Charles talks about the history of the Cambridge Phenomenon, the book itself and some of the amusing anecdotes within, and the opportunities for having your own specially customised copy.

He also talks about life at Sinclair Research, saying that it pre-empted the Google model of working - average age below 30, drinks in the fridge and food delivered at all times. 'People worked really hard - everyone was committed to doing something unbelievably excting,' he says. 'At the shows and exhibitions we were mobbed, it was like being part of a fashion show.'

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