information system: Quick Facts

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Facts

Also Known As	information storage system • information storage and retrieval system • information retrieval system

Photos

taking a driver's license test on a computer

A three-layered pyramid diagram showing the structure of organizational information systems: the base layer is operational support (supply chain management, customer relationship management, transaction processing systems), the middle layer is support of knowledge work (professional support systems, collaboration systems, knowledge management systems), and the top layer is management support (management reporting systems, decision support systems, executive information systems).

A circular flowchart illustrates the organizational information systems life cycle, with labeled arrows showing stages: feasibility study, system analysis, system design, programming and testing, installation, operation and maintenance, termination, and upgrade.

A three-column diagram outlines steps for securing information systems: identifying threats such as crime, human error, disasters, and failures; establishing general and application controls; and performing financial and operational audits.

Structure of an information system

Figure 6: The life cycle of an information system.

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