This paper gives a brief timeline of the evolution of the field of Artificial Intelligence (AI), a field that is currently generating approximately sixty thousand research papers per year. This represents a 12.9% growth in output over the past five years, and is markedly higher than the growth seen across all research, which has grown at a rate of 2.3% per year in the same period. AI research is of interest around the world and this paper highlights many of the activities undertaken to stimulate this research in the USA,
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