Artificial Intelligence is the science and engineering of making intelligent machines, especially intelligent computer programs[1]. Artificial Intelligence is becoming a popular field in computer science as it has enhanced the human life in many areas. Study in the area of artificial intelligence has given rise to the rapidly growing technology known as expert system. Application areas of Artificial Intelligence is having a huge impact on various fields of life as expert system is widely used these days to solve the complex problems in various areas as science, engineering, business, medicine, weather forecasting[2]. The areas employing the technology of Artificial Intelligence have seen an increase in the quality and efficiency. This paper examines artificial intelligence, its definition and its application in various fields.

Keywords : Artificial Intelligence, Expert System, Technology of AI, Applications