Electronic Data Gathering, Analysis, and Retrieval (EDGAR) of U.S. Securities and Exchange Commission (SEC) Filings
http://www.sec.gov/edgarhp.htm
Performs automated collection, validation, indexing, acceptance, and forwarding of submissions by companies and others who are required by law to file forms with the U.S. SEC.

Harris InfoSource
http://www.harrisinfo.com/servlet/HIServlet?moduleName=session&methodName=getHomePage
Directory of products and manufacturers.

Hoover's Online
http://www.hoovers.com/
Basic company information on more than 13,500 public and private enterprises in the United States and around the world.

MNI Guide to U.S. Manufacturers
http://mniguide.com/index.asp
Directory of U.S. manufacturers.

Thomas Register of American Manufacturers
http://www.thomasregister.com/
155,000 companies, 60,000 product and service classification headings and 124,00 brand names. Access to 5,500 online supplier catalogs and 1000+ company Web sites. Lists mainly American and some Canadian manufacturers.

Whitepages.com
http://www.whitepages.com/
Find a U.S. business or person by name or perform a reverse look up by telephone number. Features simple/user friendly search interface.

Yellow Pages
http://www.yellow.com/
U.S. business by category or name.

Updated September 2008