Internet Explorer 4.0
1997 September 30th
Microsoft released Internet Explorer 4.0. IE 4.0 was integrated into the Windows 95 and Windows 98 operating systems and was freely available for the Mac OS, Solaris and HP-UX platforms. The distribution methods and integration of Internet Explorer into Windows subsequently became one of the subjects of legal proceedings between the US government and Microsoft over the abuse of a dominant market position. Internet Explorer 4.0 gained more than 60% market share at the beginning of 1999, contributing significantly to Microsoft winning over Netscape in the so-called first browser war.