Investor Inquiries
Cindy Klimstra
847-968-0268
cklimstra@cdw.com
Media Inquiries
Gary Ross
847-371-5048
garyross@cdw.com


CDW to Release Second Quarter Results on July 19, 2005

VERNON HILLS, Ill –July 12, 2005 - CDW Corporation (NASDAQ: CDWC) will release its second quarter 2005 results and June 2005 sales results on Tuesday, July 19, 2005, at 7:30 a.m. ET / 6:30 a.m. CT. On July 19, 2005, at 8:30 a.m. ET / 7:30 a.m. CT, management will review these results during a conference call. This conference call will be available via live webcast in listen-only mode on the Company's web site at CDW.com. An audio replay of the call will be available approximately two hours after the event on CDW.com 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, Microsoft, Sony, Symantec, Toshiba and ViewSonic.

CDW was founded in 1984 and today employs approximately 4,000 coworkers. In 2004, the company generated sales of approximately $5.7 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 120 factory-trained and A+ certified technicians on staff.

Additional information can be found by visiting CDW.com.