was the DE-9 connector used on the IBM Professional Graphics Controller (PGC). It used 9-pin connector like the Color Graphics Adapter (CGA) and Enhanced Graphics Adapter (EGA) but was otherwise a VGA-compatible RGB signal. Significantly, early NEC MultiSync monitors had a 9-pin male port on the back with this pinout. This was used in some early VGA and VGA-compatible hardware because the standard pre-existed VGA. It is also found in some industrial hardware from the era.

This "9-pin VGA" lacks several