A series of organizations soon emerged to meet the growing demand of diamond marketing. These included the Diamond Corporation, which was formed to finance the enormous resources necessary to support existing and planned rough diamond marketing organizations. In 1933, an even larger group was formed, called the Diamond Producers Association, which included the large South African producers, the South African Government and the original Diamond Corporation. The creation of the Diamond Trading Company allowed them to buy and sort all the rough produced by the DPA. The DTC eventually marketed the rough through a single sales channel, the Central Selling Organization (CSO). All these departments were united under De Beers which gave them the necessary control over the worldwide market that is still in force to this very day.