From PalmSource: SAN FRANCISCO, CTIA Wireless I.T. and Entertainment, October 25, 2004 — PalmSource, Inc. (NASDAQ: PSRC), provider of Palm OS®, a leading operating system powering next generation mobile devices and smartphones, today highlighted the contributions of its licensees, partners and Palm OS application developers attending the CTIA Wireless I.T. and Entertainment show at San Francisco’s Moscone Center, October 25 through 27.

"PalmSource licensees, partners and application developers have embraced the Palm OS platform to create unique solutions that meet the needs of a diverse range of industries and consumers," said David Nagel, president and chief executive officer, PalmSource, Inc. "These companies are creating extraordinary products and applications that add even more value to the Palm Powered™ user experience and demonstrate the strength of the Palm Powered economy."

PalmSource at CTIA Wireless
PalmSource will be exhibiting in the palmOne and Orange booths. In the palmOne booth, PalmSource will be demonstrating a variety of entertainment and enterprise software for Palm OS, including Field Ranger, Handmark Express, Pocket Tunes, Sendia and WorldMate. At the Orange Partner booth, developers can learn best practices for creating Palm OS applications, get information on the Orange Developer program, and test-drive award-winning smartphone software on the latest Orange-branded Palm Powered devices.

PalmSource Partners at CTIA Wireless
Palm OS® licensees exhibiting at CTIA Wireless include palmOne and Kyocera Wireless. palmOne offers a variety of Palm Powered™ smart mobile devices including the Treo line of smartphones and the Tungsten and Zire handheld lines, while Kyocera Wireless offers the Kyocera 7135 smartphone.

Palm Powered Mobile World wireless operator partner Orange and infrastructure partners Bitfone, Handmark, Intellisync, PowerByHand, Visto and WideRay are also exhibiting at CTIA Wireless. Launched in the fall of 2003, Palm Powered Mobile World is a program designed to connect mobile operators, infrastructure providers and software developers to efficiently bring Palm OS solutions to market, providing increased revenue opportunities and a superior user experience for Palm Powered smart mobile devices.

Enterprise Solutions
A number of Palm Powered enterprise solutions are being showcased during CTIA Wireless. On Monday, October 25, palmOne president Ed Colligan kicks off the show with an Enterprise Solutions keynote address, describing the enterprise need for wireless mobility solutions. The keynote begins at 9:30 a.m. PDT.

Jud Bowman, president and COO of PowerByHand, Inc., will present during the Wireless Solutions Workshop on Tuesday, October 26 at 1:00 p.m. PDT in room 3001. The Wireless Solutions Workshop offers a series of presentations detailing real-life implementations of enterprise-grade wireless solutions that can be immediately deployed in a range of areas, including field sales and field service; healthcare; CRM; access to general-purpose applications; email and messaging; and telematics.

Email solutions rank first among all enterprise applications and Palm OS supports a wide range of email clients from companies including Good, Infowave, Intellisync, Nexic, Notify Technology, RIM Blackberry, Seven and Visto. Several of these email solutions vendors will be at CTIA Wireless showcasing their applications, including Good, Intellisync and Visto.

Other enterprise software such as Documents to Go, a popular application from DataViz, Inc., will be demonstrated at the DataViz and palmOne booths. Documents to Go allows users to open and edit Microsoft Word, Excel and PowerPoint files from their mobile device, greatly improving productivity while on the move.

Entertainment Solutions
CTIA Wireless attendees interested in reviewing the breadth of entertainment applications available for Palm OS® can visit the PowerByHand booth for demonstrations of Palm OS software including the new Pocket Tunes 3.0, featuring support for WMA music files, faster file copying and easier file organization.

"PalmSource continues to deliver a strong multi-purpose platform allowing third-party developers like NormSoft to build great mobile entertainment applications," said Tim Norman, co-founder of NormSoft, a leading Palm OS developer and creator of Pocket Tunes. "We continue to refine Pocket Tunes to deliver new functionality and easy-to-use features while exploring new applications in demand by the Palm OS user community."

For More Information
Pocket Tunes, Documents to Go and other Palm OS enterprise and entertainment applications are available for purchase and download direct from the developer’s Web site or from PalmGear.com, Handmark.com or the PalmSource software store located at www.palmsource.com/software. There are currently more than 24,000 applications available for Palm OS addressing a wide range of interests, professions and tasks. For more information on these application areas, check the PalmSource Expert Guides at www.palmsource.com/expertguides.

About PalmSource
PalmSource, Inc. is the company behind Palm OS, a leading operating system powering mobile information devices. Approximately 35 million Palm Powered handhelds and smartphones have been sold to date worldwide. Industry leaders Aceeca, AlphaSmart, Fossil, Garmin, GSL, Kyocera, Lenovo, palmOne, QTech, 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 Powered Economy. More information about PalmSource is available at www.palmsource.com, www.palmsource.co.uk, www.palmsource.fr, www.palmsource.de and www.palmsource.com.cn.

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Copyright © 2004, PalmSource, Inc., PalmSource, Palm Powered and Palm OS are trademarks or registered trademarks of PalmSource, Inc. or its affiliate in the United States, France, Germany, Japan, the United Kingdom, and other countries. All other brands, product names, company names, trademarks and service marks are the properties of their respective owners. All rights reserved.

Safe Harbor Statement
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS: This press release contains forward-looking statements that involve risks and uncertainties, as well as assumptions 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 regarding the Palm OS® platform, and Palm Powered™ products, Palm Powered applications and the Palm Powered economy. 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 Palm OS licensees and application developers to create unique solutions that meet the needs of and are adopted by end users across a diverse range of industries; our ability to achieve the anticipated benefit from introduction of new Palm Powered products and applications to the market; our ability to grow and maintain our developer community and to compete with existing and new competitors; our ability and the ability of our licensees and application developers to strengthen the Palm Powered economy, 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 Annual Report on Form 10-K for the period ended May 28, 2004 and our Quarterly Report on Form 10-Q for the period ended August 27, 2004. 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.

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