Press Release

PalmSource Names Jean-Louis Gassée Chairman of the Board

SUNNYVALE, Calif., November 2, 2004- PalmSource, Inc. (NASDAQ: PSRC), provider of Palm OS®, a leading operating system powering the next generation of mobile devices and smartphones, today announced Jean-Louis Gassﾃｩe has been appointed Chairman of the PalmSource Board of Directors. Gassﾃｩe, 60, was appointed to the Company's Board of Directors in May 2002. Last August (2004) Eric Benhamou announced his intention to resign his position as Chairman of the Board effective following the Company's annual meeting held on October 28, 2004.

"We are delighted that Jean-Louis has been appointed Chairman," said David Nagel, CEO, PalmSource. "He knows our company. He knows our product. He knows our customers. He knows our market and he has a proven record of successfully building and growing companies. I'm looking forward to working with Jean-Louis as PalmSource continues to provide the market with the industry-leading Palm OS for smartphones and mobile devices."

"PalmSource is a leader in operating systems for smartphones and mobile devices, a growing market with tremendous potential," said Jean-Louis Gassﾃｩe. "I'm excited to work with Dave, PalmSource's management team and its talented people to expand the Company's leadership to the next level of growth."

Gassﾃｩe currently serves as a general partner with Allegis Capital, a venture capital firm. Previously, he served as president and chief executive officer of Computer Access Technology Corporation, a leading provider of protocol analyzers. Before joining CATC, Gassﾃｩe was president and chief executive officer of Be Inc., the maker of a high-performance operating system for information appliances. In 2001, Palm, Inc acquired technical assets from Be, Inc. Prior to Be, he was a nine-year veteran of Apple Computer Inc. where he served in a variety of executive positions, including president of the Apple Products Division. In addition to PalmSource, Gassﾃｩe serves on the board of Electronics for Imaging, Inc.

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.

Copyright ﾂｩ 2004, PalmSource, Inc. PalmSource 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 Palm OS smartphones and mobile devices and PalmSource's management team and employees. 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 licensees to develop and market industry leading Palm Powered smartphones and mobile devices that meet end user demands in a timely fashion; our ability to maintain and develop our management team and employees 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.