Abstract
In the drawer of furniture, there is no element indicates the thing which is oused inside.
The hypothesis that it was possible to assist the classification and the memory y adding the clue of the sense of sight, tactile, and aural to the drawer, and to improve the roblem of daily life such as the act of searching for the thing was constructed.
The daily classification and the sense of sight,touch, and hearing are performed by the experiment,and the hypothesis is proved by the difference.