Windows Internet Explorer (formerly Microsoft Internet Explorer abbreviated MSIE), commonly abbreviated to IE, is a series of graphical web browsers developed by Microsoft and included as part of the Microsoft Windows line of operating systems starting in 1995. It has been the most widely used web browser since 1999, attaining a peak of about 95% usage share during 2002 and 2003 with IE5 and 6 but steadily declining since, despite the introduction of IE7. Microsoft spent over 100 million dollars (USD) a year in the late 1990s, with over 1000 people working on IE by 1999.
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