Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW Announces November Sales VERNON HILLS, Ill. - December 11, 2003 - CDW Corporation (Nasdaq: CDWC), a leading provider of technology products and services to business, government, and education, today announced sales for November 2003 of $382.1 million, an increase of 22.9 percent compared with sales of $311.0 million for November 2002. Average daily sales for November 2003 were $20.111 million, an increase of 29.3 percent versus average daily sales of $15.550 million for November 2002. November 2003 had 19 billing days and November 2002 had 20 billing days. The November 2003 sales include sales made by former members of the Micro Warehouse sales force who joined CDW in September in conjunction with the Micro Warehouse transactions. Double-digit unit volume growth was achieved in most product categories. Notebook, server CPU, data storage, and printer unit volumes increased more than 25 percent for the month on a year-over-year basis. "We are very pleased with sales for the month of November," said John A. Edwardson, CDW's chairman and chief executive officer. "Both our corporate and public sector segments experienced strong double-digit growth. We are certainly encouraged by these growth rates." The Company plans to announce December 2003 sales when it reports fourth quarter 2003 earnings in January 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.