Administrative / clerical workers are managed by a supervisor and work can be in a small office with two or three people, or anything up to a large open-plan area. Nearly all work nowadays is done on a computer, and usually means that most of the day is spent sitting down. There is usually little contact with other people except for their immediate colleagues and supervisor, communication with other people mostly being by telephone. However, if their work is concerned with information distribution or the Mail, they may have to be on their feet for long periods of the day.