Sumi Das wears a backpack in a shop
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IBM's Watson gets a taste for personal shopping

In 2007 IBM began a research project to build a supercomputer that could quickly and accurately understand questions.

Seven years later, the computer called Watson has shrunk in size and is now going mobile - IBM has challenged developers to come up with ways to take advantage of its computing power.

BBC Click's Sumi Das finds out how one company is using Watson to help customers choose the right product.

Watch more clips on the Click website.

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If you are in the UK you can watch the whole programme on BBC iPlayer.

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