LISBON, Portugal, April 21, 2008 —- Teradata Corporation (NYSE:TDC), the global leader in enterprise data warehousing, today announced that MobilTel AD, Bulgaria's number one mobile operator, is implementing a Teradata system for pan-enterprise business intelligence with a focus on marketing analytics to improve customer relationship management (CRM).

The Teradata information environment will provide both deeply detailed data as well as aggregated reports — resulting in faster and more accurate intelligence for decision making. The system will also ensure more precise and insightful business analyses — derived from high-performance in-database data mining. With key performance indicators readily available, MobilTel will be able to enrich its business intelligence as well as optimize its CRM.

"We have five million customers and we made a decision to make a major change in the data warehouse and selected Teradata as the vendor for our data warehousing requirements. Previously we have used Oracle throughout our information infrastructure. Nonetheless, we made this important decision because of the positive group synergies we experienced with the Teradata team, the clear cost advantages and the positive performance of Teradata and its power of scalability," said Viktor Vidolov, director of quality and security of technologies at MobilTel.

Teradata Warehouse creates a single view on the business by integrating all data across the entire organization of MobilTel. During the implementation process, MobilTel's data will be defined more clearly, coherence of its data management will be ensured and data security will be improved. The implementation is supported by experts from Mobilkom Austria Group, which took over MobilTel in 2005.

"MobilTel is the first mobile operator in Bulgaria to introduce Teradata business intelligence technology to the market," said Hermann Wimmer, president for Europe, the Middle East and Africa, Teradata. "Teradata is gaining enormous momentum in telecommunications markets in Europe and around the world. The extremely fast, accurate and detailed data management capabilities of Teradata deployed by the company will give them powerful new insight and revenue possibilities as they expand."

About MobilTel AD

MobilTel AD is the number one Bulgarian mobile operator. The company was founded in March 1994 and launched its first commercial services in September 1995. Delivering mobile communications under the M-Tel brand, the company celebrated its 3 millionth subscriber in September 2004 and continues to keep the biggest market share in its sector. MobilTel AD has roaming agreements with 307 operators from 135 countries all over the world. In May 2004, MobilTel changed ownership for EUR 1.2 billion. This is the largest ever acquisition in Central and Eastern Europe. Among the new investors are ABN AMRO Capital, Citigroup Investments Inc. and Communications Venture Partners Limited. In 2005, Mobilkom Austria Group acquired 100 percent of MobilTel and completed its integration by 2006. For further information please visit the website: www.mtel.bg.

About Teradata

Teradata Corporation (NYSE: TDC) is the world's largest company focused on raising intelligence through data warehousing and enterprise analytics. Teradata is in more than 60 countries and on the web at www.teradata.com.

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Teradata is a trademark or registered trademark of Teradata Corporation in the United States and other countries.