Administrator

The Admin or Administrator of a server is the person who takes responsibility for the server. It may be that the server is running from their machine, or that they simply have jurisdiction over a room which is physically stored on a benefactor's computer.

Terminology
The term Admin is not interchangeable with Op. An op is a person designated, by the original administrator, to police the room on their behalf. There may be multiple ops, but only one admin in a room.

Powers
Administrators have all of the commands available to ops, and also the advantage of the tools available from the server software. Admins have control over the selection and implementation of the map, and can choose the settings for the room, such as maximum number of players, players allowed from the same IP address, and the name and MOTD of the room. The admin can also ghost the room; receiving chat from within, and adding to it, via the console, without being in the room.