This document discusses the systems theory of management. It defines a system as a collection of interrelated parts working together to achieve goals. A management system includes inputs, transformation processes, outputs, feedback, and the environment. It views an organization as made up of subsystems that work together holistically and synergistically. The systems approach helps study complex organizations and identify interrelations between functions. However, it is abstract and does not provide specific tools for managers. Primary contributors to systems theory include Bernard, Simon, von Bertalanffy.