Will computers ever be intelligent?

The film 2001: A Space Odyssey is 30 years old. Our science editor, Dr David Whitehouse, wonders if we will ever be able to build the star of the film, HAL, the intelligent computer.

Do you remember 1968? The year of the miniskirt, the Kodak Instamatic camera and funny hairstyles? Dick Fosbury did his flop at the Olympics and Philip K Dick wrote "Do Androids dream of Electric Sheep", later to be filmed as Blade Runner.