Information system - SS1 ICT Lesson Note

An information system (IS) is a set of components that work together to collect, process, store, and disseminate data or information to support decision-making and other organizational activities. Information systems can vary in complexity and scope, ranging from simple manual systems to sophisticated computer-based systems. They are used in various contexts, including businesses, government agencies, healthcare, education, and more. Information systems encompass a wide range of technologies and processes used to collect, store, process, and disseminate information.  

Information systems typically consist of several key components:

1. Inputs: These are the raw data or information that is entered into the system. Inputs can come from various sources, such as users, sensors, databases, or external systems.
2. Processing: The processing component transforms the input data into useful information through various operations like sorting, filtering, analyzing, and summarizing.
3. Storage: Processed information is stored in databases, files, or other data repositories. This allows for easy retrieval and future analysis.
4. Output: The system generates outputs, which can include reports, charts, graphs, or any format that presents the processed information in a comprehensible manner.
5. Feedback: Information systems often provide feedback to users about the status or results of their interactions with the system.
6. Control: Control mechanisms ensure the accuracy, reliability, and security of the information and processes within the system.