Systems theory has influenced and spawned theory and research development in organizational studies since the 1960s. Seeing a parallel between biological and human social systems, systems theory places dual emphases on organizations' relationships and interdependence among the components of the system as well as the organization–environment relationships. The structure and patterns and relationships of a system emerge from interactions among components, thus each system is unique. Systems have common defining properties, such as hierarchical ordering, coupling, permeability, holism, emergence, equifinality, and homeostasis. Representing the broader systems perspective are several specific theories and perspectives, such as Weick's theory of organizing, communication network perspectives, ecological and evolutionary perspectives, and self‐organizing systems theory. Systems theory has been extensively applied in research areas ranging from communication design and adoption of technology use in organizational operations to professional communication, health campaigns, and public relations.