govinfo. Provides free online access to official publications from all three branches of the Federal Government.
World Development Data. Provides access to some 2,000 economic indicators by country.
Historical Statistics of the United States. Fully searchable data tables on population, economics, health, education, etc. throughout U.S. history. Tables may be printed or downloaded into Excel, SAS, or SPSS.
- The North American Industry Classification System (NAICS) 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.