1. Introduction 1.1 Soft Computing 1.1.1 Fuzzy Logic 1.1.2 Neural Networks 1.1.3 Probabilistic Reasoning 2. Fuzzy Logic Systems . 2.1 Basic Concepts 2.1.1 Set-Theoretical Operations and Basic Definitions 2.1.2 Fuzzy Relations . 2.1.3 The Extension Principle . 2.1.4 Approximate Reasoning....