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"A management information system consists of a transaction processing system, management support systems, and an office automation system. The transaction processing system collects and organizes operational data on the firm’s activities. Management support systems help managers make better decisions. They include an information-reporting system that provides information based on the data collected by the TPS to the managers who need it; decision support systems that use models to assist in answering “what if” types of questions; and expert systems that give managers advice similar to what they would get from a human consultant. Executive information systems are customized to the needs of top management. An information system that handles the daily business operations of a firm. The system receives and organizes raw data from internal and external sources for storage in a database using either batch or online processing. A method of updating a database in which data are processed as they become available."