Todd Bradley, CEO at PalmOne, will resign at the end of the first quarter but remain with the company until May, PalmOne Monday announced in a release.

Bradley was named CEO in October of 2003 when PalmOne spun off PalmSource, which develops the Palm OS, and acquired Handspring. Ed Colligan, currently PalmOne's president and formerly president and COO at Handspring, will become the interim CEO while PalmOne's board of directors searches for a replacement.

PalmOne virtually invented the PDA, but has steadily lost market share to companies like HP in recent quarters as the entire PDA market declines. However, the company has a hit with the Treo smart phone products, originally developed by Handspring. Bradley was credited as a force behind the Handspring acquisition by Eric Benhamou, PalmOne's chairman, in a statement.

The company's board of directors plans to take some time to evaluate potential external candidates, as well as Colligan, for the CEO position, said Marlene Somsak, a PalmOne spokeswoman. However, they realize that the decision should be made as quickly as possible, she said.

Analysts predict that stand-alone PDAs will eventually die out in favor of voice-enabled handheld devices like the Treo 650 and HP's iPaq h6315. PalmOne expects most of its future growth to come from the Treo family of products as well as PDAs with wireless Internet connectivity.

Bradley is leaving to pursue other challenges, he said in a release. He will remain as CEO until Feb. 25, when PalmOne's third fiscal quarter ends, and will advise the company on its management transition until the end of its fiscal year in May.

Bradley joined PalmOne as head of the company's hardware business in June 2001 after leaving Gateway, where he held numerous positions in sales and management. He is also a veteran of GE Capital, The Dun & Bradstreet and FedEx, according to his executive biography on PalmOne's Web page.

PalmOne's business is changing significantly with the success of the Treo products, said Sam Bhavnani, an analyst with Current Analysis, in La Jolla, Calif. The Milpitas, Calif., company must now move its primary products through wireless carriers, who present a very different business model than retail stores or direct online sales, he said.

The IDG News Service is a Network World affiliate.