The European Registration of Congenital Anomalities and Twins (EUROCAT) is a data collection system set up as a COST concerted action under the Community medical and health research programme. EUROCAT's objectives are to provide epidemiological information, monitor trends, and to aid evaluation of the impact of diagnosis and prevention programmes. A publication entitled "EUROCAT registry descriptions 1979-90" sets out details of 22 registries throughout the Community, including information on population coverage, available services, methods of data collection, and registry organization. It is intended to aid in the interpretation of EUROCAT reports, and also to be helpful to those planning to set up new registration systems. The publication, in English (Reference EUR 13615 EN; ISBN 92-826-2755-1), is available from the Office for Official Publications at the price of ECU 8.75 excluding TVA.