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VGA (Video Graphics Array) is a legacy display interface and a 15-pin analog video connector, introduced by IBM in 1987, that connects computer output devices to monitors and projectors. It was a widely adopted standard that established a 640x480 resolution but has since been superseded by higher-quality digital connections like DVI, HDMI, and DisplayPort. While still functional, VGA transmits analog signals, which can lead to signal degradation, making it less common for modern digital displays.

Key Aspects of VGA

Analog Signal: VGA transmits analog video signals (Red, Green, Blue, and sync signals), which are more susceptible to interference and degradation than digital signals.

15-Pin Connector: The physical connector is a 15-pin, three-row, trapezoidal D-subminiature connector found on many older graphics cards and monitors.

Resolution: The foundational VGA mode supported a standard resolution of 640x480 pixels, though Super VGA (SVGA) versions allowed for higher resolutions.

Legacy Standard: VGA was once the industry standard but is now considered a legacy connector.

Compatibility: Its widespread adoption means many older devices still use VGA, making it useful for troubleshooting or connecting to legacy hardware.