Dame Wendy Hall, Professor of Computer Science at the University of Southampton, has spent a career at the forefront of developments around the web and digital media. Trained as a mathematician, she moved to the fledgling department of computer science in the mid 1980's, a time of great change and great excitement in the field.She talks to Jim Al Khalili about the rate that things have changed, how the web is still not quite what it should be, and about the new discipline she has helped to found known as Web Science.