Human vision based pre-processing for MPEG video compression uses light intensity. In some embodiments, a system comprises sorting stations, each of which houses a number of disposable containers. Therefore, the distributed storage of a Forwarding Information Base is automated, massive manual configuration work is avoided, and the problem of oversized FIB of the router as a result of fast growth of the routing table is solved. Fastener receiving holes through the ears are configured to receive fasteners that are inwardly inclined toward the box central longitudinal axis.