EXHIBIT 99.1
  
                  [THE DIALOG CORPORATION PLC LETTERHEAD]
  
 News Announcement 
 For Immediate Release 
  
                        THE DIALOG CORPORATION PLC;
                           GROUP PROGRESS REPORT
  
        Cary, N.C. and London -- May 17, 1999-- The Dialog Corporation plc
 (NASDAQ: DIAL; LSE: DLG), a leading provider of Internet-based information,
 technology and eCommerce solutions to the corporate market, today updated
 the investment community concerning strategic initiatives and a new finance
 facility from The Chase Manhattan Bank. 
  
 Strategic Initiatives 
  
      As indicated in the 1998 fourth quarter statement, Dialog continues to
 pursue a number of strategic initiatives, which the Board anticipates would
 serve to enhance shareholder value and result in a substantial reduction of
 corporate debt. Negotiations progress satisfactorily, and the Board expects
 to be in a position to make a further announcement in due course. 
  
 1999 First Quarter Trading 
  
      Operating progress in the first quarter of 1999 has been consistent
 with market expectations and in line with the outlook reported at the time
 of the 1998 fourth quarter statement in March 1999. The Board expects the 
 announcement regarding the first quarter results to be made at the end of
 May 1999. 
  
 Financing Market Opportunities 
  
      A new facility from The Chase Manhattan Bank has enabled the release
 of funds previously earmarked for debt repayments to be invested in the
 high growth market opportunities of Information Services, Web Solutions and
 eCommerce. 
  
      Dialog is actively engaged in discussions which, subject to their
 outcome, will result in a substantial reduction of Dialog debt. 
  
      The Board has appointed The Chase Manhattan Bank as joint advisors to
 support the Group in these initiatives. 
  
 The Chase Manhattan Bank 
  
      Dialog and its Senior Lenders have amended the terms of the Senior
 Credit Facility so that in addition to the Company making its scheduled
 principal and interest payments falling due in May, the Company has also
 prepaid a portion of the Senior Debt repayment due in November 1999.
 Additionally, Dialog increased the size of the Senior Debt Facility by a
 net $11.5 million through a new $25 million medium term loan due in October
 2002 provided by The Chase Manhattan Bank. The Chase Manhattan Bank and its
 affiliates were the lead managers for both the senior and high yield debt
 required to finance the acquisition of Knight Ridder Information, Inc.  
  
      In connection with this incremental financing, Dialog has agreed to
 issue to The Chase Manhattan Bank warrants to purchase an initial 1.5
 million new Ordinary shares of Dialog (representing approximately 1 percent
 of the current issued share capital of Dialog) exercisable between now and
 October 11, 2002, together with additional warrants to purchase up to a
 maximum of a further 1.5 million new Ordinary shares between August 1 and
 November 1, 1999 if the term facility is still outstanding on those dates,
 such warrants to be exercisable up to May 14, 2004. The warrants are
 exercisable at a price of 120.5 pence per Dialog ordinary share (the
 closing mid-market price on May  13, 1999; ADS equivalent - $7 3/4). 
  
 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 categorization,
 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." 
  
      This press release contains forward-looking statements within the
 meaning of Section 27A of the Securities Act of 1933 and Section 21E of the
 Securities Exchange Act of 1934, which are subject to the "safe harbor"
 created by those sections.  The forward-looking statements can be
 identified by terminology such as "may," "will," "expect," "intend,"
 "estimate," "anticipate," "inevitable," "believe" or "continue" or
 variations thereon, and include, among others, the launch dates of the
 Company's products noted above.  The Company's actual results could differ
 materially from those discussed in the forward-looking statements as a
 result of certain factors, including, among others, those set forth under
 the caption "Risk Factors" in the Company's most recent Report on Form 20-F
 or generally in the Company's Reports on Form 6-K.  The Company disclaims
 any obligation to update these forward-looking statements as a result of
 subsequent events. 
  
 CONTACT:  The Dialog Corporation plc 
           David Mattey, Chief Financial Officer 
           011 44 171 930 6900 
                 or 
           Kristian Talvitie, Head of  US Investor Relations 
           (212) 381 1824 
           kristian_talvitie@dialog.com 
  
           Jaffoni & Collins (for Dialog) 
           David Collins 
           Robert Rinderman 
           (212) 835-8500 
           dial@jcir.com