This study has as its main object the formulation of an approach, as global and comprehensive as possible, to the multiple aspects of the engineer's needs for scientific and technical information. The basis of the study is an analysis of the engineer's role, its characteristics, different specialties, levels of training, and categories of functions within the profession, and a typology of information necessary for the engineer is drawn up from this standpoint. This broad evaluation leads to an investigation of methodology. Presently there is a lack of knowledge and consensus in this area which necessitates further study. An analysis of the engineer's information requirements raises three fundamental questions. The first concerns whether in fact the present classification of scientific and technical information is in harmony with the engineer's work, and whether it permits him to obtain the information he needs. The second problem relates to the training of the engineer in the utilization of present and future information means, particularly computers. The third concerns the adaptation of these considerations to third world countries. The study concludes with a synthesis in question form to provide a confrontation of different viewpoints and experiences and allow a choice of possible new studies. (Author/RAA)