This document discusses classical and modern organizational theories. It focuses on three classical theories: scientific management by Taylor which emphasized efficiency through planning, standardization, and specialization; Weber's bureaucratic approach which emphasized hierarchy, specialization, rules, and impartiality; and Fayol's administrative theory which included principles of management, the line and staff concept, and functions of management. It then provides details on Taylor's four principles of scientific management and Weber's principles of bureaucracy. Finally, it lists and briefly explains Fayol's 14 principles of management.