Introduced in Windows NT 4.0 in 1996, as of the 2009 launch of Windows Server 2008 R2, Terminal Services became part of Remote Desktop Services (RDS), and specifically, the "shared sessions ...
NT did not support Plug and Play, which was later added in Windows 2000 and XP (also based on the NT core technology). Clustering and failover was added to Windows NT 4 Server, Enterprise Edition.