An International Working Party on the Definition and Classification of Disasters, sponsored by the International Trauma Foundation, developed recommendations on the definition and classification of disasters. The party consisted of: WH Rutherford (Chairman), Royal Victoria Hospital, Belfast UK; Dr. Jacob Adler, Shaare Zedek Hospital, Jerusalem, Israel; Dr. Peter Baskett, Frenchay Hospital, Bristol UK; Dr. Jan De Boer, Het Nieve Spittal, Warnsveld, Netherlands; Professor Bo Brismar, Department of Surgery, Huddinge, Sweden; Dr. Rudolf Frey, Department of Anesthesiology, University of Mainz, West Germany; Dr. Olafur Jonson, Borgarspitalinn, Reykjavik, Iceland; Dr. Stanely Miles, International Trauma Foundation, Salsbury, UK; Dr. Ronald Stewart, University of Pittsburgh, USA; Dr. Henryk Zielinski, League of Red Cross Societies, Geneva, Switzerland.