Information system has become as universal in our daily business activities as human resource management, marketing, finance or any other major business function. Information system plays a vital role in enabling management to control their data and run successful businesses. They are an important area of ​​study in business administration and management, and it is one of the most included business imperatives in an information systems course. If we want to understand the information system and its functions, we must first be sure of the concepts of a system. A good basis for understanding is to give a clear definition: information system is technically defined as a set of organized components that collect, store, distribute, process, transform information into approval, decision-making and control in an organization . The information system can also help managers and workers understand problems, analyze complex topics and prepare new products. Today, the fundamental goal of businesses is to be globally competitive using the capabilities of modern information systems and communication technologies. There are four types of information systems:1. An executive information system. Executive Information Systems (EIS) announces tools (software) that help transform organization data into useful summary reports and unite the functionality of management information systems and management support system. decision. These reports are typically used by senior management to quickly access strategic information from corporate and departmental levels, such as billing, cost accounting, planning, and more. The primary goal of EIS is to provide senior management with simple, direct access to information...... middle of paper ...... logical judgments applied to the knowledge base each time a user describes a situation to the expert system. Although expert systems can facilitate decision-making at all levels of an organization, non-managerial employees are the primary users who use them to make work-related decisions. Expert systems have also been successful in solving problems as diverse as diagnosing diseases, finding oil, and making soup. Characteristics: Expert systems are part of an exciting branch of computer science called artificial intelligence. Artificial intelligence (AI) is the application of human intelligence to computers. AI technology can detect your actions and, based on logical assumptions and previous experiences, will take appropriate action to complete the task. AI has various abilities including voice recognition, logical reasoning and creative responses..