How can I determine the SIC/NAICS for a particular line of business or industry?
Use the Standard Industrial Classification Manual (Ref. HF 1042 .A55) or The North American Industry Classification System (Ref. HF 1042 .A55 .N67). This can also be done on the Internet by going to the following addresses: For NAICS - www.census.gov/eos/www/naics and for SIC - http://www.osha.gov/pls/imis/sicsearch.html