A liquid crystal display including a backlight module and a liquid crystal display panel is provided. The opening edge of the roof panel includes a flange portion formed to extend vertically downward from a roof panel body of the roof panel. The oxide defined area is formed on an insulating layer, extending across at least two neighboring SRAM cell areas for construction of a passing gate transistor and a pull-down transistor used in an SRAM cell. A display unit is connected to the main control unit. The client digital data processor executes, within that virtual machine environment, an applet for configuring the client digital data processor as a \u201cprocess controller\u201d that establishes communications over the network with the command processor and that monitors andor controls the process control apparatus via those communications.