MONITOR

The screen you are reading this on is also called a monitor, because it lets
you see (monitor) the output of the computer. Screens are of two types.

COLOR					MONOCHROME

The screen shows a variety of colors.	The screen shows black or white and one
You can control the colors with the	other color (white, amber, or green).
MODE and PROMPT commands.		It is a monochrome (one-color) screen.
					You can control that one color with the
					MODE and PROMPT commands. 

There are several quality levels of	There are only two quality levels of
color, identifed by their Graphics	monochrome monitors, identified by
Adapter (GA - the board in the 		their adapter. From oldest to newest, 
computer that controls the screen).	they are:
From least to most capable, they	   Monochrome Display Adapater (MDA)
are:					   Hercules Graphics Adapter (Hercules)
	Color GA (CGA)
	Enhanced GA (EGA)
	Multi-color GA (MCGA)
	Professional Graphics Controller (PGC)
	Video Graphics Array (VGA).
