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:
- FactSet's Revere, line-of-business, about 11,000 leaf nodes, acquired in 2013
- IndustryBuildingBlocks, line-of-business about 15,000 leaf nodes
- First Research taxonomy, used by Hoover's
- WAND, Inc.'s Product and Service Taxonomy
- Market Research Consulting Firm
- 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.
- Bernard Guibert, Jean Laganier, and Michel Volle, "An Essay on Industrial Classifications", Économie et statistique 20 (February 1971) full text