Workbench 1.0 1985 Commodore Workbench 1.1 1986 Commodore Workbench 1.1 (PAL) 1986 Commodore Workbench 1.2 Rev. 33.43 (De) 1986 Commodore Workbench 1.2 Rev. 33.56 A500/A2000 1987 Commodore Workbench 1.2 Rev. 33.56 A500 (US) 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 (Enhancer Software) 1988 Commodore Workbench 1.3 Rev. 34.20 (US) 1988 Commodore Workbench 1.3 Rev. 34.20 (UK) 1988 Commodore Workbench 1.3 Rev. 34.20 (De) 1988 Commodore Workbench 1.3 Rev. 34.21 (No) 1988 Commodore Workbench 1.3 Rev. 34.20 (Dk) 1988 Commodore Workbench 1.3.2 Rev. 34.28 (US) 1988 Commodore Workbench 1.3.2 Rev. 34.28 (UK) 1988 Commodore Workbench 1.3.2 Rev. 34.28 (De) 1988 Commodore Workbench 1.3.2 Rev. 34.28 (Es) 1988 Commodore Workbench 1.3.2 Rev. 34.28 (It) 1988 Commodore Workbench 1.3.2 Rev. 34.28 A3000 (US) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (Enhancer Software) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (US) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (UK) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (De) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (Fr/Be) 1990 Commodore Workbench 1.3.3 Rev. 34.34 (Dk) 1990 Commodore Workbench 2.0 Rev. 36.68 A3000 1990 Commodore Workbench 2.01 Rev. 36.69 A3000 1990 Commodore Workbench 2.03 Rev. 36.102 A3000 1991 Commodore Workbench 2.04 Rev. 37.67 1991 Commodore Workbench 2.04 Rev. 37.67 A3000 1991 Commodore Workbench 2.05 Rev. 37.71 1992 Commodore Workbench 2.05 Rev. 37.71 A3000 1992 Commodore Workbench 2.05 Rev. 37.72 1992 Commodore Workbench 2.1 Rev. 38.35 1992 Commodore Workbench 2.1 Rev. 38.36 1992 Commodore Workbench 3.0 Rev. 39.29 1992 Commodore Workbench 3.1 Rev. 40.42 1994 Commodore Workbench 3.1 Rev. 40.42 (ESCOM) 1995 ESCOM Workbench 3.1 Rev. 40.42 A4000T (ESCOM) 1995 ESCOM AmigaOS 3.5 1999 Haage & Partner AmigaOS 3.9 2000 Haage & Partner AmigaOS 4.0 Classic 2007 Hyperion Entertainment