1. An information storage medium comprising a card main body in which a module is embedded, the information storage medium being wherein the module comprises: storage means for storing first data comprising a data structure including identification information which identifies process target data, length information indicating data length of the process target data, and the process target data, second data succeeding the first data and comprising the same data structure as that of the data structure of the first data, and third data succeeding the second data and comprising the same data structure as that of the data structure of the first data; communication means for communicating with a medium processing device; and data processing means for accessing the process target data included in the second data on the basis of a first command received via the communication means, the first command specifying the identification information included in the second data and ordering processing of the process target data included in the second data, and subsequently the process target data included in the first data on the basis of a second command received via the communication means, the second command including a preceding data specification and ordering processing of the process target data.