This report presents the prototype software resulting from an initial research effort in the development of a comprehensive national planning model for higher education. The software for the prototype model requires as input existing or derivable institutional and student data and is designed to permit prototype planning studies to examine the impact of alternative federal programs on accessibility and, to a lesser extent, on institutional viability. The model also will assist in identifying high-payoff areas for future research on a comprehensive planning model and additional data requirements of such a model. The model software is written in ANS FORTRAN for use on a C.D.C. 6400 computer and requires 30K 60-bit words and utilizes two 50K random access data storage files. The design provides for interactive or batch modifications to the data files, remote batch processing with interrogation summary reports, and batch listing of detailed output information. (Author)