The document discusses several theories of organization:
1. Classical theory viewed organizations as machines and workers as cogs, with the goal of efficiency. Neoclassical theory emphasized good human relations and social factors.
2. Bureaucratic theory examines organizations as systems of rules and authority. Weber's theory of bureaucracy defined its key features.
3. Systems theory views organizations as complex systems of interrelated elements and environments. Changes in one element impact others.
4. Contingency theory posits that the best organization structure depends on external factors like environment, strategy, and technology. Different structures suit different situations.