administrator

administrator: In the Windows Server 2003 family, a person who is responsible for setting up and managing local computers, stand-alone servers, member servers, or domain controllers. An administrator sets up user and group accounts, assigns passwords and permissions, and helps users with networking problems. Administrators can be members of the Administrators group on local computers or servers. A person who is a member of the Administrators group on a local computer or server has full access to that computer or server and can assign access control rights to users as necessary.

Administrators can also be members of the Domain Admins group on domain controllers and have full control over user and computer accounts residing in that domain.