The impact of computers on all rea1ms of Chemistry has been one of the most important factors in the deve10pment of this science during the last years. In recognition of this fact, in 1971, the "First International Conference on Computers in Chemi­ ca1 Research and Education" , was held at DeKa1b, I11inois, USA. A second Conference took p1ace in Ljub1jana, Yugos1avia in 1973 and this third Conference in Caracas, Venezuela, in 1976. The aim of these conferences was to provide a high level forum for the 1eading researchers to exchange information at the frontiers of present day computer app1ications to the different fie1ds of Chemistry. The present "Third International Conference on Computers in Chemica1 Research, Education and Techno10gy", whose proceedings are pub1ished in the present vo1ume, was conceived, by means of aseries of invited 1ectures, as a survey of the present-date state of the art in some of the most relevant areas of computer app1ications in Chemistry.