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Apple has bought social media data analytics firm, Topsy Labs, which specialises in using data from Twitter to track customer sentiment.
Topsy is one of the few firms to have access to Twitter's entire data stream.
It has recently created a searchable database of all tweets sent - more than 400 billion - since Twitter's launch.
Apple did not say how much it paid for the firm, but the Wall Street Journal which first reported the story put the figure at around $200m (£122m).Apple Acquires Social media Analytics Company, Topsy Labs [bbc.co.uk]