London, UK -  September 12, 2005 -- OneSource Information Services, Inc., a company of infoUSA (NASDAQ: IUSA), today announced a new content service, Match and Append, for OneSource customers.  With Match and Append, OneSource users can quickly and easily load or update their CRM or other internal customer information systems with essential company profile and contact details from OneSource.  As a result, OneSource customers can significantly improve the accuracy and completeness of the information available across their enterprise.

“Sales and marketing professionals have been frustrated with out-of-date and incomplete data in their internal customer information systems.” said Yvonne Cekel, President of OneSource Information Services, Inc..  “With Match and Append, we can quickly and easily load and update the most accurate, timely and comprehensive business information available today making customer information systems more useful,and equipping sales and marketing teams to be more productive.”

With Match and Append, OneSource enables users to match internal customer and prospect data against OneSource’s comprehensive repository of business information and then load complete company profile and executive records or update incorrect or missing data fields within their existing systems.  Once a OneSource record is stored in a system, it is automatically linked to the OneSource Information Warehouse allowing on-demand updates to keep information current.

The new Match and Append service is performed by a group of OneSource content specialists using a proprietary matching algorithm designed to work with a customer provided list of clients and prospects.  The account list is matched against the OneSource Global Business Taxonomy system, a classification system providing a state-of-the-art framework that organizes and integrates a wide range of business information on over 3 million companies worldwide.  Applying processes and procedures learned over the last 15 years, matched results are ranked according to the validity of the match, varying from low confidence to high confidence. Once the list of accounts has been matched, the OneSource profile and executive data is then appended to the records, improving the quality of their internal information.

Pricing and Availability
The new service, which supports salesforce.com, Siebel, Microsoft Word, and other CRM and customer information systems, is available immediately with pricing starting at $2,500.

About OneSource Information Services, Inc. OneSource, an infoUSA company, and a recognized leader in business information solutions, delivers unparalleled company,  executive, and industry intelligence that makes business professionals more effective and productive in completing their critical daily tasks.

OneSource products and services support a company''s vital business processes, including serving customers, finding and leveraging new opportunities, and managing suppliers and partners.   OneSource combines and organizes content from over 2,500 information sources supplied by more than 35 world-class content providers, creating an unequalled information resource encompassing company profiles, corporate families, industries, executives, financials, news, analyst reports, and trade and business press articles.

OneSource is headquartered in Concord, MA, with offices located in North America, Europe, and the Pacific Rim. Product information is available at www.onesource.com . Customers include Bank One, Chubb, Citigroup, Deloitte & Touche, i2 Technologies, Orange, SAS Institute and Sun Microsystems.

About infoUSA
infoUSA (www.infoUSA.com ), founded in 1972, is the leading provider of business and consumer information products, database marketing services, data processing services and sales and marketing solutions. Content is the essential ingredient in every marketing program, and infoUSA has the most comprehensive data in the industry, and is the only company to own a proprietary database of 250 million consumers and 14 million businesses under one roof.

The infoUSA database powers the directory services of the top Internet traffic-generating sites, including Yahoo! (Nasdaq:YHOO - news) and America Online (NYSE:TWX).   Nearly 3 million customers use infoUSA''s products and services to find new customers, grow their sales, and for other direct marketing, telemarketing, customer analysis and credit reference purposes. infoUSA headquarters are located at 5711 S. 86th Circle, Omaha, NE 68127 and can be contacted at (402) 593-4500.

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Note to editors: For further information please contact:

Teresa Horscroft
PR Consultant
01420 564346 / 07990 520390
teresa.horscroft@btinternet.com

Paul Brown
OneSource Information Services
020 7367 5700
Paul_brown@onesource.com