Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW Corporation to Present at Raymond James IT Supply Chain Conference VERNON HILLS, Ill. - December 6, 2004 - CDW Corporation (NASDAQ: CDWC), a leading provider of technology products and services to business, government and education, today announced that the company is scheduled to present to investors on Thursday, December 9, 2004, at the Raymond James IT Supply Chain Conference, InterContinental The Barclay Hotel, New York, N.Y. Representing the company will be John A. Edwardson, chairman and chief executive officer, and Barbara A. Klein, senior vice president and chief financial officer of CDW Corporation. The presentation can be accessed via live audio webcast at www.cdw.com/investor. The live webcast will begin at 1:30 p.m. ET / 12:30 p.m. CT and will replay for approximately two weeks. About CDW CDW® (Nasdaq: CDWC), ranked No. 376 on the FORTUNE 500, is a leading provider of technology products and services for business, government and education. CDW is a principal source of technology from top name brands such as APC, Apple, Cisco, HP, IBM, Microsoft, Sony, Symantec, Toshiba and ViewSonic. CDW distributes contracts to end users for customized and standardized on-site services supplied directly by providers such as HP Services and Unisys 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 approximately 3,700 coworkers. In 2003, the company generated net sales of approximately $4.7 billion. CDW's direct model offers one-on-one relationships with knowledgeable account managers; purchasing by telephone, fax, the company's award-winning CDW.com Web site, customized CDW@work™ extranets, CDWG.com Web site and macwarehouse.com Web site; custom configured solutions and same day shipping; and pre- and post-sales technical support, with more than 100 factory-trained and A+ certified technicians on staff. Additional information can be found by visiting CDW.com.