It also refers to the type of connector use for computer graphics. You often hear people talking about VGA, DVI, HDMI... They are all different types of video connectors of which VGA is the oldest.
Let us have faith that right makes might, and in that faith, let us, to the end, dare to do our duty as we understand it. - Abraham Lincoln -
VGA is far from the oldest. It was predated by many others. Some early monochrome video adapters used a 9-pin connector that on casual inspection looks similar to VGA's 15-pin connector.