Currently Microsoft sells Windows 7, the latest operating system version that is flagship company. But it all began over two decades, with Windows 3.11 . One of the first releases of Microsoft OS that already had the famous windows instead of the command line as in MS-DOS, and therefore received the Windows name.
To test the Windows 3.11 in Java you need a browser considered modern. Below is the list of some browsers that meet the requirement.
Mozilla Firefox 3.6
Internet Explorer 8