As per the United States SIC Code system, there are 1,514 codes that are included in these levels: 2-digit, 3-digit, and 4-digit levels. The US government had written into the SIC Code manual that agencies could use additional subdivisions within specific four-digit industries to further break down industries. The SIC system divides the activities of establishments into 11 divisions. These divisions are then divided into 83 2-digit major groups. These major groups are divided into 416 3-digit industry groups, and at last, into 1,005 4-digit specific industries.