AT & T AnyWho Find people and businesses in the United States and Canada. It includes a reverse lookup feature and e-mail lookups.

AMA Physician Select Provides basic professional information such as address, birth date, and date of graduation from medical school on virtually every licensed physician in the U.S.

Hoover's Online Complete profiles of more than 12,000 U.S. public and private companies. Provides access to SEC filings, current and historic financials, and selected news articles.

Europages, the European Business Directory The site lists 500,000+ companies, mainly in Europe. Offers the ability to search by company name, country and product or service. Includes some company catalogues, web sites and European yellow pages.

Martindale-Hubbell Lawyer Locator National directory of lawyers and law firms is searchable by name or firm and includes ratings of lawyers.

ProFile on the Web Directory of architecture firms and businesses in the United States. It can be searched by firm name, location, key personnel, and special focuses and services.

Thomas Register Directory of 150,000+ American manufacturers of industrial products and services. Open a free membership on the site to search.