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Industry classification or industry taxonomy organizes companies into industrial groupings based on similar production processes, similar products, or similar behavior in financial markets. A wide variety of taxonomies is in use, sponsored by different organizations and based on different criteria.〔Standard & Poor's, "What's an Industry" (pdf )〕 1The NAICS Index File〔http://www.census.gov/eos/www/naics/2007NAICS/2007_NAICS_Index_File.xls〕 lists 19745 rubrics beyond the 6 digits which are not assigned codes. Besides the widely used taxonomies above, there are also more specialized proprietary systems: * FactSet's Revere, line-of-business, about 11,000 leaf nodes, acquired in 2013〔http://www.factset.com/campaigns/revere〕 * (IndustryBuildingBlocks ), line-of-business about 15,000 leaf nodes * (First Research taxonomy ), used by Hoover's〔(First Research taxonomy at Hoover's )〕 * (WAND, Inc.'s Product and Service Taxonomy ) * (Market Research Consulting Firm ) ==See also== * Product classification 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「industry classification」の詳細全文を読む スポンサード リンク
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