This document provides information about various management theories and approaches including:
1. The Classical Approach including Bureaucratic Management Theory by Max Weber and Scientific Management concepts by F.W. Taylor from 1910.
2. The Neo-Classical Approach including the Human Relations movement led by Elton Mayo and behavioural science concepts from A. Maslow and Douglas McGregor in the 1940s.
3. The Modern Approach including System Approach proposed by Boulding and Johnson in the 1950s, and Contingency Approach developed by theorists like Lorsch and Lawrence.