Sageworks industry selections are categorized by the North American Industry Classification System (NAICS). Each industry category has a NAICS code (from 2012). These codes are issued by the government and are often found on tax returns.
To learn more about NAICS codes, go to http://www.census.gov/epcd/www/naics.html.
The nonprofit industry selections are categorized by the National Taxonomy of Exempt Entities (NTEE) classification system.
To learn more about NTEE codes, go to http://nccsdataweb.urban.org/PubApps/nteeSearch.php?gQry=all&codeType=NTEE.