A closed loop system is a control mechanism that uses feedback to maintain a desired output. In this system, the output is continuously monitored and compared to a set point. If there is a difference, the system makes adjustments to minimize the error, ensuring stability and accuracy. Common examples include thermostats in heating systems and automated manufacturing processes. These systems are often contrasted with open loop systems, which do not use feedback to adjust their operation. Closed loop systems are widely used in various fields, including engineering, robotics, and biomedical applications, due to their ability to adapt and improve performance over time.