Jon Rubinstein, the former Apple executive who took over handheld maker Palm and moved with it to Hewlett-Packard in a 2010 acquisition, has left HP

In 2009 he replaced longtime Palm executive Ed Colligan as its CEO, and oversaw a dramatic restructuring of the company’s products, including a significant rebuild of its smartphone operating system. Gone was the legacy PalmOS that had been used in so many popular devices like the Treo that for a time competed seriously against Research In Motion’s Blackberry.( dvd to ipad for mac)

PalmOS was replaced by WebOS, which first appeared on the Pre smartphone, then later on the Pixi and Veer devices. After HP acquired Palm, WebOS was also used on the abandoned TouchPad tablet, and is now an open source operating system overseen by HP.( transfer music from ipad to computer)

After HP decided to exit the WebOS hardware business, Rubinstein was assigned to a vaguely described “product innovation role” within HP’s Personal Systems Group during a management shakeup last July. It was an unusual move and one made with little explanation at the time. But sources say it was a preface to Rubinstein’s departure, one intended to lessen its PR impact when he finally left. “That ‘innovation’ gig he was given in July was his first step toward the exit,” said one source, a former Palm exec with close ties to Rubinstein.