The following subjects are presented: (1) discussion of the merits of available techniques that may be considered for use in each stage of the process of screening aerial reconnaissance photographs for purposes of detecting objects of military significance; (2) description and com parison of alternative hardware realizations of the techniques of (1) above; (3) summary of the application of the principles of statistical de cision theory to the reconnaissance photoscreen ing problem; (4) description of the conceptual design of an imagery screening device; and (5) detaiscription of a computer simulation problem on the detection of tanks in aerial photographs. The simulation, to be carried out during the next six months, is expected to provide design details to extend the conceptual design of item (4).