Abstract: The present invention is directed to a mail-order shopping system which allows a user to do electronic mail-order shopping by a simple operation without using a personal computer and to correctly acquire information of goods. An adapter including both a memory for registering user's information specifying a user and a modem for communicating with a mail-order firm, is connected to the DVD reproduction apparatus. The catalog information, recognition information of the mail-order firm, and communication programs representing a procedure for communication from the user to the mail-order firm, which are stored in a DVD for mail-order shopping, are reproduced by the DVD reproduction apparatus. The catalog information is displayed on a TV display, and both information of desired goods selected by the user and user's information registered in the memory of the adapter, are transmitted through a modem on the basis of the reproduced communication programs.