On demand tracking of applications is provided by a mechanism of the present invention. The data processing method includes receiving first bit data from the nonvolatile memory at a memory controller, and performing erasure decoding based on the first bit data and second bit data stored in the memory controller. The document is distributed to a user who presents the document at the point of encashmentpresentment and provides the personal document control number. A value axis is provided that relates the value of the goods from each market to each other.