Fantastic article on the battle royale between computer and gaming manufacturers in the runup to Christmas in 1983:
Coleco had entered the videogame console market late, introducing the Colecovision in mid-1982 just as Atari was beginning to wear out its welcome with the public. With its superior graphics and sound, and Donkey Kong as its pack-in game, it sold well before Christmas, but was not immune to the plague ET subsequently cursed the industry with and when Coleco management saw consumer sentiment was turning toward home computers they saw an opportunity to jump trains. The marketing department decided their ideal customer was parents of less-technically savvy teenagers who needed to do school assignments and wanted to play arcade conversions, and so they suggested adding a printer, keyboard and tape storage to the existing Colecovision console, rather than develop an entire new machine. It was hoped this could get the computer, christened the Adam, to market faster, but adding all those peripherals was trickier than expected, and despite promises to retailers Coleco failed to deliver most of the units in time for Christmas – and many of those they did deliver were defective. Poor reviews and disappointed potential customers coloured public sentiment and the Adam bombed, taking the Colecovision with it.