The present invention combines a computer and a liquid crystal display to upgrade the security range. In the conventional computer, many times are exposed to hackers due to the up and down of a large number of files or various information processing processes in the Internet (LAN or WAN) network. have. The present invention is a combination of two computers and one liquid crystal display. One computer is connected to an internal network (LAN) and one computer is connected to an external network (WAN) to form a completely independent operating system. In addition, a switch circuit board consisting of analog and digital was installed to operate the operating system smoothly. Therefore, the operation method of the present invention is important and a large amount of information is processed into the internal network, that is, the company, organizations, organizations and institutions can be accessed independently, thereby avoiding the targets of hackers by exposure to the external Internet network. It is a device that can generate benefits in all aspects of installation, operation, and management.
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