History of Microsoft By domenicasg99 Jan 21, 1975 Microsoft was started with Bill Gates as the first CEO. Aug 23, 1977 The company opened their first international office in Japan, called ASCII Microsoft. Apr 13, 1980 Microsoft's first operating system product was released on a version of Unix called Xenix. May 22, 1981 The company incorporated in the state of Washington and became Microsoft Inc. Nov 6, 1981 Microsoft wrote the operating system MS-DOS for IBM. May 2, 1983 Microsoft Mouse was released. Jul 23, 1983 Microsoft Windows was an operating system for IBM Computers. Oct 8, 1986 Microsoft went public and Bill Gates became a 31-year old billionaire. Apr 24, 1989 Microsoft Office was released. Aug 23, 1995 Microsoft releases Windows 95, which includes technology for conecting to the internet. Sep 22, 2001 Microsoft introduced their first gaming Unitm the Xbox system.