Brotherhood groups in the United States have been prominent and widespread throughout the history of labor organizations. Other important societies include the Brotherhood of Locomotive Firemen, the Brotherhood of Railroad Trainmen, the Brotherhood of Railroad Trackmen, the Switchmen's Union of North America, and the Order of Railroad Telegraphers. These brotherhoods have similar objects which are partly social and educational. Their chief aim is the improvement of the industrial status of their members and the promotion of their economic interests as employees. They arrange wage schedules, and make arrangements about overtime, and they secure both life and disability insurance.