During a wide-ranging discussion of mobile technology at the Churchill Club in Silicon Valley, former Palm CEO and current Hewlett-Packard executive Jon Rubinstein said he believes there is plenty of room in the mobile industry for multiple operating systems. In addition, he said that although it's clear that Apple's (NASDAQ:AAPL) iOS and Google's (NASDAQ:GOOG) Android are leading the mobile OS space right now, he believes the real battle is going to be over which operating system is No. 3. "We'd sure like to be that," he said, referring to the Palm webOS platform. Article