This comprehensive set of notes on Organizational Behaviour (OB) covers the essential aspects of how individuals, groups, and organizations interact. The first unit introduces the meaning, features, and scope of OB, diving into the basic assumptions and its relation to strategic and international perspectives. In Unit 2, we explore individual behaviour, perception, learning theories like classical and operant conditioning, and how personality plays a role in workplace dynamics. Unit 3 focuses on group dynamics, discussing group behaviour, norms, cohesiveness, and teamwork. Unit 4 delves into motivation and leadership theories, such as Maslow's and Herzberg's, while also covering financial and non-financial motivation methods. The final unit examines stress management, conflict resolution, and organizational development, offering practical solutions to managing workplace stress. Each unit is designed to provide an in-depth understanding, with clear explanations, real-life applications, and thought-provoking assignments that encourage deeper analysis.