This document provides an overview of the evolution of management theories from the late 19th century to present. It discusses the classical theories including scientific management, bureaucratic management, and administrative management that emerged in the early 20th century focusing on efficiency. It then summarizes the neo-classical human relations movement and behavioral science approach. Finally, it outlines modern management theories including the quantitative approach, systems approach, contingency approach, and operational approach. The document is presented by different speakers and provides definitions and key contributors for each major stage in the development of management theories over time.