移动电话在许多国家已达到相当高的普及程度，其中数字蜂窝移动电话GSMC全球通，已成为一种数字移动电话的象征。因特网（Internet）则是走向信息高速公路的起点。它是网中网，凡是采用TCP／IP协议，通过电话线和．调制解调器MODEM连上网中任何一台主机进行通信的计算机都可成 Mobile phones have reached a fairly high level of penetration in many countries, including the digital cellular mobile phone GSMC GSM, which has become a symbol of digital mobile phones. The Internet is the starting point for the information superhighway. It is the net in the net, all adopt TCP / IP agreement, pass telephone line and. Modem MODEM Internet access to any one of the host computer can communicate