A management information system (MIS) is a computer system that collects data from multiple online systems, analyzes the information, and reports data to aid in management decision-making. An MIS gathers data, stores it, and makes it accessible to managers who want to analyze the data by running reports. An MIS can improve an organization's operational efficiency, give an overall picture of the company, and act as a communication and planning tool by providing past, present, and predictive information to support decision making.