Press Release

PalmSource Honors Leading Palm OS Developers with Chinese Powered Up Awards

Kinoma, ESRI/AirZip and Mintel Learning Technologies Recognized at China Developer Conference

BEIJING, PalmSource China Conference, Dec. 8, 2003 - PalmSource, Inc. (NASDAQ: PSRC) provider of Palm OS®, a leading operating system powering next generation mobile devices and smartphones, today honored three Palm OS developers with the first Chinese Powered Up Awards at its second annual Developer Conference in Beijing, China. The awards recognize three Palm OS developers who have created innovative software applications that take advantage of the new features of Palm OS 5 Simplified Chinese Edition.

Powered Up Award winners at the China Developer conference were selected based on the following key criteria: innovation, newness to the category, value, ease-of-use, expansion and relevance to the Chinese market.

• Best Games/Entertainment Solution:
  Kinoma Player 2 SC by Kinoma
  Kinoma Player 2 is a platform for delivering interactive multimedia applications and one of the most popular video players for Palm Powered smart mobile devices. Together with iShell Mobile from Tribeworks, creative professionals and educators can combine video, images, text, databases, buttons, and interactivity to create interactive Kinoma applications to play on a Palm Powered smart mobile device. Kinoma 2 SC for Palm OS is now available for download at www.kinoma.com.
  
  
• Best Business/Utilities Solution:
  ESRI China (HK) Global Business/AirZip
  AirZip Accelerator provides mobile workers an image delivery technology for mobile applications running on the Palm OS platform. AirZip client and server software solutions enable images - maps, schematics, drawings, pictures, and signatures - to be encoded and displayed on a Palm Powered wireless device in seconds- saving users time and money. AirZip Accelerator for Palm OS is now available for download at www.esrichina-hk.com.
  
  
• Best Home/Education Solution:
  Memory Engine on English Study by Mintel Learning Technologies
  Mintel Memory Engine on English Study is an easy-to-use, self-paced learning system that provides students the essential vocabulary building tools for the English language. Announced separately today, Lenovo is bundling Mintel's Memory Engine on English Study in the new P100 and P300 Palm Powered handhelds. Mintel's Memory Engine on English Study for Palm OS is now available for download at www.mintelusa.com.
  
  

"Palm OS developers play a critical role in the Palm Economy by providing smart mobile device users with the applications that are right for their needs, whether for business, travel, learning or entertainment," said David Nagel, president and chief executive officer of PalmSource. "We are thrilled to recognize the contributions of these developers in the Chinese marketplace and the true value Palm OS developers offer the entire Palm Economy."

With its emphasis on openness, ease-of-use and compatibility, the Palm OS platform offers a standing invitation to innovation for software developers of all skill and experience levels to create applications that extend the capabilities of Palm Powered smart mobile devices. With more than 30 million Palm Powered devices sold worldwide to date, choosing Palm OS offers software developers new business opportunities and the chance to broaden their reach into the handheld and smartphone markets. Over 275,000 registered developers have created a variety of software applications for Palm Powered smart mobile devices ranging from Web browsers, email and Internet communications, sales force and field automation, personal productivity, groupware, financial management and games; enabling customers to tailor devices to suit their individual needs.

About PalmSource
PalmSource, Inc. is the company behind Palm OS, a leading operating system powering mobile information devices. More than 30 million Palm Powered handhelds and smartphones have been sold to date worldwide. Industry leaders Aceeca, AlphaSmart, Fossil, Garmin, GSL, HuneTec, Kyocera, Lenovo, palmOne, PerComm, Samsung, Sony, Symbol Technologies and Tapwave license Palm OS to create diverse mobile devices that meet unique customer needs. Palm OS has given rise to a large community of users, enterprises, developers and manufacturers, who together make up the Palm Economy. More information about PalmSource is available at www.palmsource.com, http://www.palmsource.co.uk, http://www.palmsource.fr, http://www.palmsource.de and http://www.palmsource.com.cn.

Palm OS is a registered trademark and Palm Powered is a trademark of Palm Trademark Holding Company, LLC. Other brands may be trademarks of their respective owners.

This press release contains forward-looking statements that involve risks and uncertainties, as well as assumptions that, if they never materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. Such forward-looking statements include, without limitation, statements related to contributions of and new business opportunities for Palm OS developers, and the openness, ease-of-use and compatibility of the Palm OS platform. The risks and uncertainties that could cause our results to differ materially from those expressed or implied by such forward-looking statements include, without limitation, the ability of our developers to successfully innovate with Palm OS and extend the capabilities of Palm Powered smart mobile devices and grow the Palm Economy, the ability of our developers to compete with existing or new competitors and to timely introduce new products, our ability to maintain and grow the Palm OS developer community, general economic conditions in the U.S. and abroad and other risks and uncertainties contained in our public announcements, reports to stockholders and other documents filed with and furnished to the Securities and Exchange Commission, including our Quarterly Report on Form 10-Q for the period ended August 29, 2003. All forward-looking statements in this press release are based on information available to us as of the date hereof, and we assume no obligation to update these forward-looking statements.