Frederick Taylor - known for scientific management, which emphasized efficiency, standardization of work processes, and systematic selection and training of employees.
Henri Fayol - introduced the 14 principles of management, including division of work, unity of command, and esprit de corps, which laid the foundation for modern management principles.
Peter Drucker - a pioneer in modern management theory, known for his work on management by objectives, the concept of the knowledge worker, and the importance of innovation and entrepreneurship in organizations.