CGA

from The Free On-line Dictionary of Computing (8 July 2008)

Color Graphics Adapter
CGA

   <hardware, graphics> (CGA) One of {IBM}'s earliest hardware
   video {display standards} for use in {IBM PCs}.  CGA can
   display 80*25 or 40*25 text in 16 colors, 640*200 {pixels} of
   graphics in two colors or 320*200 in four colors (IBM PC video
   modes 0-6).  It is now obsolete.

   (1995-11-11)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

CGA
       Colour Graphics Adapter

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

CGA
       Graphics Communications Association (org.)