The SIC code is a standardized numbering system developed by the Federal Government that classifies business establishments according to their industries. It is particularly helpful when you're looking to segment markets, analyze customer relationships, and conduct general business research. SIC codes divide all major economic activity into ten major divisions. Businesses are then further classified within each division. The first two digits in the code represent a company's major industry affiliation and its subdivision. For example, the first two digits in "Manufacturing," one of the ten major SIC divisions, range from 20 to 39. The remaining digits break down the divisions into specific activities and "sub-industries." If more than one SIC Code is listed, the first one is the company's primary line of business, with others comprising at least 10 percent of the company's revenue. A maximum of six SICs will be listed for a company. Details can be found in the Operations Section of the Business Information Report.