rooms: rooms are the particular places on the chat servers where user gather to converse with one another.
It is a good metaphor because a typical chat server has hundreds of different rooms, most of them usually described
by user interests. It is also possible to create private rooms for other purposes.
op: op is short for operator. Some chat servers allow users to be ops in order to control the flow of
conversation in the room. The op would have a special window in his or her chat client that would allow the op
to remove users from the room, for example.
nick: to identify users on a chat server, and to make sure that all of the users have unique identities,
a system of nicknames is used. Before logging on to a chat server, the user will be asked to choose a nick to uniquely
identify him or her.
kick: kick is just one example of the commands available to ops. An op can kick another chat room member
to temporarily limit that member's use of the chat room.
