Investor Inquiries Cindy Klimstra Vice President, Investor Relations 847.968.0268   CDW Corporation to Present at March Investor Conferences VERNON HILLS, Ill. - March 1, 2006 - CDW Corporation (NASDAQ: CDWC), a leading provider of technology products and services to business, government and education, today announced that the company is scheduled to present at the following conferences: Monday, March 6, 2006 Raymond James 27th Annual Institutional Investors Conference Hyatt Regency Grand Cypress, Orlando, Florida Barbara A. Klein, senior vice president and chief financial officer 9:15 a.m. ET (8:15 a.m. CT / 6:15 a.m. PT) Wednesday, March 8, 2006 The Fifth Annual JMP Securities Research Conference The Ritz-Carlton, San Francisco, California James R. Shanks, executive vice president - sales Barbara A. Klein, senior vice president and chief financial officer 7:25 p.m. ET (6:25 p.m. CT / 4:25 p.m. PT) The presentations can be accessed via live audio webcast at www.cdw.com/investor and replays will be available shortly there after for approximately two weeks. 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.