The document provides an overview of organizational behavior and key concepts in the field. It discusses how organizational behavior studies what people think, feel, and do in organizations. Organizations are defined as groups of people working interdependently toward common objectives. The document outlines reasons for studying organizational behavior, such as making sense of the workplace, influencing others to get work done, and improving financial performance. It also summarizes perspectives on organizational effectiveness including open systems perspective, high performance work practices, organizational learning, and stakeholder perspectives. Contemporary challenges for organizations discussed include effects of globalization, increasing workforce diversity, and changing employment relationships with virtual work and work-life balance issues.