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Why train windows could start talking

5 July 2013 Last updated at 14:07 BST

Twitter has released a new tool to help more people follow the events in Egypt by providing automated translation powered by Microsoft Bing, Mozilla launches a new smartphone operating system and why train windows could start playing adverts.

BBC Click's Spencer Kelly looks at these and other tech news stories.

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