Artificial intelligence (AI) refers to a computer or robot whose central processing unit is so powerful, fast, and sophisticated that it can mimic human intelligence, thinking, and possibly even emotions.
In Harlan Ellison's classic short story "I Have No Mouth and I Must Scream" (1967), a network of AI computers that collectively calls itself "AM" destroys the human race, and gives the only five surviving humans greatly extended life spans -- so it can hold them prisoners and torture them for all eternity.
In the 1970 movie Colossus: The Forbin Project (based on D.F. Jones's 1966 novel of the same title), an American supercomputer becomes self aware and takes control of Earth's weapons systems away from the humans who created it.
In the film 2001: A Space Odyssey (1968), the supercomputer HAL takes control of the spaceship sent to investigate the monolith and even kills one of the crew members.
And in Steven Spielberg's film AI, a robotics company builds an advanced robot that perfectly mimics the intelligence and emotions of a young boy. The film is based on Brian Aldiss's short story "Supertoys Last All Summer," published in 1969.