[image from flickr user AroundTuscany]
Standard Industrial Classification (SIC) codes. These codes were developed to help the Census Bureau and other statistical agencies gather data on industries. You may need this code to find lists of companies in an industry or look up statistical and financial data for an industry.
The North American Industrial Classification System (NAICS) was created to replace SIC codes because so many new industries had emerged there were not enough four digit SIC codes to classify these new industries. NAICS codes are 6 digits. SIC codes are 4 digits. Since older data is still classified under the SIC codes you may need both codes for your research.
Use the tools under Companies in the left-hand menu of Lexis Nexis' main search page to locate industry financials.
Nearly every industry has an association and industry magazine dedicated to informing industry members about the latest trends and statistics in that industry. These are crucial tools for understanding an industry. Use the tools below to locate the associations and magazines for an industry.