If you know which industry the company is a part of, you may decide to use a directory which is more focused on that particular industry sector.
Industry sectors are more or less well-defined areas of the economy.
It is a good idea to keep these industry classes in mind when looking for company information. For additional guidance, use SIBL 's list of industry-specific directories which organizes selected resources by subject. This resource provides descriptive information on over 50,000 U.S. manufacturers and developers of high-tech products. 17 High Tech Industries are covered and it can be searched by company name or ticker symbol. ZDNet's company finder database includes contact info on technology companies.