The science and engineering of Artificial Intelligence has come a long way since 1950, when scientists began to explore the link between human intelligence and machines. Since then, computer scientists have made advances in creating machines that can engage in human-like behaviors, mimic human thought, understand speech, and beat the best human chessplayer. Applications are far and wide, from military technology to personal cell phones. This Topic In Depth reviews some of the past accomplishments, current research and future challenges in AI. John McCarthy from the Computer Science Department at Stanford University has posted this article answering some common questions people have about Artificial Intelligence, including the implications of this work for the meaning of intelligence. (1). This next website (part of a ThinkQuest website competition) gives a history of AI among other interesting tidbits about different approaches and applications (2). The Turing Test Page elaborates on Alan Turing's conditions for considering a machine to be intelligent, which he outlined in a 1950 article that is also available from this website (3). The Singularity Institute describes itsambitious plan to develop "real AI" (4 ). The New Scientist highlights some applications for AI which range from the traditional to new wave (5 ). On a lighter note, this webpage by IBM is dedicated to Deep Blue and the event that captured the attention of chess and computer fans -- the rematch between the supercomputer, Deep Blue, and Kasparov (6 ). Ai Research has made their HAL Nursery available to the public -- a collection of "Virtual Children" you can interact with online. (7).