The device is a small computer, electronics can be installed on different parts of the human body in the implementation to make use of those facilities to simple equipment, and can take them anywhere.
Photonics hardware is a small computer that can be fitted with different parts. The human body has to work. To make use of those devices is easy. You can take it anywhere.
Electronic equipment is small computer can be equipped with various parts. The draft of the human being in use. To make use of equipment that is easy. And can carry out anywhere.