How a person with paralysis might control a wheelchair with eye movements alone
BBC World Service
A report on London through the ages via a captivating app
Researchers turn images into sound to help the blind and partially-sighted.
Simon Morton reports on the winners of the Imagine Cup, plus poetry for smartphones
Andrew Blum goes behind the scenes of the internet in his book, Tubes.
A report on the bear at the centre of an interactive documentary.