Industry classification or industry taxonomy organizes companies into industrial groupings based on similar production processes, similar products, or similar behavior in financial markets.
1The NAICS Index File 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:
- Revere Data, line-of-business, about 11,000 leaf nodes
- IndustryBuildingBlocks, line-of-business about 15,000 leaf nodes
- First Research taxonomy, used by Hoover's
- WAND, Inc.'s Product and Service Taxonomy
- Standard & Poor's, "What's an Industry" pdf
- Dave Nadig, Lara Crigger, "Signal from Noise" IndexUniverse, p. 2
- First Research taxonomy at Hoover's
- Michael E. Porter (1980). Competitive Strategy. Free Press, New York. ISBN 978-0743260886.
- Michael E. Porter (1985). Competitive Advantage. Free Press, New York. ISBN 978-0743260879.
- An Essay on Industrial Classifications, Bernard Guibert, Jean Laganier and Michel Volle, Économie et statistique No 20, February 1971