1. GENERAL DESCRIPTION The IMP-8 Sort Catalog program reads the reocrds from the IMP-8 catalog file, then sorts on the selected IMP-8 data type and produce a listing. 2. PROCESSING ENVIRONMENT The IMP-8 Sort Catalog program is developed on an Sun worksation Sun/OS system. The source codes are written in Sun FORTRAN language. A shell program was developed to execute the IMP-8 Sort Catalog program.