Workbench 2.0 (1990, with A3000) was a massive leap: new 3D look (GadTools), Commodities, Locale system, ASL requesters, clipboard, Preferences programs instead of a single prefs editor, ARexx integration, CrossDOS, improved multitasking. The interface switched to gray-blue. Workbench 2.04 fixed bugs, 2.05 brought CrossDOS improvements, 2.1 (1992) improved Locale and introduced AmigaGuide. OS 2.x required at least 1MB Chip RAM.