What are SIC and NAICS codes?

Both Standard Industrial Classification (SIC) and North American Industrial Classification System (NAICS) codes identify a firm's primary business activity. For example a firm with SIC 571 primarily sells retail furniture. A firm with NAICS 311 is primarily engaged in food manufacturing.

These codes were developed by the federal government and are used by the U.S. Office of Management and Budget (OMB) as well as many other U.S. statistical agencies. In 1997, OMB adopted NAICS as its new industry classification system.

Every registered Washington firm is assigned a SIC or NAICS code. SIC codes can be up to four digits and NAICS codes can be up to six digits. The Quarterly Business Review (QBR) and the other Create a Report functions (i.e. Gross Business Income report, Statewide Taxable Retail Sales report, Local Sales/Use report) use these codes to group firms together to create informative and useful information. Because the national standard changed from the use of SIC codes to the use of NAICS codes, in November 2004 the Department stopped assigning SIC codes and now only assigns NAICS codes.

For a list of SIC codes click here. For a list of NAICS codes click here.

查看LIST的相关网站链接：

https://www.osha.gov/pls/imis/sicsearch.html

http://www.melissadata.com/lookups/sic.asp

http://www.stssamples.com/sic-code.asp

http://dor.wa.gov/content/aboutus/statisticsandreports/sic_vs_naics.aspx

http://naics.stores.yahoo.net/sictonaicasf.html

http://www.naics.com/referencefiles.htm