An Acronym for Color Graphics Adapter.
Its display quality was abysmal due to low resolution:
Superseded by EGA.
Hands up how many people remember playing Sierra adventure games in stunning white, black, cyan and magenta? sigh... --JohnMcPherson
I do.. I also remember the white looked more like grey on most screens. God, the graphics looked awful on those screens. Funny how the games seemed so much more fun back then than nowadays.. --AristotlePagaltzis