It is research into building machines that solve problems and reason like humans.
AI is being used to create better, faster and more challenging computer games. It is often present in the opponents you play against or other team members.
But can machines behave like people?
In June 2002, a robot called Gaak acted just like a human when it made a dash for freedom from an exhibit at the Magna science centre in Rotherham. Gaak crept along a barrier until it found a gap and squeezed through. Having left the building, it reached the M1 motorway before it was rumbled.
One of the most difficult challenges faced by scientists is creating a machine with feelings and the knowledge that it exists - like a person.
Since the early 1990s, researchers have concentrated on developing robots which have insect intelligence, rather than human intelligence, which is still very sophisticated.