The scope of Fuzzy Systems is now being expanded as it is now being incorporated in different scientific researches. This book contains researches concerning the theory and applications of fuzzy subsets and systems. This book on fuzzy systems is a collective contribution of a highly advanced group of international authors. Different approaches, evaluations, methodologies and advanced studies on fuzzy systems have been included in this book. The numerous applications of fuzzy systems in different areas of science such as medical science and environmental science have also been included in this book.