Microsoft Chief Executive Steve Ballmer has demonstrated what he called a "slate PC" being developed by Hewllet-Packard.
In his keynote address at the Consumer Electronics Show in Las Vegas, Mr Ballmer showed several manufacturers' computers that are operated by touching screens.
Touch control is one of the features that Microsoft has promoted as being significantly improved in Windows 7 since the launch of the operating system's predecessor, Vista.
BBC NEWS CHANNEL 
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