The document summarizes the major schools of management thought that have developed over time to study management from different perspectives. It discusses six schools: [1] Classical school (scientific management, administrative management, bureaucratic management) focused on efficiently managing workers and organizations; [2] Behavioral school (human relations, behavioral science) focused on understanding human behavior in organizations; [3] Quantitative school (management science, operations management, management information systems) focused on improving decision-making through quantitative models; [4] Systems school focused on organizations as open systems transforming inputs to outputs; and [5] Contingency school focused on applying management principles based on each unique situation. Each school made important contributions to furthering the systematic study of