Systems-Theory

http://en.wikipedia.org/wiki/Category:Systems_theory

Biological systems: http://en.wikipedia.org/wiki/Biological_system

Social systems: http://en.wikipedia.org/wiki/Social_structure

Niklas Luhmann: http://en.wikipedia.org/wiki/Niklas_Luhmann

Systems and systems science
Systems categories	Conceptual systems · Physical systems · Social systems · Systems theory · Systems science · Systems scientists
Systems	Biological system · Complex system · Complex adaptive system · Conceptual system · Cultural system · Dynamical system · Economic system · Ecosystem · Formal system · Global Positioning System · Human anatomy · Information systems · Legal systems of the world · Living systems · Systems of measurement · Metric system · Multi-agent system · Nervous system · Nonlinearity · Operating system · Physical system · Political system · Sensory system · Social structure · Solar System · Systems art
Theoretical fields	Chaos theory · Complex systems · Control theory · Cybernetics · Scientific holism · Sociotechnical systems theory · Systems biology · System dynamics · Systems ecology · Systems engineering · Systems psychology · Systems science · Systems theory
Systems scientists	Russell L. Ackoff · William Ross Ashby · Gregory Bateson · Stafford Beer · Ludwig von Bertalanffy · Kenneth E. Boulding · Peter Checkland · C. West Churchman · Heinz von Foerster · Charles François · Jay Wright Forrester · Ralph W. Gerard · Debora Hammond · George Klir · Niklas Luhmann · Humberto Maturana · Donella Meadows · Mihajlo D. Mesarovic · Howard T. Odum · Talcott Parsons · Ilya Prigogine · Anatol Rapoport · Francisco Varela · John N. Warfield · Norbert Wiener