Connector according to the classification there are three basic types namely, wire to wire, wire to Board, Board to Board. These three types of interface methods are not worlds apart. Two reasons can explain this type of overlap. Primary, with a connection device of design programme just through in convergence method Shang slightly for change Hou again from scratch definition, that became can applies Yu another a type convergence method of new of design programme; second, a article line cable in installation Shi can Yu its end loaded online on line connection device and Yu another end loaded online on board connection device, for example: I/O connection device 5 level commodity of shape is course most common of like. If such ambiguities and not on the type of cohesion, the cohesive supply connector useful according to classification.