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"Banks use a variety of information systems to process transactions such as deposits, ATM withdrawals, and loan payments. Most consumer transactions also involve information systems. When you check out at the supermarket, book a hotel room online, or download music over the internet, information systems record and track the transaction and transmit the data to the necessary places. Companies typically have several types of information systems, starting with systems to process transactions. Management support systems are dynamic systems that allow users to analyze data to make forecasts, identify business trends, and model business strategies. Office automation systems improve the flow of communication throughout the organization. Each type of information system serves a particular level of decision-making: operational, tactical, and strategic. Exhibit 13.6 shows the relationship between transaction processing and management support systems as well as the management levels they serve. Let’s take a more detailed look at how companies and managers use transaction processing and management support systems to manage information. Transaction Processing Systems A firm’s integrated information system starts with its transaction processing system (TPS) . The TPS receives raw data from internal and external sources and prepares these data for storage in a database similar to a microcomputer database but vastly larger. In fact, all the company’s key data are stored in a single huge database that becomes the company’s central information resource. As noted earlier, the database management system tracks the data and allows users to query the database for the information they need. Chapter 13 Using Technology to Manage Information 515"