IE4 came out in Sept 1997 vs August 1995 IE. IE4 was the first time that IE was bundled with Windows. There was a ton of development with a huge IE development to catch up and eventually surpass Netscape.

FUNNY IE 4 release story: > In October 1997, Internet Explorer 4.0 was released. The release party in San Francisco featured a ten-foot-tall letter "e" logo. Netscape employees showing up to work the following morning found the giant logo on their front lawn, with a sign attached that read "From the IE team ... We Love You". The Netscape employees promptly knocked it over and set a giant figure of their Mozilla dinosaur mascot atop it, holding a sign reading "Netscape 72, Microsoft 18" representing the market distribution. http://home.snafu.de/tilman/mozilla/stomps.html