Investor Inquiries Cindy Klimstra Vice President, Investor Relations 847.968.0268 cklimstra@cdw.com Media Inquiries Gary Ross Sr. Manager, Corporate Communications 847.371.5048 garyross@cdw.com CDW's Sales Increase 6.8 Percent in February 2006 Company Launches Geographic Realignment of Corporate Sector VERNON HILLS, Ill. - March 9, 2006 - CDW Corporation (NASDAQ: CDWC), a leading provider of technology products and services to business, government and education, today announced February 2006 sales were $490.7 million, an increase of 6.8 percent compared to February 2005 sales of $459.6 million. Average daily sales for February 2006 were $24.533 million, an increase of 6.8 percent compared to average daily sales of $22.979 million for February 2005. There were 20 billing days in both February 2006 and February 2005. Both the corporate and public sector segments grew in February 2006, with the public sector segment achieving low double-digit growth and the corporate sector segment achieving growth in the mid-single digits. Product categories that achieved the strongest year-over-year unit volume growth for the month on an average daily basis included notebook CPUs, software, video, memory and input devices. As previously announced, the company is in the process of realigning its corporate sales organization to reflect the further segmentation of its corporate customer base by geographic region. Approximately 60,000 accounts will be affected, consisting of medium and large business customers with 100 or more employees. Small business customers with fewer than 100 employees in the corporate sector will not be affected. The public sector segment is also not affected, since state and local government, education and healthcare customers within the public sector are already segmented by geographic region. The initial rollout of the geographic realignment launched on March 1, 2006. Account managers with medium and large business accounts have retained their top accounts, while remaining customer accounts have been redistributed throughout the corporate sales organization based on five geographic regions. Expected advantages from the geographic realignment include the enhanced ability to serve customers, drive new business, maximize account coverage, and align geographically with our vendor and service partners. The Company believes the final stages of preparation to launch the geographic realignment, which occurred during February 2006, affected corporate sector sales growth in February 2006. The Company plans to announce March 2006 sales and first quarter earnings on Tuesday, April 25, 2006. March 2005 had 23 billing days and March 2006 will have 23 billing days. 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. 347 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 Adobe, APC, Apple, Cisco, HP, IBM, Lenovo, Microsoft, Sony, Symantec, Toshiba and ViewSonic. CDW was founded in 1984 and employs approximately 4,300 coworkers. In 2005, the company generated sales of $6.3 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 approximately 120 factory-trained and A+ certified technicians on staff.