However, there is a good chance you will encounter expert systems, neural nets, and fuzzy logic techniques in your careers. Although we discuss neural nets and fuzzy logic as topics separate from ESs, ESs are now developed to incorporate two or more techniques. Genetic algorithms are relatively new in the realm of AI systems. This topic will probably be the most difficult for you to understand. Genetic algorithms are now incorporated into ESs.
Intelligent agents are really still in the early development stage.
They will serve us especially on the Internet. Web search engines are primitive intelligent agents. The factors are discussed in the section Factors Justifying the Acquisition of Expert Systems. The section Expert Systems in Action provides a practical glimpse at the contribution of these systems. You should realize that despite the sophistication of AI techniques, the systems have their limitations.