Scales are devices that are used to measure weight or mass. There are different types of scales designed for different purposes and applications. The most common types of scales are: Mechanical scales: these scales use a spring, beam scale, or weighing pan to measure weight. They are often easy to use and do not require a power supply, but may not be as accurate as electronic scales. Electronic scales: these scales use sensors and electronic circuitry to measure and display weight. They are often more accurate than mechanical scales and may also offer other features such as tare functions, automatic zeroing and data logging. Analytical scales: these scales are highly accurate and are used in science, medicine and industry to measure small weights with high accuracy. Platform scales: these scales have a large platform used for measuring heavy objects. They are often used in industry and shipping. Hand scales: these scales are portable and are often used for weighing luggage, food or small items. Scales are used in many industries and applications, including industrial, commercial, scientific and medical.