Press Release

PalmSource and Visto To Create Email Messaging Client for Palm OS Platform

CeBIT AMERICA, NEW YORK, - June 18, 2003 - PalmSource, Inc., provider of the popular operating system for handheld and smartphone devices, and Palm OS® subsidiary of Palm, Inc. (Nasdaq: PALM), and Visto Corp., the leading provider of personal and corporate mobile access solutions that are easy to install, administer and use, today announced that the companies will work together to build a standard enterprise-grade wireless email client for the Palm OS platform. PalmSource and Visto will co-market the new default messaging solution to Palm OS licensees and their wireless operators, resulting in easier integration with existing IT infrastructures.

The new email client for the Palm OS platform will provide secure, reliable push-email capabilities between Palm Powered™ mobile devices and enterprise-grade mail servers such as Microsoft Exchange and Lotus Domino, as well as access to POP3/IMAP mail servers, allowing enterprise users to stay connected to data while away from the office. The new email client will become the default messaging solution for the Palm OS platform.

"Visto's carrier-agnostic platform and the flexibility of the Palm OS platform enables the creation of the strongest enterprise-grade email client for Palm OS licensees and their users," said David Nagel, president and CEO of PalmSource, Inc. "The built-in email client will allow enterprises to quickly deploy a variety of Palm Powered devices already tailored to work with leading messaging solutions."

"PalmSource's selection of Visto validates the fact that Visto has great products, financial stability, compelling intellectual property and customer traction, making us the global market leader in mobility solutions," said Brian Bogosian, chairman, president and CEO of Visto. "We believe the combination of the Palm OS and the Visto wireless email architecture will provide an extremely compelling solution to Palm OS device licensees, wireless operators, and their enterprise users."

About Visto Corporation
Established in 1996, Visto (www.visto.com) is the leading provider of mobile access solutions for enterprises and mobile professionals, delivered via wireless operators and device manufactures. Visto's technology provides secure access to the most widely used corporate applications over any network and on a broad array of devices, and supports both browser-based as well as offline-capable devices. Visto Mobile Access Solution, Server Edition, provides departmental and enterprise access to corporate email. Visto MessageXpress provides individual access to corporate, Internet and POP3 email. Both Server Edition and MessageXpress are well suited to the "converged" wireless PDAs/phones using Palm OS, Pocket PC, SmartPhone, J2ME and Symbian platforms. Visto's WirelessInbox, provides real time access to corporate and personal email via direct access through desktop computers via any wireless device's browser and is well suited to wireless phones with only WAP browser capability. Leveraging a portfolio of eight granted patents in synchronization, access and security technologies, Visto's platform is a proven, scalable solution that has supported more than 2.7 million users. Visto's solutions are available through wireless operators worldwide, including AT&T Wireless, Bell Mobility, KPN, Manitoba Telecom Services, Nextel Communications, Inc., Rogers AT&T Wireless, SmarTone, TELUS Mobility and SaskTel Mobility. http://www.visto.com

About PalmSource
PalmSource is the company behind Palm OS, the popular operating system for handheld and smartphone devices. Licensed by industry leaders -- including Aceeca, Acer, AlphaSmart, Fossil, Garmin, GSL, Handspring, HuneTec, Kyocera, Legend, Palm, Samsung, Sony, Symbol and Tapwave as well as Palm OS Ready Partners including ATI, Intel, MediaQ, Motorola, Samsung Semiconductor and Texas Instruments -- Palm OS has shipped on more than 29 million handheld and smartphone devices, and given rise to a large community of users, enterprises, developers and manufacturers, who together make up the Palm Economy. PalmSource's headquarters is located at 1240 Crossman Ave. in Sunnyvale, Calif. PalmSource is a subsidiary of Palm, Inc. (Nasdaq: PALM). More information about PalmSource, Inc. www.palmsource.com.