The DE-9 connector (above) used for CGA, MDA, and Hercules cards, and DE-15 connector (below) used for VGA In 1987, IBM defined a new graphics standard to push the graphics on their PC to levels ...

There was MDA, familiar through the original text-based DOS prompt, CGA, then EGA, and the non-IBM Hercules along the way. Finally in 1987 IBM produced the VGA, or Video Graphics Array standard ...

Most computer monitors today are digital but may also have an optional input that accepts analog signals from a VGA graphics card ... Examples are the earlier MDA, CGA and EGA monitors used ...