Cambridge, UK and SAN FRANCISCO — November 12, 2009 — Autonomy Corporation plc (LSE: AU. or AU.L), a global leader in infrastructure software for the enterprise, today announced that EarthLink, Inc. (Nasdaq: ELNK), a leading Internet Service Provider with millions of customers, is using Autonomy Optimost to significantly improve the click-through rates (CTR) on its web sites. For example, the search results page on my.earthlink.net has experienced a four-percent uplift in CTR, while the search results page on home.peoplepc.com has seen a greater than five-percent uplift in CTR.

The Autonomy Optimost solution allows web site owners, like EarthLink, and marketers to automatically identify the most compelling combination of web content and design by exposing different combinations of online content elements to different visitors, measuring visitors’ actions anonymously, and then optimizing the combinations based on those actions. The Autonomy Optimost solution does not collect any personally identifiable data from web site visitors. It is used by thousands of businesses around the world and has a proven track record in helping its clients achieve double-digit increases in conversion rates and online sales.

“Autonomy Optimost has changed the way we make decisions regarding how best to launch new creative and content for our websites,” said Wendy Kastner, senior manager, Creative Services at EarthLink, Inc. “We use Autonomy Optimost to make informed decisions based on quantitative analysis of the data, instead of relying solely on subjective opinions. This approach enables us to launch new campaigns more quickly and confidently, and helps us provide a compelling online experience for our customers.”

“With EarthLink’s diverse product lines, it is critical for the company to effectively deliver the right content and the best layout to its varied customer base,” said Andy Jenks, CEO of Autonomy Optimost. “Autonomy’s unique meaning-based approach recommends to web site owners the most compelling content and helps them launch new offers and campaigns in the most effective manner. We are pleased to help EarthLink to increase its click-through rates that ultimately converts into more revenue for the business.”

Please visit http://optimost.interwoven.com/ to learn more.

About EarthLink

"EarthLink. We revolve around you™." As the nation's Internet expert, Atlanta-based EarthLink has earned an award-winning reputation for outstanding customer service and its suite of online products and services. Serving millions of subscribers, EarthLink offers what every user should expect from their ISP: high-quality connectivity, minimal online intrusions and customizable features. Whether it's dial up, high-speed Internet services like DSL and cable Internet, home phone service, Web hosting, or "EarthLink Extras" like home networking or security, EarthLink connects people to the power and possibilities of the Internet. Learn more about EarthLink by calling (800) EARTHLINK or visiting EarthLink's Web site at www.earthlink.net.

About Autonomy Interwoven

Autonomy Interwoven, the leader in web content management, leverages its unique meaning-based technology to deliver the most comprehensive suite of marketing optimization and customer interaction solutions. Our flagship products, TeamSite and Optimost, enable marketers to increase results by automatically delivering the right combination of content and offers by understanding the intentions and profile of each customer. This Meaning Based Marketing approach produces the most engaging, timely and profitable customer experiences regardless of whether people interact with your organization by phone, Web, email, chat, or social networks. Unlike legacy approaches that analyze historical trends, Autonomy Interwoven does not require tagging, enabling marketing and IT professionals to work on higher value activities. Automated capabilities such as multivariable testing (MVT), segment discovery, Adaptive Targeting, product recommendations, and advanced analytics provide advanced functions that increase conversion rates, sales, customer engagement and lifetime value while automating processes to lower costs and increase marketing agility.

Autonomy Interwoven powers the world's leading corporate websites, media and ecommerce sites with 9 of the top 10 global brands relying on Autonomy Interwoven to maximize their marketing and customer interactions. Autonomy's customer base is comprised of more than 20,000 organizations, including Adidas, Allstate, the American Medical Association, AT&T, Avaya, Bank of America, BT, Channel 4, Delta Air Lines, Discovery Communications, FedEx, Ford, Konica Minolta, Lenovo, McAfee, Qantas Airways, Schneider Electric, Shutterfly, Tesco and Virgin Mobile.

Please visit www.autonomy.com/interwoven to learn more.