Device means equipment. A device made with a digital circuit is called a digital device. Digital logic gates are built according to Boolean algebra rules. Digital circuits are made with different digital logic gates. And with this digital circuit various electronic devices are made. These devices are called digital devices. Digital devices include all kinds of electronic devices , including computer equipment , mobile phones , digital cameras and multimedia projectors. An electronic device that stores information and displays it as a digital file is called a digital device. Such as- encoder , decoder , adder , register etc.