Evolução dos sistemas operativos duarte andre By dutulo Period: 1969 to 1969 Unix Period: 1972 to 1972 Atari Dos Period: 1981 to 1981 MS-DOS / IBM PC DOS Period: 1984 to 1984 Mac OS Period: 1987 to 1987 OS/2 Period: 1991 to 1991 Linux Period: 1992 to 1992 Windows 3.1 Period: 1995 to 1995 Windows 95 Period: 1998 to 1998 Windows 98 Period: 1999 to 1999 Windows 98 SE Period: 2001 to 2001 Windows XP Period: 2001 to 2001 OS X Period: 2006 to 2006 Windows Vista Period: 2007 to 2007 iOS Period: 2008 to 2008 Android Period: 2009 to 2009 Windows 7 Period: 2012 to 2012 Windows 8 Period: 2015 to 2015 Windows 8