Source : Free On-Line Dictionary of Computing

Color Graphics Adapter
     
         (CGA) One of {IBM}'s earliest hardware
        video {display standards} for use in {IBM PC}s.  CGA can
        display 80*25 or 40*25 text in 16 colors, 640*200 {pixels}
        graphics in 2 colors or 320*200 in 4 colors (IBM PC video
        modes 0-6).  It is now obsolete.
     
        (1995-11-11)