Workbench 1.0 1985 Commodore Workbench 1.1 1985 Commodore Workbench 1.2 Rev. 33.56 A500/A2000 1987 Commodore Workbench 1.2 Rev. 33.56 A500 1987 Commodore Workbench 1.2 Rev. 33.56 A500 (UK) 1987 Commodore Workbench 1.2 Rev. 33.56 A500 (De) 1987 Commodore Workbench 1.2 Rev. 33.56 A2000 1987 Commodore Workbench 1.2 Rev. 33.56 A2000 (De) 1987 Commodore Workbench 1.2 Rev. 33.61 A500/A2000 1987 Commodore Workbench 1.3 Rev. 34.20 1988 Commodore Workbench 1.3 Rev. 34.20 (UK) 1988 Commodore Workbench 1.3 Rev. 34.20 (De) 1988 Commodore Workbench 1.3.2 1988 Commodore Workbench 1.3.2 Rev. 34.28 (UK) 1988 Commodore Workbench 1.3.2 (De) 1988 Commodore Workbench 1.3.2 (It) 1988 Commodore Workbench 1.3.3 (US) 1990 Commodore Workbench 1.3.3 1988 Commodore Workbench 1.3.3 (UK) 1988 Commodore Workbench 1.3.3 (De) 1990 Commodore Workbench 2.04 Rev. 37.67 1991 Commodore Workbench 2.05 Rev. 37.71 1992 Commodore Workbench 2.1 Rev. 38.36 1992 Commodore Workbench 3.0 Rev. 39.29 1992 Commodore Workbench 3.1 Rev. 40.42 1995 ESCOM Workbench 3.1 Rev. 40.42 (A4000T) 1995 ESCOM AmigaOS 3.5 1999 Haage & Partner AmigaOS 3.9 2000 Haage & Partner AmigaOS 4.0 Classic 2007 Hyperion Entertainment