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Duncan Graham-Rowe

Screened: Five best social voice-messaging apps

CGI: Now as easy as ABC

Raspberry Pi: Britain's £16 computer (and what powers it)

How Nathan Eagle's Jana service aims to top up Africa

DIY pollution monitor could help you to breathe easy

A £400,000 PC downgrade: Rebooting Babbage’s Analytical Engine

John Brockman: Matchmaking with science and art

Faith in numbers

Visions of the future