Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW Completes Purchase Of Micro Warehouse Canadian Operations VERNON HILLS, Ill. - September 24, 2003 - CDW Corporation (Nasdaq: CDWC) today announced the company has completed the purchase of the operations of Micro Warehouse Canada Ltd., a Toronto-based reseller of computers, software and peripheral products. CDW, a leading supplier of technology products and services to business, government and education, closed the purchase September 23. Located in Toronto, the operation generated trailing twelve-month sales of approximately US$40 million and has approximately 100 coworkers. The agreement to purchase the operations of Micro Warehouse Canada, announced on September 8, 2003, was part of a transaction to acquire select North American assets of Micro Warehouse, a Connecticut-based reseller of computers, software and peripheral products. "The Canadian operation was an important reason we made this investment," said John A. Edwardson, Chairman and CEO, CDW. "As our first venture outside the United States, the Canadian operation expands our geographic reach. Long-standing customers in Canada will continue to be served by the same knowledgeable, professional sales team they know and trust. At the same time, we will look to grow the business, bringing more customers the right technology right away." 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 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.