A monitor, also known as a display or screen, is an output device that displays visual information from a computer or other electronic device. It is typically a flat panel display that uses liquid crystal display (LCD), organic light-emitting diode (OLED), or other technology to create images. Monitors come in various sizes, resolutions, and aspect ratios, and can be connected to a computer using a variety of cables, such as HDMI, DisplayPort, or VGA. They are used to display text, images, videos, and other visual content and are an essential component of a computer system. Monitors are also used in a variety of other contexts, such as in gaming, home entertainment, and professional applications like video editing and graphic design.