North American Industry Classification System: is the standard used by Federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. business economy.
Research reports providing in-depth analysis, industry structure, product and customer segments, performance analysis, market share, and 5 year forecasts for North American, Chinese, and global industries.
Drill down to the specific NAICS code for a snapshot based on US Census data. (Keyword search is glitchy.) For data on number of establishments, payroll, and industry performance. The Economic Survey is conducted every 5 years. Latest data is from 2007. For more current information, use County Business Patterns in American Factfinder.
S&P's Industry Surveys track more than 50 North American industries and 10 global industries and include information about the current industry environment, industry trends, key industry ratios and statistics, etc.