Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW's Average Daily Sales Increase 31 Percent in February 2004 VERNON HILLS, Ill. - March 10, 2004 - CDW Corporation (Nasdaq: CDWC), a leading provider of technology products and services to business, government and education, today announced average daily sales for February 2004 were $20.9 million, an increase of 31.0 percent, versus average daily sales of $15.9 million for February 2003. Total sales for the month were $417.1 million compared with sales of $318.3 million for February 2003. Both months had 20 billing days. Corporate and public sector segments both generated strong double-digit growth in February 2004. In addition, double-digit unit volume growth was achieved in most product categories. Notebook CPUs, notebook accessories, desktop CPUs, server CPUs, data storage and printer accessories unit volumes increased more than 30 percent for the month on a year-over-year basis. "Our February results represent a strong continuation of the momentum we have achieved over the past several months," said John A. Edwardson, CDW's chairman and chief executive officer. "As we move forward in 2004, our company-wide focus remains squarely on gaining market share and improving productivity. The foundation of our success comes from the efforts of all our coworkers and our ability to provide customers with outstanding, time-saving customer service and an unmatched selection of brand-name products." The Company plans to announce March 2004 sales when it reports first quarter 2004 earnings in April 2004. Forward Looking Statement Any forward-looking statements contained in this release are based on the Company's beliefs and expectations as of the date of this release and are subject to certain risks and uncertainties which may have a significant impact on the Company's business, operating results or financial condition. Should any risk or uncertainty materialize, or should underlying assumptions prove incorrect, actual results or outcomes may vary materially from those described in forward-looking statements. Factors affecting the Company's business and prospects are discussed in the Company's filings with the Securities and Exchange Commission. About CDW CDW® (Nasdaq: CDWC), ranked No. 381 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.