Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW Primo Joins CDW As Chief Marketing Officer VERNON HILLS, Ill. - June 4, 2003 - CDW (Nasdaq: CDWC), today announced Diane Primo joined the company on Monday, June 2, 2003 as chief marketing officer and a member of the executive committee. She reports to chairman and CEO John Edwardson. Primo's experience spans more than 25 years of marketing with some of the Chicago area's leading companies. She has served as president of product marketing for SBC/Ameritech and business director, general manager and brand manager for brands of Quaker Oats. "Diane is a highly respected and dynamic marketer," Edwardson said. "She brings a wealth of experience to CDW. We are excited to have her on board and expect she will be instrumental in helping CDW grow market share." In this position, Primo is responsible for the strategy and development of CDW's advertising, product marketing, marketing intelligence and research, catalogs and collateral materials, creative services, relationship marketing, and corporate communications. Primo earned an M.B.A. from Harvard Business School and a B.A. from Smith College. She sits on the boards of the Chicago Sinfonietta and the Foundation for Independent & Higher Education and is an active member of the Chicago Network. About CDW CDW® (Nasdaq: CDWC), ranked No. 381 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 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 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 www.cdw.com Web site or customized CDW@work™ extranets; custom configured solutions and same day shipping; flexible financing solutions; and pre- and post-sales technical support, with more than 100 factory-trained and A+ certified technicians on staff.