Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW CDW to Release First Quarter Results on April 15, 2003 VERNON HILLS, Ill. - March 31, 2003 - CDW Computer Centers, Inc. (Nasdaq: CDWC) will release its first quarter 2003 results on Tuesday, April 15, 2003 at 4:30 p.m. Eastern Daylight Time (EDT). On April 15, 2003 at 5:00 p.m. EDT, management will review these results during a conference call. This conference call will be available via live Webcast – in listen-mode only – on the Company's Web site at CDW.com and through streetevents.com. An audio replay of the call will be available approximately two hours after the event on streetevents.com until April 31, 2003. About CDW CDW® (Nasdaq: CDWC), ranked No. 414 on the Fortune 500, is a leading provider of technology solutions for businesses, government agencies and educational institutions nationwide. CDW is a principal source of technology products and services including top name brands such as Cisco, Computer Associates, HP, IBM, Intel, Microsoft, and Toshiba. 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 2,900 coworkers whose efforts generated net sales of greater than $4 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 www.cdw.com Web site or customized CDW@work™ extranets; custom configured solutions and same day shipping; flexible financing solutions; and pre- and post-sales technical support, with more than 100 factory-trained and A+ certified technicians on staff.