A person's identification on an individual computer system.
The object in the visitor pattern that performs an operation on the elements of a structure one by one.
Someone who pays a visit to a specific place or event; a sightseer or tourist.
An object which lands or passes by Earth or its orbit.
A head or overseer of an institution such as a college (in which case, equivalent to the university's chancellor) or cathedral or hospital, who resolves disputes, gives ceremonial speeches, etc.
A person authorized to visit an institution to see that it is being managed properly.
An extraterrestrial being on Earth for any reason.
Someone, or a team, that is playing away from home.
Someone who visits someone else; someone staying as a guest.