Types of Information Systems
The 'classic' view of Information systems found in the textbooks of the 1980s was of a pyramid of systems that reflected the hierarchy of the organization, usually transaction processing systems at the bottom of the pyramid, followed by management information systems, decision support systems and ending with executive information systems at the top. Although the pyramid model remains useful, since it was first formulated a number of new technologies have been developed and new categories of information systems have emerged, some of which no longer fit easily into the original pyramid model. the major role of the management of the plan.
Some examples of such systems are:
- data warehouses
- enterprise resource planning
- enterprise systems
- expert systems
- geographic information system
- global information system
- office automation.
Computer-Based Information System is essentially a system of information using computer technology to carry out some or all of its planned tasks. Below is a list of the basic components of computer based information system. The first four are known as information technology components: Hardware- these are the devices like the monitor, processor, printer and keyboard, all of which work together to accept, process, show data and information. Software- are the programs that allow the hardware to process the data. Databases- are the gathering of associated files or tables containing related data. Networks- are a connecting system that allows diverse computers to distribute resources. Procedures- are the commands for combining the components above to process information and produce the preferred output. In the end of all this, it is the people who are the ones using these hardware’s and software’s to interface with it and make use of its output. The first four components (hardware, software, database and network) that were discussed make up what is known as the information technology platform. Information technology workers could then use these components to create information systems that watch over safety measures, risk and the management of data. These actions are known as information technology services.
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