Autonomy Named to Bloomberg Businessweek Hot Tech 50 Ranking

Autonomy Recognized as One of the Top Performing Tech Companies of 2010

CAMBRIDGE, England and SAN FRANCISCO, December 16, 2010 - Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in
infrastructure software for the enterprise, today announced that it has been
named to Bloomberg Businessweek's Hot Tech 50 list, an annual, global ranking
of the top performing companies in technology. The Bloomberg Businessweek Hot
Tech 50 is based on a weighted measurement of several metrics, including
overall sales growth, employee growth, return on investment capital, and
stock return.

"The global technology landscape is undergoing a fundamental
restructuring - based on the inexorable growth of unstructured information,
including email, social media, video, and web content," said Mike Lynch, CEO
of Autonomy. "Autonomy is at the forefront of this monumental shift, by
enabling businesses to automatically understand the meaning within all this
data and act on it in real-time. Autonomy's Meaning Based Computing platform
is universal, spanning everything from helping a marketer drive improved
campaign returns on their website, to enabling a lawyer to pinpoint the exact
content needed to win a case, to helping a doctor improve quality of care
through more accurate diagnoses."

Please visit www.autonomy.com/HotTech502010 to review the
Bloomberg Businessweek Hot Tech 50.

About Autonomy

Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in
infrastructure software for the enterprise, spearheads the Meaning Based
Computing movement. IDC recently recognized Autonomy as having the largest
market share and fastest growth in the worldwide search and discovery market.
Autonomy's technology allows computers to harness the full richness of human
information, forming a conceptual and contextual understanding of any piece
of electronic data, including unstructured information, such as text, email,
web pages, voice, or video. Autonomy's software powers the full spectrum of
mission-critical enterprise applications including pan-enterprise search,
customer interaction solutions, information governance, end-to-end
eDiscovery, records management, archiving, business process management, web
content management, web optimization, rich media management and video and
audio analysis.

Autonomy's customer base is comprised of more than 20,000 global
companies, law firms and federal agencies including: AOL, BAE Systems, BBC,
Bloomberg, Boeing, Citigroup, Coca Cola, Deutsche Bank, DLA Piper, Ericsson,
FedEx, Ford, GlaxoSmithKline, Lloyds Banking Group, NASA, Nestlé, the New
York Stock Exchange, Reuters, Shell, Tesco, T-Mobile, the U.S. Department of
Energy, the U.S. Department of Homeland Security and the U.S. Securities and
Exchange Commission. More than 400 companies OEM Autonomy technology,
including Symantec, Citrix, HP, Novell, Oracle, Sybase and TIBCO. The company
has offices worldwide. Please visit www.autonomy.com to find out more.

Autonomy and the Autonomy logo are registered trademarks or trademarks of
Autonomy Corporation plc. All other trademarks are the property of their
respective owners.

    Autonomy Editorial Contacts:
    Randy Cairns                         Louise Kehoe
    Autonomy (US)                        Ogilvy PR (US)
    +1-408-953-7111                      +1-415-677-2739
    Randy.cairns@autonomy.com            louise.kehoe@ogilvypr.com

    Edward Bridges                       David Vindel
    Financial Dynamics (UK)              The Red Consultancy (UK)
    +44-207-831-3113                     +44-207-025-6529
    edward.bridges@fd.com                david.vindel@redconsultancy.com

Randy Cairns of Autonomy (US), +1-408-953-7111, Randy.cairns at autonomy.com; or Louise Kehoe of Ogilvy PR (US), +1-415-677-2739, louise.kehoe at ogilvypr.com; or Edward Bridges of Financial Dynamics (UK), +44-207-831-3113. edward.bridges at fd.com; or David Vindel of The Red Consultancy (UK), +44-207-025-6529, david.vindel at redconsultancy.com