A networking system is provided. The text and graphic separation method is used for separating texts and graphics of an image and comprises coarse classification and advanced classification. The bit line current which is sensed arises largely from only the current through the selected memory cell. During the determination of phone lengths, it is firstly attempted to determine the average phone lengths and standard variation of the average phone lengths by reference to the secondary statistic which is more language-specific. Even the commodities having no definite shape, which cannot be self-sustained in a vertical orientation, can be housed in the vertical orientation by being supported respectively by the commodity supporting members.