Mechanical instruments are devices that use physical components to perform specific tasks or measurements. They often rely on gears, levers, and springs to function, making them essential in various fields such as engineering, music, and science. Examples include calipers, micrometers, and musical instruments like the piano. These instruments can be categorized into measuring tools and operational devices. Measuring tools, like rulers and thermometers, help quantify physical properties, while operational devices, such as watches and automobiles, perform tasks based on mechanical principles. Their design and functionality have evolved over time, enhancing precision and efficiency.