What is an SIC code?
The Standard Industrial Code (SIC) is a 4-digit number that identifies a US business by the type of business activities they conduct. Since each SIC broadly describes a class of business activity, business do not receive a unique SIC. For example, software development companies might be classified with an SIC code of 7371.
To determine the most appropriate SIC for a company, use this US Dept of Labor tool.
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