For all of us old enough to remember the early days of the internet, Internet Explorer was not always the only browser around. Most people used Netscape (before it was seduced by the dark side and was bought by AOL). Netscape has the great honour of prompting the coining of the term open source by releasing its source code to the public in 1998. For those who used the internet before 1995 (we are talking pre-history here), there were a bunch of browsers that used to compete for our attention, including Cello, Mosaic, and Lynx (a text-based browser).
Now, the era of Internet Explorer may be at an end with the release of Firefox 1.0. I have been using early releases, that were not too great, but the final release is great, it imports your settings, bookmarks and cookies from IE. Technollama greatly recommends that you break the Microsoft monopoly and install it.