Please direct your media and public relations inquiries to: mediarelations@cdw.com 800-800-4CDW ADP Teams With CDW and Compaq to Provide Clients with Affordable, Pre-Configured PC Solutions Agreement Helps Provide Efficient Implementation And Value-added Client Service ROSELAND, NJ, September 14, 1998 — Automatic Data Processing, Inc. (ADP®), the world's leading provider of integrated human resources, benefits and payroll services, today announced a strategic agreement with CDW Computer Centers, Inc., one of the country's largest and fastest growing direct marketers of brand name computer products, and Compaq Computer Corporation, the world's largest computer manufacturer, to offer clients affordable, state-of-the-art hardware solutions, preconfigured with ADP PC/Payroll for Windows™ an easy to use payroll and human resource management software system - providing clients with unparalled service. "We are committed to providing our clients with innovative solutions that make the implementation process for ADP PC/Payroll for Windows as efficient as possible," said George Stoeckert, President, ADP Major Accounts Division. "Our agreement with CDW and Compaq enables our clients to purchase quality, reliable hardware specifically configured for optimal performance of ADP PC/Payroll for Windows, while utilizing CDW's technical expertise at a competitive market price." To make the implementation process as efficient as possible, CDW will deliver ADP PC/Payroll for Windows pre-loaded on Compaq PC systems directly to ADP clients. Before purchasing hardware, clients can consult with CDW experts to custom configure systems based on their individual business application needs. CDW has established a toll free service number - 800-380-4239 - dedicated to handle requests and technical inquiries from ADP clients. Callers will receive personal service from a dedicated CDW account manager. "This marks the first time we have formed an alliance with an HR/payroll solution provider," said CDW President Greg Zeman. "ADP's clients will benefit from the combination of Compaq's industry-leading hardware, CDW's technological support and ADP's product assistance. This value-added service will significantly enhance the efficiency of system setup and upgrades." The ADP, CDW and Compaq agreement provides clients with three customized PC system offerings at special prices. Each package includes options that are available to meet client's specific performance requirements. As the availability of PC offerings continues to evolve and change, ADP, CDW and Compaq will work together to provide new configurations similar in scope and price. As an added-value to ADP clients, financing is available through ADP Credit Corporation. Clients receive pre-approved credit and monthly payments are debited directly into their account. "Our agreement with a leading information services provider such as ADP places Compaq in a unique situation," said Mike Pocock, Vice President, Compaq Channel Management, North America Division. "By providing ADP with a range of PC solution options that meets its clients business needs, we will be able to significantly broaden our market reach." About CDW CDW Computer Centers, Inc. (NASDAQ: CDWC), a Fortune 1000 company, is one of the country's largest and fastest growing direct marketers of microcomputer products, providing customized solutions and support to business and consumer customers nationwide. Founded in 1984, CDW today boasts more than 1,400 coworkers whose efforts resulted in net sales that topped $1.4 billion for the trailing twelve months ended June 30, 1998. The No. 1 direct reseller for Compaq, Microsoft and other brand name computer products, CDW offers more than 30,000 microcomputer products to business, government, educational, institutional and home office users in the United States. With lifetime technical support and other industry leading service capabilities, CDW prides itself on providing unparalleled support, solutions and customer service. With more than 50 factory-trained and certified technicians on staff, CDW provides customized solutions, completing more than 3,000 custom configurations each week, free of charge. More information About CDW is available on the company's award-winning Web site, www.cdw.com, or by calling 800-671-4239. ABOUT COMPAQ Compaq Computer Corporation, the world's largest computer manufacturer, is a Fortune Global 200 company and the largest global supplier of personal computers. Founded in 1982, Compaq develops and markets hardware, software, solutions and services, including industry-leading enterprise computing solutions, fault-tolerant business-critical solutions, networking and communication products, commercial desktop and portable products and consumer PCs. The Company is a leader in environmental friendly programs and business practices. Compaq products are sold and supported in more than 100 countries through a network of authorized Compaq marketing partners. Customer support and information about Compaq and its products are available at www.compaq.com or by calling 1-800-OK-COMPAQ. Product information and reseller locations are available by calling 1-800-345-1518. ABOUT ADP ADP (NYSE:AUD), with more than $4 billion in annual revenues and more than 425,000 clients, is one of the largest independent computing services firms in the world. Founded in 1949, ADP provides computerized transaction processing, data communications, software, and information services in virtually every industry. ADP Employer Services is the world's largest provider of payroll services and human resource information systems (HRIS). It offers a comprehensive range of benefits, payroll and business tax deposit and reporting, time and attendance, 401(k) record keeping and unemployment compensation management services. In addition, ADP provides securities transaction processing and investor communications services to the brokerage and financial communities, industry-specific computing and consulting services to auto and truck dealers and computerized automated auto-repair estimating and auto parts availability services to the auto-repair industry. Further information about the agreement can be found on the ADP Web site, www.adp.com/ma.