This document provides an overview of organizational behaviour. It defines organizational behaviour as the study of human behavior in organizations. The document outlines several key aspects of organizational behaviour including its nature and scope as an interdisciplinary field, various approaches to studying it, and importance. It also summarizes findings from seminal studies on organizational behaviour like the Hawthorne studies from the 1920s-1930s which explored how variables like lighting, work hours, and breaks impacted productivity. The document is intended as a teaching aid to introduce students to the topic of organizational behaviour.