Organizational Behaviour (OB) is the study and application of knowledge about how people, individuals, and groups act in organizations. It does this by taking a system approach. That is, it interprets people-organization relationships in terms of the whole person, whole group, whole organization, and whole social system. Its purpose is to build better relationships by achieving human objectives, organizational objectives, and social objectives. Organizational behaviour encompasses a wide range of topics, such as human behaviour, change, leadership, teams, etc. Since many of these topics are covered in general management books, this book focuses on a few parts of OB: elements, models, social systems, OD, work life, action learning, and change. This book contains the fundamental and basic information on the subject and the selection of contents makes it an appropriate book for the students.