SummaryFor a wider range of usefulness to buyers, merchants, breeders, and scientists, registers of cultivars should include the breeding history of each particular cultivar as far back as it can be traced. A cross reference of synonyms and translations of the cultivar names is also valuable.It is extremely laborious to find, select, interpret, record, and organize the pertinent information for such a register; compiling and updating the complete register is particularly tedious. This work can be greatly simplified through the use of an adequate computer system. This paper describes a system which has been developed for use with Oat cultivars (Avena) but which could be directly applicable in other areas as well. The system is completely automated throughout requiring only simple data input in the initial stages. Furthermore, the system is composed of several parts which can be used independently for specific purposes such as producing pedigree charts.A brief discussion concerning the benefits of such a register is also included.