1975 Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico
1981 Microsoft is restructured to become an incorporated business in its home state of Washington.
1985 Microsoft Windows 1.0 is released.
1990 Microsoft releases the Windows 3.0 operating system.
1995 Computer software developer Microsoft releases its Windows 95 operating system.
1999 The "Melissa worm" infects Microsoft word processing and e-mail systems around the world.
2000 United States v. Microsoft: Microsoft is ruled to have violated United States antitrust laws by keeping "an oppressive thumb" on its competitors.