System stability refers to the ability of a system to maintain its performance and functionality over time, even when faced with external disturbances or internal changes. A stable system can return to its original state after experiencing fluctuations, ensuring consistent operation and reliability. This concept is crucial in various fields, including engineering, economics, and computer science. In engineering, for example, control systems are designed to achieve stability, allowing them to respond predictably to inputs. In software development, system stability ensures that applications run smoothly without crashes or errors, providing a better user experience.