To everyone today, VGA is just the old-looking blue port on the back of a computer used for video. This is somewhat true, but a lie of omission – the VGA standard is more than just a blue DE-15 ...

(D-SUBminiature connectors) A family of plugs and sockets widely used in communications and on earlier PCs. For example, the analog VGA monitor interface uses a D-sub 15-pin plug and socket.

which goes far beyond the physical differences of the DA-15 versus the standard DE-15 D-subminiature connectors. Whereas the VGA standard defines the RGB signals along with a VSYNC and HSYNC ...