Autonomy Private Cloud Hits 17 Petabytes

Growth of World's Largest Private Cloud Fueled by Rapid Adoption for Archiving, Compliance, eDiscovery, Legal Information Chaining, Marketing Optimization, and Video and Audio Analytics

CAMBRIDGE, England and SAN FRANCISCO, October 12, 2010 - Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in
infrastructure software for the enterprise, today announced that Autonomy's
private cloud computing platform has reached a new data processing milestone,
extending its lead as the world's largest private cloud. Autonomy private
cloud now manages over 17 Petabytes of email, documents, and multimedia data
on 6,500 servers on 8 data centers around the world. Seventeen Petabytes is
equal to more than 11 times the size of the 10 billion photos on Facebook, or
226 years of HD video.

The continued dramatic growth of Autonomy's private cloud is the result
of Autonomy's unique, meaning-based approach to cloud computing, as well as
the rapid adoption for multichannel marketing applications. Powered by
Autonomy's Intelligent Data Operating Layer (IDOL), Autonomy's private cloud
automatically recognizes concepts and patterns in the billions of files it
ingests and indexes every day. The ability to automatically understand the
meaning within all forms of data provides a significant advantage to the
customer, whether it's a compliance officer or lawyer responsible for
archiving and reviewing emails, video, and social media posts around a
particular case, or a chief marketing officer looking to deliver the most
relevant and proven content to a website visitor in real-time.

As a result, Autonomy is now the dominant leader in a range of private
cloud computing applications. Autonomy is driving rapid uptake amongst
marketers looking for a cost-effective, fast, and turnkey platform for hosted
marketing applications. For instance, a marketing team can form a virtual
chain with its network of design and advertising agencies, to securely
collaborate on the development of rich media content. Autonomy's cloud-based
marketing modules include Autonomy Optimost, Autonomy TeamSite, and Autonomy
Virage MediaBin.

Likewise, corporate legal departments are increasingly turning to
Autonomy to form a virtual private chain with their law firm partners, in
order securely collaborate on relevant information for a particular
investigation or case. This cloud-based approach to eDiscovery results in
radically compressed timeframes for the eDiscovery process. Autonomy's
private cloud processed 36,000 eDiscovery audits year-to-date, producing 48
Terabytes of eDiscovery data. Autonomy's cloud-based information governance
modules include Autonomy Consolidated Archive, Early Case Assessment,
Introspect, Legal Hold, Records Manager, Supervisor, and iManage WorkSite.

"Most technology providers consider cloud computing to be nothing more
than making the contents and applications in a digital storage box accessible
via the internet," said Mike Lynch, CEO of Autonomy. "However, Autonomy's
meaning-based approach to cloud computing brings intelligence to a range of
applications, from archiving to eDiscovery to marketing. Autonomy provides
the ideal platform for our Protect and Promote customers, who are dealing
with an increasing array of content to govern and apply policy to, produce
for eDiscovery investigations and review, and who are seeking greater agility
in launching multichannel campaigns that resonate with their customers."

Autonomy's private cloud is hosted in state-of-the-art and high-security
data centers. The data centers are under 24/7 surveillance, and each one
undergoes annual Statement of Accounting Standard number 70 or "SAS 70"
audits. Two fully synchronized, geographically separated systems provide
complete data and system redundancy and parallel processing of all tasks. The
design addresses all aspects of multi-tenancy, such as multiple firewalls and
virus protection, and is ideally qualified to support the performance and
volume requirements that are necessary for processing the rapidly expanding
number of corporate formats and unified communications - including all forms
of text, audio, and video.

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, Nestle, 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, all for Autonomy Corporation plc