There are quite a few names for this famous tool collection. Some write Adminpak, Admin Pack or Adminpack. The official name is Administrations Tools Pack, but Microsoft often speaks about the Windows Server 2003 management tools. Now, you have to learn a new name: RSAT or Remote Server Administration Tools. This is how the management tools are called under Windows Server 2008.
... Now I have just read that Microsoft plans to release a Vista version of RSAT shortly after Service Pack 1 becomes available.
Source : 4sysops.com