LCD actually simply means liquid crystal display. An industrial LCD monitor is typically used with an industrial computer, but can also be used only to display video images from just about any video source that is efficient available, and the most common and diverse electronic flat panel display technology in use now. The LCD technology is now almost completely replaced the older cathode ray tube technology that is we all know and used for industrial monitors for many, many years. ItIt is interesting to highlight that LCD monitors to only one third to one-half of current through the cathode ray tube monitor used tend to use, can be up to about 90% less space and are easier on the eyes. So in the end, no wonder why they replaced the cathode ray tube monitor.