A monitor is a piece of computer hardware that displays the video and graphics information generated by a connected computer through the display screen. It is an output device that displays information in pictorial or textual form. A monitor comprises a visual display, support electronics, power supply, housing, electrical connectors, and external user controls. The display in modern monitors is typically an LCD with LED backlight, having by the 2010s replaced CCFL backlit LCDs. Before the mid-2000s, most monitors used a CRT. Monitors are connected to the computer via DisplayPort, HDMI, USB-C, DVI, VGA, or other proprietary connectors and signals.
A monitor is used to display images, text, video, and graphics information generated by a connected computer via a computers video card. It is almost like a TV, but its resolution is much higher than a TV. The first computer monitor was introduced on 1 March 1973, which was part of the Xerox Alto computer system.
In addition to displaying information, some monitors also function as an input device. These monitors are also known as touchscreens, and they enable users to interact with the computer by using a finger or stylus instead of using a mouse or keyboard. When users touch the screen by their finger, it occurs an event and forwards it to the controller for processing. These types of screens include pictures or words that help users to interact with the computer. It takes input from the users by touching menus or icons presented on the screen.
Overall, a monitor is an essential component of a computer system, as it displays everything that is being processed inside the CPU.
