Motherboard

The main item inside the system box is called a motherboard and houses a variety of components, including the all-important chips. Computer chips are made up of millions of tiny components called transistors, which act as electronic switches. The main chip, the Central Processing Unit (CPU), is responsible for the processing and control of data. It is often referred to as the brain of the computer

All these components are connected on the motherboard by bus lines, forming electrical paths between them.