The International Registry of Reproductive Pathology contains more than 19,000 case records. It is indexed with the aid of Systematized Nomenclature of Medicine (SNOMED) codes and the MUMPS-11 interactive computer language. A package of programs was developed to maintain an index file of cases in the collection and to produce for each species a printed list of case numbers for every combination of topography, morphology and etiology. The printed disease data from the computer are in English with corresponding SNOMED code numbers and relevant case numbers.