Mercury Computer Systems logo. (PRNewsFoto) CHELMSFORD, MA USA 07/18/2005

 Acquisition Expected to Accelerate Growth for Defense and Commercial Signal
                              Processing Markets

    CHELMSFORD, Mass., Aug. 31 /PRNewswire-FirstCall/ -- Mercury Computer
Systems, Inc. (NASDAQ: MRCY), announced that it has completed the previously
announced acquisition of Echotek Corporation for approximately $49 million,
payable in a combination of cash and shares of Mercury common stock, with such
stock representing approximately 10 percent of the total purchase price. Based
in Huntsville, Alabama, Echotek is a market leader in the development of data
acquisition products.

    About Mercury Computer Systems, Inc.
    Mercury Computer Systems, Inc. (NASDAQ: MRCY) is the leading provider of
high-performance embedded, real-time digital signal and image processing
computer systems. Mercury's products play a critical role in a wide range of
applications, transforming sensor data to information for analysis and
interpretation. In military reconnaissance and surveillance platforms the
Company's systems process real-time radar, sonar, and signals intelligence
data. Mercury's systems are also used in state-of-the-art medical diagnostic
imaging devices including MRI, PET, and digital X-ray, and in semiconductor
imaging applications including photomask generation and wafer inspection.
Mercury provides advanced 3D image processing and visualization software and
optimized systems to diverse end markets including life sciences, geosciences,
and simulation. The Company also provides radio frequency (RF) products for
enhanced communications capabilities in military and commercial applications.
    Based in Chelmsford, Massachusetts, Mercury serves customers in North
America, Europe and Asia through its direct sales force and a network of
subsidiaries and distributors. Visit Mercury on the web at http://www.mc.com/.
    Forward-Looking Safe Harbor Statement
    This press release contains certain forward-looking statements, as that
term is defined in the Private Securities Litigation Reform Act of 1995,
including those relating to the anticipated effects of the acquisition and
subsequent integration of Echotek Corporation. You can identify these
statements by our use of the words "may," "will," "should," "plans,"
"expects," "anticipates," "continue," "estimate," "project," "intend," and
similar expressions. These forward-looking statements involve risks and
uncertainties that could cause actual results to differ materially from those
projected or anticipated. Such risks and uncertainties include, but are not
limited to, the failure to satisfy closing conditions or otherwise; the
challenges of achieving expected synergies and integrating Echotek Corporation
with Mercury's business; the ability to retain key employees and customers;
difficulties or delays in developing products and solutions; changes in
technology and the ability to deliver technological innovations; market
acceptance of Mercury's products; the ability to protect Mercury's
intellectual property rights; and economic conditions in Mercury's and Echotek
Corporation's markets, including defense and commercial signal processing,
software radio, medical scanners, physics experimentation, and electronic test
instrumentation. These risks and uncertainties also include such additional
risk factors as are discussed in Mercury's recent filings with the U.S.
Securities and Exchange Commission, including its Quarterly Report on Form 10-
Q for the fiscal quarter ended March 31, 2005. The Company cautions readers
not to place undue reliance upon any such forward-looking statements, which
speak only as of the date made. The Company undertakes no obligation to update
any forward-looking statement to reflect events or circumstances after the
date on which such statement is made.

     Contact:
     Kathy Donahue, Public Relations Manager
     Mercury Computer Systems, Inc.
     978-967-1126/kdonahue@mc.com

    Product and company names mentioned may be trademarks and/or registered
trademarks of their respective holders.