BTG Standardizes on Siebel eBusiness Applications.

Business Editors/High-Tech Writers

SAN MATEO, Calif.--(BUSINESS WIRE)--Oct. 29, 2001

Single View of Customer Helps Pioneer in Innovative

Technologies Shorten Sales Cycle and Maximize Customer

Satisfaction and Loyalty

Siebel Systems, Inc. (Nasdaq:SEBL), the world's leading provider of eBusiness applications software, today announced that BTG (LSE:BGC), a global leader in technology commercialisation, has standardized on Siebel eBusiness Applications. By introducing a single view of the customer, BTG will significantly shorten its sales cycle and maximize customer service, satisfaction, and loyalty.

By deploying Siebel eBusiness Applications worldwide, including Siebel Sales and Siebel Marketing, BTG is creating a single, comprehensive view of its customers -- including its business partners as well as its technologies partners. This strategy will enable BTG to better respond to sales opportunities, conduct targeted marketing campaigns, efficiently manage global sales pipelines, and maximize customer satisfaction and loyalty.

"BTG is shaping the markets of tomorrow, and using the unrivalled functionality of Siebel eBusiness Applications, we have the potential to shorten sales cycles, increase productivity, and maximize customer satisfaction and loyalty," says Jon Inch, Global Vice-President, Information Technology and Knowledge Systems, BTG. "Siebel Systems' global eBusiness supremacy and vision, together with the scalability of the software, will enable BTG to exploit sales opportunities and sustain the company's long-term growth."

About BTG

BTG's business is finding, developing, and commercialising technologies that begin with innovation in a particular scientific or technical discipline. BTG creates value by investing in further technical development and enhancing the scope of the intellectual property. Finally, BTG captures value by either licensing the rights to the technology or by developing new business ventures. The company returns significant value to its sources of technology, its business partners, and its shareholders.

With headquarters in London and offices in Philadelphia and Tokyo, BTG capitalizes on a global network of contacts in companies, universities and research institutions to identify and commercialise the most promising technologies. Since being founded in 1949, BTG has commercialised such major innovations as magnetic resonance imaging (MRI), Interferon and wide-spectrum cephalosporin antibiotics.

BTG is quoted on the London Stock Exchange under the symbol "BGC." BTG's website www.btgplc.com includes information about its business and recent press releases. In the UK and USA respectively, BTG operates through wholly owned subsidiaries, BTG International Ltd. and BTG International Inc.

About Siebel Systems

Siebel Systems, Inc. (Nasdaq:SEBL) is the world's leading provider of eBusiness applications software. Siebel Systems provides an integrated family of eBusiness applications software, enabling multichannel sales, marketing, and customer service systems to be deployed over the Web, call centers, field, reseller channels, retail, and dealer networks. Siebel Systems' sales and service facilities are located in more than 37 countries. For more information, please visit Siebel Systems' Web site at www.siebel.com.

Except for the historical information contained herein, this press release contains forward-looking statements that involve risk or uncertainties. Future operating results of Siebel Systems may differ from the results discussed or forecasted in the forward-looking statements due to factors that include, but are not limited to, risks associated with customer relations, such as the availability of Siebel Systems' products and services, customer implementation of products and services, relationships with third-party vendors and systems integrators, concentration of revenues in a relatively small number of customers, existence of errors or defects in products, ability to successfully manage growth, significant current and expected additional competition and the need to continue to expand product distribution and services offerings. Further information on potential factors that could affect the financial results of Siebel Systems are included in Siebel Systems' Annual Report on Form 10-K for the year ended December 31, 1999 and its other filings with the Securities and Exchange Commission.

Note to Editors: Siebel is a trademark of Siebel Systems, Inc. and may be registered in certain jurisdictions. All other product and company names mentioned are the property of their respective owners and are mentioned for identification purposes only.