A crew usually is a group of people that work within a common organisation, and that have some activities in common. The usual place where crews can be found are ships and airplanes. On such ships and aircraft, some functions some people perform are very special. It is therefore common that crews are organised in a hierarchy. Every person, except the captain, at the top, has a person above them. They will report to that person. Crews also work backstage in theaters and on movie sets and in television studios.