Enhanced Graphics Adapter
EGA is a video display standard introduced by IBM around
1984.  It became popular a couple of years later when
low-cost non-IBM versions became available.

It supports the CGA standard but improves upon it by
adding higher resolution and additional colors in
graphics modes.

Text: 16 colors; 40- and 80-columns/25-lines
40- and 80-columns/43-lines
Graphics: 16 colors; 640x350 (max)

Later standards, including VGA, support the CGA and EGA
standards but provide additional screen colors and
  TECH Help! covers programming aspects of the EGA in
detail.  See EGA in the Index.