Windows 2000
Microsoft has replaced Windows 2000 Professional with Windows XP Professional, and Windows 2000 Server products with Windows Server 2003. A project code named "Neptune" started development in 1999. Neptune was based on Windows 2000, and it was supposed to be a home-user replacement for Windows 98. However, the project took a long time to create and only one pre-test (alpha version) release was created. Windows Me was released instead, and the Neptune project later turned into part of a project that became Windows XP. The only elements of the Neptune project which were included in Windows 2000 were the ability to upgrade from Windows 95 or Windows 98, and support for the FAT32 file system.