Abstract: A terminal-side communications control unit 41 makes a request to a server for retrieving an instruction file that describes an instruction for transmitting transmission data. The server transmits the instruction file in response to the request for retrieving the instruction file. On receiving the instruction file, the terminal-side communications control unit 41 causes an application executing unit 42 to execute an application, and also forwards the instruction file to a transmission data generating unit 44. On receiving the instruction file, the transmission data generating part 44 refers to the instruction file to generate, from generated data stored in a generated data storage unit 43, transmission data to be transmitted to the server.

Abstract: An information terminal device 10 is connected to a server 1 storing instruction data 200. For the received instruction data 200, a determining unit 104 determines the corresponding application. An analyzing unit 105 analyzes the instruction data 200. An operation control unit 106 extracts message data from the instruction data 200. An application executing unit 107 operates based on the instruction data and the above application. A display unit 19 displays a message represented by the message data on a screen based on the execution of the application. With an execution checking unit further provided, it is possible to determine whether the application is to be executed based on the message data.