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MAGINE having to call an IT help desk to fix your central heating when it breaks down. That's not such a bizarre notion if a plan by engineers at IBM in Switzerland goes ahead. A cooling system they have developed allows the waste heat from computer chips to be put to use for domestic heating.

A technology that would allow a computer chip to change the electrical resistance of some of its own wiring could lead to more-powerful reconfigurable microchips that can quickly adapt themselves to new tasks, researchers at IBM say.