Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CCDW Submits Certifications of Financial Statements VERNON HILLS, Ill. - August 13, 2002 - CDW Computer Centers, Inc. (NASDAQ: CDWC), a leading provider of technology products and services, today announced that the company submitted its Certifications of Financial Statements today with the U.S. Securities and Exchange Commission (SEC). John A. Edwardson, chairman and chief executive officer, and Barbara A. Klein, senior vice president and chief financial officer, executed the certifications. The certifications cover CDW's Form 10-K for 2001, Form 10-Q reports for the first and second quarters of 2002, the 2002 proxy statement, and the Current Reports on Form 8-K which are required to be covered by the certifications. The SEC issued an order on June 27, 2002 requiring sworn statements from large publicly-traded companies certifying that there are no material misstatements nor material omissions in these SEC filings. Copies of the certifications are available on CDW's Web site at www.cdw.com/investor. About CDW CDW® (Nasdaq: CDWC), ranked No. 414 on the FORTUNE 500, is a leading provider of technology solutions for businesses, government agencies and educational institutions nationwide. CDW is a principal source of technology products and services from top name brands such as Cisco, Compaq, Computer Associates, Hewlett-Packard, IBM, Intel, Microsoft and Toshiba. CDW distributes contracts to end users for customized and standardized on-site services supplied directly by providers such as Compaq Global Services and DecisionOne and for training programs provided by firms such as KnowledgeNet and Productivity Point International CDW was founded in 1984 as a home-based business and today employs more than 2,800 coworkers whose efforts generated net sales of approximately $4 billion in 2001. CDW's direct model offers one-on-one relationships with highly trained account managers; purchasing by fax, telephone, the company's award-winning www.cdw.com Web site or customized CDW@work™ extranets; custom configured solutions and same day shipping; flexible financing solutions; and phone and online technical support, with more than 100 factory-trained and A+ certified technicians on staff.