and relationships with the environment.