An Integrated Circuit (IC) is a small electronic device made up of multiple components, such as transistors, resistors, and capacitors, integrated onto a single piece of semiconductor material, usually silicon. ICs are used to perform a wide variety of functions in electronic devices, such as amplification, processing, and signal modulation. They are essential in modern electronics, found in everything from computers and smartphones to appliances and automobiles. ICs have revolutionized electronics by reducing size, cost, and power consumption, while improving performance and reliability.