IBM on Monday unveiled two new models in its ThinkPad line of laptops that boast a new data protection scheme that detects sudden movements - such as a dropped notebook - and locks down the hard drive before the fall can cause a crash. "The new ThinkPad R50 and T41 laptops boast what IBM’s calling Active Protection System, technology that responds to sudden acceleration by parking the hard drive read/write head until the PC is stabilized."

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