This document provides an overview of several classic management theories: Frederick Taylor's Theory of Scientific Management focused on improving efficiency through time and motion studies and paying workers based on productivity. Henri Fayol proposed 14 principles of management including division of work and unity of command. Max Weber distinguished authority from power and described bureaucracy as having division of labor, rules, and impersonal relationships. Elton Mayo found that the Hawthorne Effect led to increased productivity when workers felt important through novel changes even if minor.