A bus is a central set of highly specialized electrical sockets within a computer into which are plugged the CPU, memory, expansion cards, and peripherals. Without a bus, a computer would need separate wires between all components to connect them together. Accordingly, a bus allows a computer to operate more efficiently and simply.
The central processing unit (CPU) is the primary component of a computer that performs most of the processing inside the computer. It executes instructions from programs by performing basic arithmetic, logic, control, and input/output (I/O) operations.
A microprocessor is an integrated circuit that houses the entire central processing unit (CPU) of a computer on a single chip, requiring only memory and input-output devices to complete the system.
