The knowledge of a "system" in which different fields converge, with no apparent linkage, is a knowledge that goes beyond the conventional scope of the term. The purpose of this book is to provide a multi-faceted approach combining epistemology, theory, methodology, technical and practical contributions, by using systems theory as a reference. Indeed, systems theory itself was conceived as a need to find a theory able to unify diverse subjects through an interdisciplinary knowledge, thus to create a map of knowledge. What will finally emerge is that systemic knowledge can successfully embody a new, thorough way to analyse and understand reality.