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Page last updated at 14:19 GMT, Friday, 18 November 2011

The phenomenon of two screen viewing

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With a second screen - a phone, tablet or computer - watching television has become more social and more active. Viewers can flood the internet with programme-related chatter, contact TV producers or just find out more information about what is going on in front of them.

LJ Rich takes a look at the extra stuff you can stream while you have one eye on the TV screen.

Follow the Click team on Twitter - @bbcclick

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