Microsoft has replaced Windows 2000 Server products with Windows Server 2003, and Windows 2000 Professional with Windows XP Professional. Windows Neptune started development in 1999, and was supposed to be the home-user edition of Windows 2000. 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 was incorporated into the development of Windows XP. The only elements of the Windows 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.