 The first two digits designate the largest business sector, the third digit designates the subsector, the fourth digit designates the industry group, the fifth digit designates the NAICS industries, and the sixth digit designates the national industries.NAICS is a collaborative effort by Mexico's "Instituto Nacional de Estadística y Geografía" (INEGI), Statistics Canada, and the United States Office of Management and Budget (OMB), through its Economic Classification Policy Committee (ECPC), staffed by the Bureau of Economic Analysis (BEA), the Bureau of Labor Statistics (BLS), and the Census Bureau.The system is designed to be largely compatible with the United Nations Statistical Office's International Standard Industrial Classification system (ISIC).