Press Release

PalmSource to Present at Smartphone Summit and CTIA Wireless 2005

What:
PalmSource, Inc. (NASDAQ: PSRC), provider of Palm OS®, a leading operating system powering next generation phones and mobile devices will be presenting at the Smartphone Summit on March 13, and CTIA Wireless 2005 on March 15, in New Orleans, La. PalmSource is a gold sponsor of the Smartphone Summit and will be exhibiting in booth #512 in Hall F of the Enterprise Mobility Pavillion in the Ernest N. Morial convention center at CTIA Wireless, March 14–16.

The Company will showcase the latest cutting–edge Palm Powered™ smartphones and wireless third–party enterprise and consumer Palm OS solutions. Users can find these applications through the PalmSource software store online at www.palmsource.com/software and over–the–air at www.palmsource.com/mobile.

When:
Sunday, March 13 at 12:00 p.m. "Smartphone Device Showcase" in room 275.
Sunday, March 13 at 1:00 p.m. "The Future of the Smartphone" in room 275.
Sunday, March 13 at 3:00 p.m. "Best New Smartphone Applications" in room 275.
Tuesday, March 15 at 1:00 p.m. "Mobile Device Trends and Challenges" CTIA Wireless plenary session in room 260–262.

Where:
Ernest N. Morial Convention Center
900 Convention Center Blvd., New Orleans, LA 70130

About PalmSource
PalmSource, Inc. is the company behind Palm OS, a leading operating system powering mobile information devices. Approximately 38 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, www.palmsource.com/es and www.palmsource.com.cn.

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 regarding the Palm Powered™ economy and the wireless markets; and the benefits of 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 our realization of a growing momentum of the Palm Powered economy in the wireless market; the ability of the Palm OS platform to enable Palm OS licensees and developers to bring innovative and easy–to–use products and solutions to market in an timely manner; 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 Reports on Form 10–Q for the periods ended August 27, 2004 and November 26, 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.

Copyright © 2005, 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. These marks may not be used in connection with any product or service that does not belong to PalmSource, Inc. (except as expressly permitted by a license with PalmSource, Inc.), in any manner that is likely to cause confusion among customers, or in any manner that disparages or discredits PalmSource, Inc., its licensor, its subsidiaries or affiliates. All other brands, product names, company names, trademarks and service marks are the properties of their respective owners. All rights reserved.