A safety interlock is a device designed to prevent machinery or equipment from operating under unsafe conditions. It ensures that certain safety measures are in place before allowing the machine to function. For example, in a microwave oven, the interlock prevents the appliance from running if the door is open, protecting users from exposure to harmful radiation. These interlocks can be found in various settings, including industrial machines, automobiles, and home appliances. They are crucial for maintaining safety standards and reducing the risk of accidents, ensuring that users can operate equipment without fear of injury or malfunction.