Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in infrastructure software for the enterprise, today announced that Software Magazine has named it one of the world's largest software companies in 2008 in the publication's 26th Annual Software 500 ranking of the world's largest software and service providers. This marks the ninth consecutive year that Autonomy has been recognized by the publication. The "Software 500" is currently featured on the publication's Web site ( ).

"The 2008 Software 500 results show that revenue growth in the software and services industry was healthy," says John P Desmond, editor of Software Magazine and Softwaremag.com. "The Software 500 helps CIOs, senior IT managers and IT staff to research and create the short list of business partners. It is a quick reference of vendor viability. Autonomy has continuously achieved outstanding financial performance in a challenging economic climate with revenues of $343.4 million in 2007, up 37 percent from 2006. We are pleased to recognize it in our Software 500 ranking."

The Software 500 is a revenue-based ranking of the world's largest software and services suppliers targeting medium to large enterprises, their IT professionals, software developers and business managers involved in software and services purchasing. The ranking is based on total worldwide software and services revenue for 2007. This includes revenues from software licenses, maintenance and support, training and software-related services and consulting. Suppliers are not ranked on their total corporate revenue, since many have other lines of business, such as hardware. The financial information was gathered by a survey prepared by King Content Co. and posted at , as well as from public documents.

"Autonomy's strategic value in the enterprise has risen with the proliferation of unstructured information and with changes in regulatory requirements. Litigation is exploding as a result of recent turmoil in the financial markets. Companies must be able to analyze all of their enterprise information quickly and accurately in order to comply with regulations," said Mike Lynch, CEO of Autonomy. "Autonomy's Meaning-Based Computing is the only technology available that enables computers to understand the relationships that exist between disparate pieces of information and perform sophisticated analysis operations with real business value, automatically and in real-time. With Autonomy, organizations are able to maximize the value of information and mitigate its associated risks."

About Digital Software Magazine, the Software Decision Journal, and Softwaremag.com

Digital Software Magazine, the Software Decision Journal, has been a brand name in the high-tech industry for 30 years. Softwaremag.com, its Web counterpart, is the online catalog to enterprise software and the home of the Software 500 ranking of the world's largest software and services companies, now in its 26th year. Software Magazine and Softwaremag.com are owned and operated by King Content Co.

About Autonomy

Autonomy Corporation plc (LSE: AU. or AU.L) is a global leader in infrastructure software for the enterprise and is spearheading the meaning-based computing movement. 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, be it text, email, voice or video. Autonomy's software powers the full spectrum of mission-critical enterprise applications including information access technology, pan-enterprise search, information governance, end-to-end eDiscovery and archiving, records management, business process management, customer interaction solutions, and video and audio analysis, and is recognized by industry analysts as the clear leader in enterprise search.

Autonomy's customer base comprises of more than 17,000 global companies and organizations including: 3, ABN AMRO, AOL, BAE Systems, BBC, Bloomberg, Boeing, Citigroup, Coca Cola, Daimler Chrysler, Deutsche Bank, Ericsson, Ford, GlaxoSmithKline, Lloyd TSB, NASA, Nestle, the New York Stock Exchange, Reuters, Shell, 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 350 companies OEM Autonomy technology, including BEA, Citrix, EDS, H-P, Novell, Oracle, Sybase and TIBCO, and the company has over 400 VARs and Systems Integrators. The company has offices worldwide.

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:

Winifred Shum,

Autonomy (US),

+1-408-771-6668