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Information system

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An information system (IS) is a formal, sociotechnical, and organizational structure. It is designed to collect, process, store, and distribute information. This system is more than just a computer. It is a way for people and technology to work together. An IS integrates various components to manage data. These digital products help people make better decisions. They also help turn raw data into useful knowledge.

IS-Relationships-Chart
IS-Relationships-Chart

To understand how an IS works, we must look at its six essential components. First is hardware, which includes physical machinery like computers, monitors, and printers. Second is software, which consists of machine-readable instructions called programs. These programs tell the hardware how to process data. Third is data, which are the raw facts used by the system. Fourth is procedures, which are the policies governing how the system operates. Some say procedures are to people what software is to hardware. Fifth is people, who include users and those who maintain the system. Finally, the internet can act as a connecting component. Data acts as a bridge between hardware and people. Data only becomes true information when people involve themselves with it.

Information systems are often categorized by how they support an organization. Some systems support specific departments through functional area information systems (FAIS). Examples of FAIS include accounting, finance, marketing, and human resources systems. These pillars support larger business intelligence systems. Other systems are more specialized. For instance, expert systems attempt to duplicate the reasoning and expertise of human experts. Dashboards are another type, providing managers with rapid access to timely reports. There are also database management systems and learning management systems used in many fields.

In the 1980s, experts used a specific model to describe these systems. This was known as the pyramid model of information systems.

Four-Level-Pyramid-model
Four-Level-Pyramid-model

At the base of the pyramid were transaction processing systems. Above those were management information systems. The next level included decision support systems. At the very top were executive information systems. While this hierarchy is still useful, new technologies have changed the field. Modern categories like artificial intelligence and data warehouses do not always fit the pyramid perfectly.

Because these systems are so vital, companies have created special leadership roles. Many organizations have a Chief Information Officer (CIO) on their executive board. The CIO works alongside the CEO, CFO, and COO. Sometimes, the Chief Technical Officer (CTO) also serves as the CIO. There is also a Chief Information Security Officer (CISO). This person focuses specifically on information security management. These leaders ensure that the technology meets the needs of the entire enterprise.

Information technology (IT) plays a massive role in these systems. IT is designed to help humans perform tasks that the brain is not well suited for. This includes handling massive amounts of information at once. It also includes performing very complex calculations. IT can also control many simultaneous processes. These technologies are a malleable and important resource for executives. In many large organizations, the department responsible for these tasks is called "information services."

An information system is also considered a type of work system. In a work system, humans or machines use resources to produce products or services. An IS is a specific kind of work system devoted to capturing, storing, and displaying information. It acts as a form of communication and social memory. It can even be seen as a semi-formal language. This language supports human action and decision-making. By connecting people, processes, and IT, these systems help manage the complex world of modern business.

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File:Four-Level-Pyramid-model.png
Four-Level-Pyramid-model.png
File:IS-Relationships-Chart.jpg
IS-Relationships-Chart.jpg
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