Windows 2000 is slated to be Microsoft"s business (and eventually -- personal) operating system of the future. Microsoft is investing more than $1 billion in research and development on Windows this year, and Bill Gates has said that he is "betting the company on Windows 2000." There are now at least 2,000,000 NT Server 4 installations. Windows 2000 Server is the successor to Windows NT. Some experts have predicted more than 1 million of these installations will move to Windows 2000 in its very first year!