Press Release Details

Webcast Alert: The Thomson Corporation Presents at the Morgan Stanley Tenth Annual Media & Communications Conference

May 5, 2005 at 5:20 PM EDT

STAMFORD, Conn. and TORONTO, May 5 /PRNewswire-FirstCall/ -- The Thomson Corporation (NYSE: TOC; TSX: TOC) announces the following Webcast:

    (Logo:  http://www.newscom.com/cgi-bin/prnh/20020227/NYW014LOGO )

    What:  Robert D. Daleo, Chief Financial Officer, will present at the
           Morgan Stanley Tenth Annual Media & Communications Conference

    When:  May 6, 2005 @ 10:30 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 Investors Relations at the top
           of the page, and then Executive Presentations at the left side of
           the page.

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

    The Thomson Corporation

The Thomson Corporation (http://www.thomson.com), with 2004 revenues of $8.10 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 e-learning and assessment, scientific research and healthcare. With operational headquarters in Stamford, Conn., Thomson has approximately 40,000 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/windows/windowsmedia/EN/default.asp 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
    -0-                             05/05/2005
    /CONTACT:  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/
    /Photo:  http://www.newscom.com/cgi-bin/prnh/20020227/NYW014LOGO /
    /Web site:  http://www.thomson.com /
    (TOC TOC.)

CO:  Thomson Corporation
ST:  Connecticut
IN:  PUB FIN
SU:  TDS CCA

AA
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5651 05/05/2005 17:18 EDT http://www.prnewswire.com