The company now known as Dun & Bradstreet can be traced back to July 20, 1841, when the Lewis Tappan formed the Mercantile Agency in New York City. One of the most well know things about the company is their signature D-U-N-SŪ number system.
Business Reference Services is the starting point for
conducting research at the Library of Congress in the subject areas
of business and economics. Here, reference specialists in specific
subject areas of business assist patrons in formulating search strategies
and gaining access to the information and materials contained in the
Library's rich collections of business and economics materials.