Software makers and PC manufacturers are hoping to spur sales with more complex touch-screen systems that can recognize more than just one or two fingers at a time, reports the New York Times. "You don’t even operate your TV with two fingers," said Amichai Ben-David, the chief executive officer of N-trig, which produces touch-screen technology for PC makers. "In order for this to feel really natural, you need more than two fingers for sure." HP has already been pushing touch technology to large businesses. It sells a custom touch interface for both desktops and laptops. Customers can turn these machines into kiosks for, say, ordering merchandise at a sporting event or flipping through a menu while waiting at a restaurant. The PC industry wants to make touch functions like these more sophisticated and widespread. On-screen objects could be twisted and turned with several fingers, mimicking the action used in real life. And the next version of Windows from Microsoft, Windows 7, will usher in a new era of touch technology when it appears on PCs later this year, Ben-David said…

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