A circuit board fitted to a computer,
especially an IBM PC , containing the necessary video
memory and other electronics to provide a bitmap display .
Adaptors vary in the resolution (number of pixels ) and
number of colours they can display, and in the refresh rate
they support. These parameters are also limited by the
monitor to which the adaptor is connected. A number of such
display standards , e.g. SVGA , have become common and
different software requires or supports different sets.
