After presenting several useful strategies and algorithms for DF and tracking performance, the book evaluates DF algorithms, software, and systems. It next covers fuzzy logic, fuzzy sets and their properties, fuzzy logic operators, fuzzy propositions/rule-based systems, an inference engine, and defuzzification methods. Elucidates data fusion strategies, algorithms, and performance evaluation mainly for aerospace applications. However, the concepts and methods discussed are equally applicable to other systems.