Artificial intelligence is the area of computer science concerned with designing intelligent computers system. It includes neural network fuzzy logic and probabilistic reasoning expert system cellular automata. Out of these technologies neural network fuzzy logic and probabilistic reasoning are predominantly known as soft computing. Just as crisp set theory has influenced symbolic logic fuzzy set theory has given rise to fuzzy logic. It is multi-value logic. Fuzzy logic has found extensive patronage in consumer products especially promoted by the Japanese companies and has found wise use in control system pattern recognition application and decision making.