ADVISORY/ATG and American Airlines to Co-Present on J2EE Development at JavaOne Conference.

Business Editors/High-Tech Writers

ADVISORY...for Tuesday (June 10)

JavaOne 2003

Booth 612

SAN FRANCISCO--(BUSINESS WIRE)--June 9, 2003

As a centerpiece to its activities at the 2003 JavaOne conference, ATG (Art Technology Group, Inc., Nasdaq: ARTG) announced today that it will give a co-presentation on J2EE development along with customer American Airlines on Tuesday, June 10 from 6-7 p.m. PDT.

Joseph Vigneau, software engineer, ATG, and Jason Goth, managing architect for customer technology, American Airlines, will present "Inside AA.com: Mastering Large-Scale J2EE Application Development and Deployment." The presentation will give JavaOne attendees a rare peek inside one of the most demanding, mission-critical commercial applications ever built with J2EE - American Airlines' Web site, AA.com.

             What:    Inside AA.com: Mastering Large-Scale J2EE
                      Application Development and Deployment
             When:    Tuesday, June 10, 6:00 p.m.- 7:00 p.m. PDT
             Where:   Esplanade 304, Moscone Center, San Francisco

About ATG

ATG (Art Technology Group, Inc.) is a leading provider of innovative software applications for commerce and customer self-service. Customers around the globe rely on ATG for frontline applications that enhance and improve the entire customer lifecycle experience. Deployed on the industry's most popular application servers, ATG's application suites for e-commerce, portals, and relationship management are ideal for integrating online initiatives across the enterprise.

ATG has delivered online solutions to blue-chip companies worldwide including Aetna Services, Alcatel, American Airlines, Barclays Global Investors, Best Buy, BMG Direct, Eastman Kodak, Ford Motor Credit, HSBC, J.Crew, Sun Microsystems, Walgreens, and WellsFargo. The company is headquartered in Cambridge, Massachusetts, with additional locations throughout North America, Europe, and Asia. For more information about ATG, please visit our Web site at www.atg.com.

(C) 2003. ATG and Art Technology Group are registered trademarks of Art Technology Group, Inc. All other product names, service marks, and trademarks mentioned herein are trademarks of their respective owners.