1975 – company founded by gates and allen
1981 – qdos purchased from seattle computer products
1981 – pc dos 1.0 released
1982 – pc dos 1.1 released
1983 – pc dos 1.2 / 2.0 / 2.1 released
1983 – Word released for DOS (with mouse support)
1984 – pc dos 3.0 released
1985 – pc dos 3.1 released
1985 – released word and excel for apple macintosh
1985 – windows 1.0 released
1986 – ipo
1986 – pc dos 3.2 released
1987 – windows 2.0 released
1989 – windows 2.1 released
1990 – windows 3.0 released
1990 – microsoft office bundle (word / excel / powerpoint) released
1991 – ms dos 5.0 released
1992 – windows 3.1 released
1993 – ms dos 6.0 / 6.2 released
1993 – windows nt 3.1 released
1994 – windows nt 3.5 released
1995 – windows 95 released
1995 – windows nt 3.51 released
1995 – internet explorer 1 released
1995 – internet explorer 2 released
1996 – windows nt 4.0 released
1996 – internet explorer 3 released
1997 – internet explorer 4 released
1998 – windows 98 released
1999 – internet explorer 5 released
2000 – windows me released
2000 – windows 2000 released
2000 – internet explorer 5.5 released
2000 – steve ballmer replaces bill gates as ceo
2001 – xbox released
2001 – windows xp released
2001 – internet explorer 6 released
2006 – windows vista released
2006 – internet explorer 7 released
2007 – office 2007 released with ribbon
2009 – windows 7 released
2009 – internet explorer 8 released
2011 – skype purchased – $8.5b
2011 – internet explorer 9 released
2012 – windows 8 released
2012 – internet explorer 10 released
2013 – windows 8.1 released
2013 – internet explorer 11 released
2014 – satya nadella replaces steve ballmer as ceo
2015 – windows 10 released
2016 – linkedin purchased – $26b