Central Processing Unit:
The central processing unit or CPU controls the operation of particular computer. In a computer the CPU is microprocessor. The CPU fetches binary-coded instructions through memory, decodes the instructions to a series of easy actions, and carries out these actions in a sequence of steps. The CPU also have an address counter or instruction pointer register, which store the address of the next instruction or data item to be fetched from memory; general-purpose registers, which are utilized for temporary storage of binary data; and circuitry, which produced the control bus signals.