This chapter introduces organizational behavior and defines it as the study of how individuals, groups, and structure impact behavior within organizations. It discusses the importance of interpersonal skills in the workplace and identifies management functions as planning, organizing, leading, and controlling. The chapter also outlines the major behavioral science disciplines that contribute to OB, including psychology, sociology, anthropology, and explains that few absolutes apply due to situational factors. Finally, it discusses the three levels of analysis in OB - inputs, processes, and outcomes.