ANN ARBOR, Michigan, June 12 /PRNewswire/ --

ProQuest, a Cambridge Information Group company, has signed an agreement
under which ProQuest would acquire the Thomson Reuters Dialog(R) business.
The transaction is expected to close pending a successful completion of the
formal consultation period and other customary closing conditions. Financial
terms of the transaction are not disclosed.

The acquisition of Dialog would allow ProQuest to deepen its penetration
in the corporate library and professional research markets with a valued
brand, authoritative content and precision search tools.

"Dialog is a highly respected source of information and a trusted brand
for libraries, so it is an exceptionally good fit in the ProQuest family,"
said ProQuest CEO Marty Kahn. "The companies' content and market strengths
complement each other and just as important is the match with our values --
we share a deep understanding of the library community and commitment to
serving it with high-quality information tools."

Dialog would continue to be an important distribution channel for Thomson
Reuters content after the transaction. Derwent World Patents Index (DWPI),
Investext, TrademarkScan, SciSearch(R) and BIOSIS are among the many
business-critical databases that will remain available through the Dialog
services.

"Both ProQuest and Thomson Reuters understand the valuable role of Dialog
in the information industry," said Mr. Kahn. "During this interim period, we
feel absolutely confident that Thomson Reuters will continue to provide
customers with the high level of support and service they have come to
expect."

Founded 40 years ago by Roger Summit, Dialog was the world's first online
information retrieval system to be used globally with commercially important
databases. Dialog online-based information services help organizations across
the globe to seek competitive advantages in such fields as business, science,
engineering, finance and law. The Dialog portfolio of products and services,
including Dialog(R) and DataStar(R), offers organizations the ability to
precisely retrieve data from more than 1.4 billion unique records of key
information, accessible via the Internet.

With direct operations in 27 countries, Dialog products and services are
a combination of highly accurate online research tools offering access to
unique and relevant databases designed to meet the specific needs of its wide
range of users. Information professionals and end-users within business,
professional and government organizations in more than 100 countries value
Dialog services to meet their searching needs.

ProQuest plans for the Dialog business include refreshing its platforms,
evolving them to meet the needs of today's information professional, as well
as exploring new products and renovating existing products. For more
information about the ProQuest family of information brands and products,
visit http://www.proquest.com.

About ProQuest

ProQuest provides seamless access to and navigation of more than 125
billion digital pages of the world's scholarship, delivering it to the
desktop and into the workflow of serious researchers in multiple fields, from
arts, literature, and social science to science, technology, and medicine.
ProQuest is part of Cambridge Information Group 
(http://www.cambridgeinformationgroup.com).

ProQuest's vast content pools are available to researchers through
libraries of all types and include the world's largest digital newspaper
archive, periodical databases comprising the output of more than 9,000 titles
and spanning more than 500 years, the pre-eminent dissertation collection,
and various other scholarly collections. Users access the information through
the ProQuest(R) and CSA Illumina(TM) online information systems,
Chadwyck-Healey(TM) electronic and microform resources, UMI(R) microform
and print reference products, eLibrary(R) and SIRS(R) educational resources,
Ulrich's(R) Serials Analysis System, COS Scholar Universe, and Serials
Solutions(R) resource management tools. Through the expertise of business
units Serials Solutions and RefWorks/COS, ProQuest provides technological
tools that allow researchers and libraries to better manage and use their
information resources.

For more information, visit http://www.proquest.com,
http://www.proquest.co.uk, and http://www.csa.com.

Web site: http://www.proquest.com
              http://www.proquest.co.uk
              http://www.csa.com
              http://www.cambridgeinformationgroup.com