EXHIBIT 99.1    


                  [THE DIALOG CORPORATION PLC LETTERHEAD]

 News Announcement 
 For Immediate Release 

                         DIALOG CORPORATION CHANGES
                  NASDAQ NATIONAL MARKET SYMBOL TO "DIAL"

                         - CHANGE EFFECTIVE TODAY -

 Cary, NC and London, England - April 27, 1999: The Dialog Corporation plc
 ("Dialog") (NASDAQ:DIAL; LSE:DLG), a leading provider of Internet-based
 information, technology and eCommerce solutions to the corporate market,
 today announced that effective with the commencement of Nasdaq trading
 today, Tuesday, April 27th, the Company's Nasdaq National Market trading
 symbol has changed to "DIAL" from "DIALY."

 The symbol change is in keeping with recent revisions in Nasdaq's trading
 symbol procedures for foreign-based companies. Dialog requested the change
 in order to simplify trading and obtaining stock quotations as well as to
 more closely align Dialog's trading symbol with the four-letter symbols of
 the majority of Nasdaq National Market-traded companies.

 THE DIALOG CORPORATION PLC 

 The Dialog Corporation plc (http://www.dialog.com) is a leading provider
 of Internet-based information, technology and eCommerce solutions to the
 corporate market, created by the merger of M.A.I.D plc and Knight-Ridder
 Information Inc. Dialog provides a range of technologies and services for
 Internet and intranet-based knowledge management and eCommerce
 applications. The company's InfoSort indexing technology is widely
 perceived to offer an industry standard for information categorisation,
 while the DIALOG, DataStar and Profound range of products and services
 provide comprehensive, authoritative sources of information to
 professionals worldwide. The Dialog Corporation has world headquarters in
 London and US headquarters in Cary, NC. Its American Depositary Shares
 (ADS) are traded on NASDAQ under the symbol "DIAL" with four Ordinary
 Shares comprising one ADS; its Ordinary Shares trade on the London Stock
 Exchange under the symbol "DLG."

 CONTACTS: 

 Kristian Talvitie, U.S. Investor Relations   kristian_talvitie@dialog.com 
 212/381-1824 

 Julia Morton, U.K. Investor Relations        julia_morton@dialog.com 
 011-44-171-930-6900 

 Tracey Johnston, Corporate PR Manager        tracey_johnston@dialog.com 
 011-44-171-930-6900 

 David C. Collins/Robert L. Rinderman           dial@jcir.com 
 Jaffoni & Collins Incorporated 
 212/835-8500 

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