Abstract: An information communication system includes a server device and information communication terminals connected by a network, in which the server device provides data communication services according to requests from the information communication terminals. The server device stores information relating to users of the information communication terminals including the identification information thereof, and provides advertisement information to the information communication terminals via the network, this advertisement information corresponds with the information relating to the user of the requesting party stored in server, according to requests from the information communication terminal including the identification information of the user. The information communication terminal generates and sends requests to be sent to the server device, including user identification information, and obtains the advertisement information from the server device and outputs this obtained advertisement information.

Abstract: A cassette adapter has a cassette which is inserted into a cassette insertion portion of a signal playback device. The cassette is provided with an operation state detection means and a control signal output means. An acoustic device is controlled corresponding to an operation state on the basis of the signal detected with the control signal output means, thereby controlling the operation of the acoustic device in synchronization with the playback device.