Abstract: A transmitting terminal can transmit a content held by itself to a specific receiving terminal having no email software as if using a mailer. The transmitting terminal (10) and the receiving terminal (20) are connected to a delivery server (30) via a network (4). The delivery server (30) comprises: a database (36) for registering the device ID that specifies the receiving terminal (20); a content storage (39) for temporarily storing a content transmitted from the transmitting terminal (10); and table (33, 37) for managing contents separately on a per device ID basis of the receiving terminal. The delivery server (30), when receiving a request from the receiving terminal (20), refers to the tables (33, 27) and transmits to the receiving terminal (20) a content, the transmission destination of which corresponds to the device ID of the receiving terminal (20).

Abstract: A data transmission device includes a memory for storing a plurality of data consisting of a plurality of sorting areas. The device selectively transmits the data of the sorting area including a desired data in response to a predetermined command signal. Data of the sorting areas including data not desired may not be sent. A central processing unit is connected to each of the electronic cash registers through one or more communication lines and when the electronic cash register receives a command signal sent from the central processing unit, the electronic cash register acts according to the command signal to send specific data.

Abstract: A data processing device consists of a first memory and a plurality of second memories. When transferring data to the first memory from the plurality of second memories having transfer orders of the data predetermined with respect to each other, the data can be maintained in each of the second memories until the transfer of all the data stored in the second memories is completed. Therefore, even in the case where the data stored in the second memories cannot be correctly transferred to the first memory due to an occurrence of an error, the data maintained in the second memories can be saved.