A system was developed for the collection, coding, and processing of data from routine reports describing morbidity caused by gonorrhea. These data are coded centrally, and tables that provide information about the age, sex, race, source of care, and geographic and temporal distributions of the population affected by gonorrhea are generated. Applications of the system are described; these include study of distribution of the disease, trends in utilization of facilities, seasonal trends in incidence of the disease, and several features of recidivism in the Denver (Colorado) metropolitan area. This system has potential as a tool for evaluation of disease control efforts in any standard metropolitan statistical area.