On the other side of the ledger, Walt Disney shares shot up 6.8% after the Mickey Mouse operation booked better-than-expected fiscal fourth-quarter earnings on strength in its cable properties like ESPN and a steady performance from its theme park business.

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Real estate agents have used it to show off properties - potential buyers sitting at home in front of a computer screen can use the mouse to look at every corner of a room or to see what the view is like over the balcony.

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