
Windows 7 (2010)
OLPC Sugar UI (2007)
Mac OS X v10.5 "Leopard" (October 2007)

Windows Vista (January 30, 2007)

Novell and Microsoft announced a joint patent agreement to cover their respective products (November 2, 2006)
Novell acquired SuSE (January 2004)
XP Service Pack 2 (August 6, 2004)
Windows Server 2003 (April 24, 2003)
Windows XP (October 25, 2001)
DistroWatch (May 31, 2001)
Linux 2.4.0 (January 4, 2001)
Darwin (2000)
Windows Me (September 14, 2000)
Windows 2000 (February 2000)
Gnome (1999)
Wizards of OS (1999)
Linux From Scratch (1999)
Windows 98 (June 25, 1998)
the Linux Distro Timeline (1998)
Virtual PC (June 1997)
GTK+ (1997)
kde (1996)
Linux 2.0.0 (June 9, 1996)

Windows 95 (August 24, 1995)
beos (1995)
Debian (1993)
OS/2 Warp (1994)
Suse (1994)
Magic Cap (1994)
Copland (1994)
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Qt (1994)
OpenStep (1993)
Common Desktop Environment (1993)

Windows 3.1 (August 1992) was released two years after Version 3.0
Linux (September 1991)
Windows 3.0 (May 22, 1990)
geos (1990)
openwindows (1989)
the NEXTSTEP operating system (September 18, 1989)
Posix (1988)
open look (late 1980s)

Windows 2.0 (December 9, 1987) was released, with icons & overlapping windows
OS/2 1.0 (December 1987)
IBM AIX (1986)
GEOS (1986)
lynxos (1986)
Microsoft Windows
1.0 (November 1985) was Microsoft's first attempt to implement
a
multitasking graphical user interface-based operating environment on the PC
platform.
Desq (July 1985)

Atari TOS (1985)

AmigaOS (1985)
TopView (1985)
GEM (1985)
Plan 9 from Bell Labs (mid-1980s)
V (1980s)
Motif (1980s) is a graphical widget toolkit for building graphical user interfaces under the X Window System on Unix
the TRON Project (1984)
X Window System (1984)

Macintosh's System 1.0 (January 24, 1984)
HP-UX (1983)

the Apple Lisa (January 1983) was the second computer with a graphical user interface
SunOS 1.0 (1982)
IRIX (1982)
qnx (1982)
MS-DOS (August 1981) was released with the first IBM PC
QDOS (1980)
Xenix (1979)
ucsd pascal p system (1978)
Berkeley Software Distribution (1977)
cp/m (1974)

the Xerox Alto (1973) was the
first personal computer and the first
computer to use the desktop metaphor
and graphical user interface (GUI)

Unix (1970) was officially named and ran on the PDP-11/20. The operating
system was developed in the 1960s by a group of AT&T Bell Labs employees
Multics (1964)
OS/360 (1964)
GCOS (1962)
CTSS (1961)
IBSYS (1960)