Disclosed are a data transmission method and a data restoration method. The system includes a processor driven controller unit programmed to control a selected device in dependence on generally contemporaneous aural and optical signals. The method also includes removing a thickness of the first, second, and polysilicon gates and forming a protective layer on the polysilicon layer to protect the polysilicon layer during a CMP process, thereby improving the performance and yield of the semiconductor device. When the first terminal moves from the first address to a second address, the connection is changed to be between the second address and to the other terminal by means of a request from the first terminal and preferably a reply back to the first terminal. The system includes a camera to capture digital images of one or more subjects, a user input to receive data related to the one or more subjects who are being photographed, and a database to link the photographs with the data related to the respective subjects.