Windows 8, released in late October, can be controlled by touching a display screen, as well the more traditional use of a keyboard or computer mouse.

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An Ubuntu-equipped phone would plug into a dock connected to a keyboard and monitor, and the result would be a desktop computer of genuine value.

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If ever the need arises for a large keyboard and some earnest typing, they sit down in front of the nearest available computer anywhere in the world, open its web browser and access all their documents online.

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