In 1975 year were chips used inside the computer for the first time
Computer chip, also called chip, integrated circuit or small wafer of semiconductor material embedded with integrated circuitry. Chips comprise the processing and memory units of the modern digital computer (see microprocessor; RAM).
Computer chips are made of silicon, which is a semiconductor, andm in order to make the most efficient use of it, chip manufacturers use sand that contains as much silicon as possible. The mineral quartz is ideal for this purpose because its two main components are silicon and oxygen.