Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW Names Cindy T. Klimstra Director of Investor Relations VERNON HILLS, Ill. - October 7, 2003 - CDW Corporation (Nasdaq: CDWC) today announced that Cindy T. Klimstra has joined the company as director of investor relations. In this position, Cindy will manage all investor relations activities for CDW. "Cindy's experience in investor relations and in marketing will benefit CDW as the company continues to grow," said Barbara A. Klein, senior vice president and chief financial officer for CDW. "We are pleased to welcome Cindy to our team." Klimstra reports to Klein. As director of investor relations, Klimstra is replacing Anne B. Ireland, who is moving to a new role as senior director of marketing operations at CDW. Prior to joining CDW, Klimstra served as assistant vice president of investor relations at Cobalt Corporation. She has previously held positions in investor relations at other public companies, including First Industrial Realty Trust, Inc. and Chicago Northwestern Railway Co. Klimstra holds a bachelor's degree from the University of Wyoming and an MBA from Northwestern University. About CDW CDW® (Nasdaq: CDWC), ranked No. 381 on the FORTUNE 500, is a leading provider of technology products and services for businesses, government and education. CDW is a principal source of technology including 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 over 3,000 coworkers whose efforts generated net sales of more than $4.2 billion in 2002. 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 or customized CDW@work™ extranets; 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.