Press Release Details

Webcast Alert: The Thomson Corporation Presents at UBS 32nd Annual Media Week Conference - December 9, 2004

December 1, 2004 at 8:32 AM EST

STAMFORD, Conn. and TORONTO, Dec 1, 2004 /PRNewswire-FirstCall via COMTEX/ -- The Thomson Corporation (NYSE: TOC; TSX: TOC) announces the following Webcast:

    What:      Richard J. Harrington, President and CEO, will present at the
               UBS 32nd Annual Media Week Conference

    When:      December 9, 2004 @ 09:00 a.m. ET

    Where:     http://www.thomson.com

    How:       Live over the Internet -- To participate in the webcast, visit
               http://www.thomson.com and click on the "Investors" tab located
               at the top of the page.

    Contacts:  Frank Golden, Vice President, Investor Relations
               203-539-8470, frank.golden@thomson.com

               Jason Stewart, Vice President, Media Relations
               203-539-8339, jason.stewart@thomson.com

    The webcast will be archived at http://www.thomson.com .

The Thomson Corporation

The Thomson Corporation (http://www.thomson.com ), with 2003 revenues from continuing operations of $7.44 billion, is a global leader in providing integrated information solutions to business and professional customers. Thomson provides value-added information, software tools and applications 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. With operational headquarters in Stamford, Conn., Thomson has approximately 38,000 employees and provides services in approximately 130 countries. The Corporation's common shares are listed on the New York and Toronto stock exchanges (NYSE: TOC; TSX: TOC).

(Minimum Requirements to listen to broadcast:

The Windows Media Player software, downloadable free from http://www.microsoft.com/downloads/details.aspx?FamilyID=b446ae53-3759-40cf- 80d5-cde4bbe07999&displaylang=en and at least a 28.8Kbps connection to the Internet. If you experience problems listening to the broadcast, send an email to webcastsupport@tfprn.com.)

SOURCE The Thomson Corporation

Frank Golden, Vice President, Investor Relations,
+1-203-539-8470, frank.golden@thomson.com, or Jason Stewart, Vice President,
Media Relations, +1-203-539-8339, jason.stewart@thomson.com, both of The
Thomson Corporation
http://www.thomson.com