A "system" is a set of interconnected components that work together to achieve a specific goal or function. These components can be physical, like machines or devices, or abstract, like processes or ideas. Systems can be found in various fields, including biology, engineering, and social sciences, and they often interact with their environment. In a system, each part plays a role in the overall operation. For example, in a biological system, organs work together to maintain health, while in a computer system, hardware and software collaborate to perform tasks. Understanding how systems function helps in analyzing and improving their efficiency.