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Tech review: A look back at the week's headlines

28 February 2014 Last updated at 10:59 GMT

Bitcoin exchange MtGox went offline after an estimated 744,000 Bitcoins - worth about $350m (£210m) - were believed to have been stolen, message service WhatsApp announced it would introduce voice calls on its network and Facebook dropped its email service.

Spencer Kelly has details of these and other technology stories of the week.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

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