George Klir Quote

What is systems science? This question, which I have been asked on countless occasions, can basically be answered either in terms of activities associated with systems science or in terms of the domain of its inquiry. The most natural answers to the question are, almost inevitably, the following definitions: Systems science is what systems scientists do when they claim they do science. Systems science is that field of scientific inquiry whose objects of study are systems.

Facets of Systems Science, (2001)