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At IDT/NET Paris: Dialog Celebrates 30 Years of Information Excellence

Company to demonstrate recently launched services

PARIS — June 4, 2002 — Dialog, a Thomson (TSX:TOC) business and a leading worldwide provider of online-based information services and integrated information solutions long active in Europe, said today that it will use its participation at the 19th Annual IDT/Net exhibition, France's premier information industry event, to mark the 30th anniversary of the company's founding.

The anniversary commemorates the company's role as a pioneer in the online information industry and its standing today as an innovative, customer-focused and technologically sophisticated leader of unrivalled breadth and depth.

Among the new products and services Dialog (stand B-01) will be demonstrating at the show are:

• NewsRoom - an online database that combines 6,500 continually updated news sources. NewsRoom includes broadcast transcripts, newspapers, periodicals, newswires, trade and scholarly journals and other content sources in eight languages from nearly 80 countries.



• Expanded e-journal linking features — this allows users of Dialog® to link seamlessly to the full text of more than 8,000 scientific, medical and technical e-journals published by more than 40 leading scientific publishers and information aggregators.



• Improvements to DataStar™ for Private File Hosting service — this enables corporate subscribers to DataStar™Web to upload retrieved articles and reports for integration with other information, such as in-house research and analysis.

"Since its creation in 1972, Dialog has pursued excellence in its products and services," said Ciaran Morton, president of Dialog's Europe, Middle East and Africa (EMEA) operations. "Dialog recently acquired two other leading information service providers, NewsEdge and Intelligence Data, which will be appearing on our stand at IDT. We are also happy that Westlaw International, another Thomson company, will be joining us."

- Ends -

About Dialog
Founded in 1972 by Dr. Roger K. Summit, a pioneer in developing the technology behind electronic information retrieval, Dialog is the world leader in providing online-based information services to organizations seeking competitive advantages in such fields as business, science, engineering, finance and law.

Today, Dialog's three online platforms — Dialog®, Profound® and DataStar ™ — offer users the ability to precisely retrieve data from more than 1.2 billion unique records, accessible via the Internet or through delivery to enterprise intranets. The content available ranges from articles and reports published in thousands of publications to in-depth repositories of patents, trademarks and other intellectual property data.

Corporate librarians, knowledge managers and other information professionals at more than 25,000 business, professional and government organizations in more than 100 countries prize Dialog services for their breadth and depth of content, precision searching and speed.

Headquartered in Cary, N.C., USA, with direct operations in 32 countries throughout North American, Latin America, Europe, the Middle East, South Africa and the Asia Pacific, Dialog is a business of The Thomson Corporation. For more information about Dialog, please visit www.dialog.com. or call Dialog's London office at +44 (0) 207-940-6900.

About The Thomson Corporation
The Thomson Corporation (www.thomson.com), with 2001 revenues of US$7.2 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software applications and tools to more than 20 million users in the fields of law, tax, accounting, financial services, higher education, reference information, corporate training and assessment, scientific research and healthcare. The Corporation's common shares are listed on the Toronto Stock Exchange (TSX: TOC).

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