Investor Inquiries Cindy Klimstra Vice President, Investor Relations (847) 968-0268   CDW Corporation to Present at Baird's 2007 Growth Stock Conference VERNON HILLS, Ill. - May 3, 2007 - 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 on Wednesday, May 9, 2007, at Baird's 2007 Growth Stock Conference, Four Seasons Hotel, Chicago, Illinois. Representing the company will be John A. Edwardson, chairman and chief executive officer of CDW Corporation. The presentation can be accessed via live audio webcast at www.cdw.com/investor. The live webcast will begin at 3:30 pm ET / 2:30 pm. CT and will replay for approximately two weeks. About CDW CDW®, ranked No. 342 on the FORTUNE 500, is a leading provider of technology solutions for business, government and education. CDW is a principal source of technology products and services including top name brands such as Acer, Adobe, APC, Apple, Cisco, Fujitsu, HP, IBM, Lenovo, Microsoft, Panasonic, Quantum, Samsung, Sony, Symantec and ViewSonic. CDW's direct model offers customers one-on-one relationships with knowledgeable account managers and access to approximately 820 on-staff engineers and advanced technology specialists who customize solutions for customers' complex technology needs. CDW also provides same-day product shipping and post-sales technical support. CDW was founded in 1984 and employs approximately 5,640 coworkers. In 2006, the company generated sales of $6.8 billion. For more information, visit CDW.com. For more information about CDW: Visit CDW on the Internet at http://www.cdw.com. Contact CDW Investor Relations via the Internet at investorrelations@cdw.com or by telephone at 847-419-6328.