A seminal work in the concept of computer intelligence is "On Computing Machinery and Intelligence" (1950), by Alan Turing. See Turing Test for further discussion.
The [Loebner Prize]? competition has been claimed to be "the first formal instantiation of the Turing Test." Even so, many computer scientists reject any validity in the test, claiming most of the entrants to be formula based gimmics. Criticisms include that the target (of a computer to be able to reply indistinguishably from a real person) is much too far fetched. Anybody attempting it, they claim, would be forced to use formulaic means (such as a database of pre-made replies) in order to win. Despite the publicity for AI generated by the Loebner prize some even see it as detrimental to the field. The argument is that it focuses resources to much on trying to emulate humans, rather than trying innovative approaches with more easily obtainable targets.
See also: Artificial intelligence projects, computer science, cognitive science, semantics, The Singularity, ALICE?, ELIZA
Fields in AI:
Loebner Prize website at: http://www.loebner.net/Prizef/loebner-prize.html