This study reviews briefly the computational aspects required for the application of input-output analysis to resources management, with special emphasis on the adoption of a national input-output model for structural analysis of specific industries and specific regions. Programs for handling input-output models of the size of the current 1963 U.S. model were formulated, and their empirical application for a detailed analysis of the U.S. mineral industry was tested. The seven mining sectors presented in the national input- output table for 1963 are disaggregated into 44 subsectors, based on data provided by the Bureau of Mines. The input-output information for these subsectors was then incorporated into the national model to constitute a 399-order table. A corresponding "direct requirements" table and a "direct and indirect requirements" table were then computed, applying the computer programs developed for those purposes. The resulting transactions, relations, and the coefficients for the 44 mineral subsectors are presented.