This study aims to investigate the function of information systems within businesses. First, an explanation of the significance of information systems in modern businesses is given. Then, every one of these methods for evaluating information systems, including TPS, MIS, DSS, ES, WGSS, and the OAS, is assessed from a distinct angle. Each of these approaches has a designated place in the organizational hierarchy. Finding the commonalities and differences between management information systems and decision support systems was a primary goal of this study. The following are the most significant findings: 1. The decision support system operates in real time, while the management information system operates online. 2. While the decision support system can handle enormous volumes of data, the management support system can only handle medium levels of data. 3. While the decision support system makes extensive use of graphics, the management support system makes less use of them. 4-While decision support systems concentrate on both structured and semi-structured data, management information systems solely concentrate on completely organized tasks or routines for decision-making.