BURLINGTON, MA, August 25, 2008 – Nuance Communications, Inc. (NASDAQ: NUAN)and its Tegic subsidiary today announced that they have filed a patent infringement lawsuit against Zi Corporation (TSX: ZIC and NASDAQ: ZICA) in the Federal Court in Toronto, Canada. In the Statement of Claim, Nuance and Tegic assert that Zi’s Qix and eZiText products infringe Tegic’s intellectual property. The claim accuses Zi of infringing Canadian Patent Numbers 2,399,961 and 2,278,549, each entitled “Reduced Keyboard Disambiguating System.” Nuance is seeking damages from Zi’s infringement as well as a judgment enjoining Zi’s further infringement.

“Nuance has invested significant resources in developing technologies, building solutions and acquiring intellectual property,” said Jo-Anne Sinclair, vice president and general counsel of Nuance Communications. “These inventions and the intellectual property protecting those inventions are critical to our business. We take great pride in and place significant value on our patents and will aggressively protect our intellectual property rights through all available means.”

Nuance holds more than 1000 patents and patent applications. Nuance has made significant investments in research, development and the acquisition of intellectual property in the field of software for mobile devices to provide its customers with innovative industry-leading solutions.

About Nuance Communications

Nuance (NASDAQ: NUAN - News) is a leading provider of speech and imaging solutions for businesses and consumers around the world. Its technologies, applications and services make the user experience more compelling by transforming the way people interact with information and how they create, share and use documents. Every day, millions of users and thousands of businesses experience Nuance’s proven applications and professional services. For more information, please visit www.nuance.com

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