Control systems involve the methods and mechanisms used to manage, regulate, and direct the behavior of other systems using feedback and control signals. They ensure that machines, processes, or devices perform as desired by comparing the actual output with a set target and making automatic adjustments. Control systems are broadly classified into open-loop systems, which operate without feedback, and closed-loop systems, which use feedback to correct errors. Key components include sensors (to measure output), controllers (to make decisions), and actuators (to execute corrections). They are widely applied in industrial automation, robotics, aerospace, manufacturing, power systems, and everyday appliances to improve efficiency, accuracy, stability, and safety.