Is a program that acts as an intermediary between the hardware (Hardware) and the software application to handle information from other users, it will serve as a control display. Operation of the hardware.
Is a program that acts as an interface between the hardware (Hardware) with application software, which is responsible for receiving data from another user. It is used to control the display. Performance of the hardware
Is a program that serves as a central connection between hardware (Hardware) with the general application software which serves traffic from the user again. By controlling the display function of the hardware.