The North American Industrial Classification System (NAICS) is an economic classification system. Economic units that use like processes to produce goods or services are grouped together. This "production-oriented" system permits statistical agencies in the United States, Canada and Mexico to produce data that can be used for measuring productivity, unit labor costs, and the capital intensity of production; constructing input-output relationships; and estimating employment-output relationships and other such statistics that require that inputs and outputs be used together. In 1997, the U.S. Office of Management and Budget (OMB) adopted NAICS as a replacement for the older, less-capable, U.S-only system called the Standard Industrial Classification (SIC) System.