Press Release

Let The Experts Guide You

SUNNYVALE, Calif., December 7, 2004 — With over 20,000 software titles available for Palm OS®, finding just the right application for your Palm Powered™ handheld or smartphone can be challenging. Look no further than the Palm Powered Expert Guides, one of the Web's most comprehensive directory of Palm OS applications, online resources, e-books and user testimonials that is sure to turn any Palm Powered handheld or smartphone into the ultimate personal and professional companion.

"Many Palm OS users extend the usability of Palm Powered products beyond the traditional calendaring and personal information management (PIM) applications by adding additional software," said Michael Mace, chief competitive officer for PalmSource. "We believe the Expert Guides not only offer users a great resource to learn what they can do with their device, but the guides also provide increased exposure for our Palm OS software developers, who have created some of the most innovative and useful solutions in the industry."

Written by passionate Palm Powered mobile device users with expertise in the topics covered, the Expert Guides describe and recommend the Palm OS applications tailored to special interests, professions and tasks. From astronomy to web logging, each Expert Guide includes select software applications, references to relevant eBooks and Web sites and first-person user testimonials on the specific subject area.

For avid cooks
If you're planning your next dinner party, the Food and Wine Expert Guide gives users of Palm Powered wireless devices numerous Palm OS applications, eBook titles and Web resources to help put together the perfect meal. For example, PDACookbook Lite for Palm OS helps you create shopping lists and comes complete with a cookbook and recipe manager. For more information on the Food and Wine Expert Guide, please visit www.palmsource.com/interests/foodwine.

For gamers
If you are looking for the latest gaming software titles for Palm OS®, the Games Expert Guide provides a comprehensive collection of applications including, arcade, board, card and puzzle games that are sure to provide endless hours of entertainment on a Palm Powered™ device. For example, 300 Bowl by The Way simulates arcade bowling on a Palm Powered device. For more information on the Games Expert Guide, please visit www.palmsource.com/interests/games.

For health enthusiasts
Donald M. Voltz, M.D., a practicing anesthesiologist, lends his knowledge and expertise on the topic of health and wellness to provide detailed information and guidance on diet programs, herbal medications, nutrition plans and exercise routines. Monitor your weight and manage your diet with CalorieKing Handheld Diet Diary 4.1 by CalorieKing, a software solution that helps track diet and exercise regimens with a food and exercise diary, a nutrition database and an exercise log. For more information on the Health and Wellness Expert Guide, please visit www.palmsource.com/interests/health_wellness.

For scuba divers
A certified diver, Palm Powered expert Douglas Jenkins recommends over 15 Palm OS software titles designed to capture diving logs, track scuba equipment, monitor weather conditions and manage emergency contact information on a Palm Powered device. The Scuba Diving Expert Guide also describes the website of Joseph M. Clopp, an employee at the Water Training Facilities department of U.S. Space Camp in Huntsville, Alabama, who uses a Palm Powered handheld in his work and documented his experiences online. For more information on the Scuba Diving Expert Guide, please visit www.palmsource.com/interests/scuba.

For more information
Over 50 Palm Powered Expert Guides have been created so far and can be found at www.palmsource.com/expertguides. PalmSource is encouraging new subject-matter experts to create new Expert Guides in various categories. For more information or to apply to develop an Expert Guide, please visit www.palmsource.com/interests/apply.html. The Palm OS applications featured in the Palm Powered Expert Guides are available for trial download or purchase via the PalmSource software store located at www.palmsource.com/software.

About PalmSource
PalmSource, Inc. is the company behind Palm OS®, a leading operating system powering mobile information devices. Approximately 36 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.

Products may require additional purchases including but not limited to wireless data services from mobile service providers, expansion cards, or additional software. Descriptions of third party products, features, functions or specifications, is supplied "As-Is" and with no express or implied warranties whatsoever made by PalmSource, Inc. or its third party suppliers or licensees, including but not limited to warranty for accuracy, merchantability, fitness for purpose or titles.

Copyright ﾂｩ 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 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 Expert Guides and their intended benefits for use with handheld and smartphone devices. 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 Expert Guides to achieve their intended benefits; the acceptance and use of Expert Guides by Palm Powered smart mobile device users; the ability of Palm Powered handheld and smartphone users to successfully use third party software applications to customize their handheld or smartphone devices to meet the needs of a particular industry or special interest; our ability to maintain and grow the developer community; the continued availability and growth of a large library of native software for our mobile system; the ability of PalmSource or its licensees to benefit from any growth in the wireless and/or smart mobile device markets; and the 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 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.