Razieh ArabChadegani - Health & Medical Science Department, Engineering Research Institute of Disaster Management; Shakhes Pajouh,
Zahra ArabChadegani - CinnaGen CO, Address, Karaj and ۳۱۶۵۹۳۳۱۵۵, Iran
Seyyed Mostafa Mostafavinia - Aerospace Organization, Address, Karaj and ۱۳۷۹۶۱۸۷۶۱, Iran

So far, there's been many discussions concerning knowledge representation; but it hasn't been discussed enough on how we use it for solving real problems. Expert Systems are computer programs which simulate a specialist's thinking in a specific field. These softwares have logical pattern that a specialist makes decision based on them. Expert System is one of branches of artificial intelligence which tries to provide specialty services beside specialists, by collecting specialty knowledge and expert information in a specific field. In this article, we will introduce Expert Systems and discuss their usages, decreasing method and how to use them.

Expert System, Management, Knowledge Representation, Artificial Intelligence