The Amiga system was introduced in 1985 by Commodore Business Machines. The first model, the Amiga 1000, boasted 6 bit colour, a standard resolution of 640*256, 8 bit stereo sound, 256 Kb of RAM and a revolutionary GUI-based operating system (Workbench); many models followed, the most advanced being the A4000, introduced in 1992, which had 8 bit colour, 4 Megabyte RAM (expandable) and built-in IDE interface. Eventually Commodore went bankrupt due to its incapability to market the Amiga as anything else than a games machine, despite its revolutionary Operating System. Nowadays the machine has a loyal following and plans are underway to design a next-generation system based on it.