Interactive Data and TCS Deliver Wireless Real-Time Global Financial M

    Business Editors/Telecommunications Writers

    LONDON & ANNAPOLIS, Md.--(BUSINESS WIRE)--May 9, 2005--TeleCommunication Systems, Ltd., a European subsidiary of TeleCommunication Systems Inc. (TCS) (NASDAQ: TSYS), a global leader in wireless data technology, has enhanced its marketStream(TM) service with the assistance of ComStock, an Interactive Data company (NYSE: IDC) and a leading provider of real-time global market data.
    TCS' marketStream now incorporates ComStock's high-speed digital data feed, XpressFeed. Tailored for financial institutions and online services, XpressFeed carries real-time content from more than 350 global sources and exchanges, and covers more than two million financial instruments. XpressFeed offers extensive coverage of Europe, the U.S., Asia Pacific, Latin America, South America and Africa. It includes data coverage on equities, options, market depth, ECN data, corporate bonds, futures, mutual funds, money markets, fixed income data and foreign exchange data.
    Gregg Smith, Senior Vice President of the Enterprise Division for TCS, commented, "In today's demanding financial markets, traders expect a second-to-none service with no margin for error.
    We provide the financial industry with a uniform global solution thanks to the source data that ComStock provides TCS. marketStream users are now able to track global market movements, regardless of where they are."
    ComStock's European managing director, Mark Hepsworth, said, "We're delighted that TCS incorporates our extensive range of market data content in its mobile financial information offerings for users in Europe. ComStock, as part of Interactive Data, provides a vast range of financial information to the global financial community. Our real-time data feed can be used to power trading and portfolio management applications, Internet and intranet sites, as well as customized market data applications."
    Totally wireless and with global coverage, marketStream utilizes Global Packet Radio Service (GPRS) and the high-speed data network capabilities of Global System for Mobile Communications (GSM), Code Division Multiple Access / (1x) radio transmission technology (CDMA/1xRTT), Integrated Dispatch Enhanced Network (iDEN) carriers and 3rd-generation networks to stream market data to any Java-enabled mobile device, on virtually any network, in any institution. Multi-national financial organizations can now enable their marketStream users to have global access to streaming equities, foreign exchange rates, futures, commodities and fixed-income prices, as well as news and charts via their mobile phone, PDA, or Blackberry(TM).

    ABOUT INTERACTIVE DATA

    Interactive Data Corporation (NYSE: IDC) is a leading global provider of securities pricing, financial information and analytic tools to institutional and individual investors. The company supplies time-sensitive pricing (including evaluated pricing), dividend, corporate action and descriptive information for more than 3.5 million securities traded around the world, including hard-to-value instruments. Many of the world's best-known financial service and software companies subscribe to the company's services in support of their trading, analysis, portfolio management and valuation activities.
    Interactive Data is headquartered in Bedford, Massachusetts. Through its branded businesses, FT Interactive Data, ComStock, CMS BondEdge and eSignal, Interactive Data has approximately 1,800 employees in offices located throughout North America, Europe, Asia and Australia. Pearson plc (NYSE: PSO; LSE: PSON), an international media company whose businesses include the Financial Times Group, Pearson Education and the Penguin Group, owns approximately 60 percent of the outstanding common stock of Interactive Data Corporation.
    ComStock, an Interactive Data company, is a leading provider of real-time global financial information to financial institutions, financial information redistributors and online media portals worldwide. ComStock's suite of services ranges from a real-time datafeed, to fully customized and hosted market data solutions.

    ABOUT TELECOMMUNICATION SYSTEMS. INC AND TELECOMMUNICATION SYSTEMS, LTD.

    TeleCommunication Systems, Inc. (TCS) (NASDAQ:TSYS) is a leading provider of mission critical wireless data solutions to carriers, enterprise and government customers. TCS' wireless data offerings include location-based Enhanced 9-1-1 services, and messaging and location service infrastructure for wireless operators, real-time market data and alerts to financial institutions, mobile asset management and mobile office solutions for enterprises, and encrypted satellite communications to government customers. For more information visit www.telecomsys.com.
    TeleCommunication Systems, LTD, a European subsidiary of TeleCommunication Systems, Inc., is the leader in providing mission-critical financial data to mobile professionals throughout Europe.
    For more information about marketStream visit www.marketstreamlive.com.

    This announcement contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended. These statements are based upon TCS' current expectations and assumptions that are subject to a number of risks and uncertainties that would cause actual results to differ materially from those anticipated.
    The actual results realized by TCS could differ materially from the statements made herein, depending in particular upon the risks and uncertainties described in TCS' filings with the Securities and Exchange Commission (SEC). These include without limitation risks and uncertainties relating to TCS' technology performance and marketing success in deploying marketStream service in markets around the world.
    Existing and prospective investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. TCS undertakes no obligation to update or revise the information in this press release, whether as a result of new information, future events or circumstances, or otherwise.

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CONTACT: Interactive Data Sue Mitchell, +44-0-20-7825-8076 sue.mitchell@interactivedata.com or TeleCommunication Systems Rita Thompson, 410-295-1865 rthompson@telecomsys.com

KEYWORD: MARYLAND UNITED KINGDOM INTERNATIONAL EUROPE INDUSTRY KEYWORD: HARDWARE TELECOMMUNICATIONS SOFTWARE NETWORKING PRODUCT SOURCE: TeleCommunication Systems, Ltd.

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