Internet Explorer Logo — Windows Internet Explorer (formerly Microsoft Internet Explorer), commonly known as IE, is a web browser developed by Microsoft for the operating system Microsoft Windows since 1995. It has been the most widely used web browser Internet from 1999 to present, with a peak usage charge of 95% between 2002 and 2003. However, that market share has decreased steadily over the years due to renewed competition from other browsers, reaching approximately 34% and 55% by the end of November 2011, depending on the source of global measurement.

Its latest version is 9.0 , published on March 14, 2011, in May and is available as a free update for Windows Vista SP2 or Windows Server 2008 SP2, as well as Windows 7 and Windows Server 2008 R2. The operating systems Windows XP, Windows 2003 and earlier are not supported. This new version of Internet Explorer includes significant advances in the interpretation of web standards with respect to their precursors, such as support for CSS3 , SVG , HTML5 file format web typography “WOFF”, and includes performance improvements such as acceleration hardware for the rendering of web pages and a new engine for JavaScript called Chakra.

There have also been compilations of Internet Explorer (some now discontinued) for other operating systems, including Internet Explorer Mobile (Windows CE and Windows Mobile), Internet Explorer for Mac (Mac OS 1.7 to 10) and Internet Explorer for UNIX (Solaris and HP -UX).

The project started in Internet Explorer the summer of 1994 by Thomas Reardon and subsequently led by Benjamin Slivka, leveraging source code from Spyglass, Inc. Mosaic, one of the first commercial web browser with formal ties with the browser pioneer NCSA Mosaic. In late 1994, Microsoft is hosting the licensing of Spyglass Mosaic for further development through a quarterly fee plus a percentage of the revenue generated by the profits they received from the software. Although with a name similar to NCSA Mosaic, Spyglass Mosaic used the NCSA Mosaic source code only in moderation.

Internet Explorer was first released for installation as a supplement to Microsoft Plus! for Windows 95 in 1995. Subsequently be introduced in certain versions for free OEM Windows 95, and also included by default in later versions of Windows. However, the operating system to allow them take the browser for free (thereby avoiding the payment of royalties to Spyglass, Inc.), made ​​shortly after translated into a demand and a subsequent compensation of several million dollars.

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