R.H. Donnelley Corporation operates through its only direct subsidiary, R.H. Donnelley Inc., an independent marketer of yellow pages advertising in the United States, selling advertising for more than 175 yellow pages directories with a total circulation of over 15 million. The Company provides pre-press publishing services for approximately 240 yellow pages directories, including all of the directories for which it sells advertising. R.H. Donnelley has a diversified customer base of approximately 200,000 small to medium-sized businesses, many of which rely on yellow pages directories as their principal or sole form of advertising. At December 31, 2001, the Company's business was organized into two operating segments: the DonTech Partnership (DonTech) and Directory Advertising Services (DAS). Get Digital Smart, R.H. Donnelley's Internet operation, was ceased in December 2000.