SIC: Standard Industrial Classification [4 digits*]
Though this system was superseded by NAICS, some sources are still arranged by SIC code!
*Note: Some sources (e.g., ReferenceUSA database) use proprietary “enhanced” (longer) SICs.
EXAMPLE: INDUSTRY CODES FOR MCCORMICK
NAICS = 311942 ("Spice & Extract Manufacturing”)
SIC = 2099 ("Food Preparations, Not Elsewhere Classified")
Note: these are "primary" codes indicating McCormick’s main line of business.
Industry Information through the US Economic Census